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Selected publications of WHK

 

Recent PhD Theses:

Ytterbium fiber laser driven, multiwavelength femtosecond optical system operating in the ultra-violet, visible, near-infrared and mid-infrared  Yuhong Yao, 2015 PhD Thesis

Femtosecond laser processing of ophthalmic materials and ocular tissues: a novel approach for non-invasive vision correction Thesis (Ph. D.)--University of Rochester. Institute of Optics, 2013.

Nonlinear imaging in scattering media with pump-probe and fluorescence-based techniques Liping Cui Thesis (Ph. D.)--University of Rochester. Institute of Optics, 2011.

Novel devices and applications based on micro-processed optical fibers Parama Pal Thesis (Ph. D.)--University of Rochester. Institute of Optics, 2010.

Micro-processing of polymers and biological materials using high repetition rate femtosecond laser pulses Li Ding Thesis (Ph. D.)--University of Rochester. Institute of Optics, 2009.

 

 

 

 

Selected Publications

 

Femtosecond laser writing of freeform gradient index microlenses in hydrogel-based contact lenses By: Gandara-Montano, Gustavo A.; Ivansky, Adam; Savage, Daniel E.; et al. OPTICAL MATERIALS EXPRESS  OPTICAL MATERIALS EXPRESS   Volume: 5   Issue: 10   Pages: 2257-2271   Published: OCT 1 2015

High-Contrast, Closed-Loop Control of Laser Beam Profiles McIntire, Leva E.; Divoky, Martin; Knox, Wayne H.; Bahk, Seung-Whan; Zuegel, Jonathan D. 2015 CLEO: Science and Innovations, Paper# STu2N.3

Yb:fiber laser-based, spectrally coherent and efficient generation of femtosecond 1.3-mu m pulses from a fiber with two zero-dispersion wavelengths By: Yao, Yuhong; Agrawal, Govind P.; Knox, Wayne H. OPTICS LETTERS   Volume: 40   Issue: 15   Pages: 3631-3634   Published: AUG 1 2015

Yb:fiber laser-based, spectrally coherent and efficient generation of femtosecond 1.3-μm pulses from a fiber with two zero-dispersion wavelengths Yao, Yuhong; Agrawal, Govind P.; Knox, Wayne H. 2015 Optics Letters 40(15) 3631-3634  View: HTML | PDF

Speckle-free femtosecond red-green-blue (RGB) source from a fiber laser driven spectrally efficient two zero dispersion wavelength fiber source By: Yao, Yuhong; Knox, Wayne H. OPTICS EXPRESS    Volume: 23   Issue: 1   Pages: 536-544   Published: JAN 12 2015

"First Demonstration of Ocular Refractive Change using Blue-IRIS in Live Cats Daniel E. Savage,", Daniel R. Brooks, Margaret DeMagistris, Lisen Xu, Scott MacRae, M.D., Jonathan D. Ellis, Ph.D., Wayne H. Knox, Ph.D., Krystel R. Huxlin, Ph.D., submitted, IOVS (2014.)

"Precision large field scanning system for high numerical aperture lenses and application to femtosecond micromachining of ophthalmic materials," D. R. Brooks, N. S. Brown, D. E. Savage, C. Wang, W. H. Knox and J. D. Ellis, Rev. Sci. Instrum. 85, 065107 (2014); http://dx.doi.org/10.1063/1.4880727

"Broadly tunable femtosecond mid-infrared source based on dual photonic crystal fibers," Yuhong Yao and  Wayne H.  Knox, Optics Express, Vol. 21 Issue 22, pp.26612-26619 (2013)

"Dual photonic crystal fiber broadly tunable femtosecond mid-infrared source," Frontiers in Optics (FiO) 2013 paper: FW6B.3 OSA Postdeadline Paper Digest (online) Yuhong Yao and  Wayne H.  Knox

"Difference frequency generation of femtosecond mid infrared pulses employing intense Stokes pulses excitation in a photonic crystal fiber,", Yuhong Yao;, Wayne H. Knox, Optics Express, Vol. 20 Issue 23, pp. 25275-25283 (2012)

"Lateral gradient index microlenses written in ophthalmic hydrogel polymers by femtosecond laser micromachining,", Lisen Xu;, Wayne H. Knox, OPTICAL MATERIALS EXPRESS Volume: 1 Issue: 8 Pages: 1416-1424 (Published: DEC 1 2011)

"Exogenous and endogenous two-photon absorption for Intra-tissue Refractive Index Shaping (IRIS) in live corneal tissue [Invited]," , Lisen Xu;, Wayne H. Knox and, Krystel R. Huxlin, OPTICAL MATERIALS EXPRESS Volume: 1 Issue: 7 Pages: 1159-1164 (Published: NOV 1, 2011)

"Noninvasive Intratissue Refractive Index Shaping (IRIS) of the Cornea with Blue Femtosecond Laser Light," Lisen Xu, Wayne H. Knox, Margaret DeMagistris, NadanWang and Krystel R. Huxlin,IOVS October 2011 52:8148-8155; published ahead of print September 19, 2011, doi:10.1167/iovs.11-7323

"Lateral gradient index microlenses written in ophthalmic hydrogel polymers by femtosecond laser micromachining," Lisen Xu and Wayne H. Knox, Optical Materials Express, Vol. 1, Issue 8, pp. 1416-1424 (2011) http://dx.doi.org/10.1364/ OME.1.001416

"High-resolution, non-invasive two-photon fluorescence measurement of molecular concentrations in corneal tissue," Liping Cui, Krystel R. Huxlin, Lisen Xu, Scott MacRae, M.D. and Wayne H. Knox January 12, 2011, doi: 10.1167/iovs.10-6620 Invest. Ophthalmol. Vis. Sci. January 12, 2011 iovs.10-6620

"Exogenous and endogenous two-photon absorption for Intra-tissue Refractive Index Shaping (IRIS) in live corneal tissue," Lisen Xu, Wayne H. Knox, and Krystel R. Huxlin, Optical Materials Express, Vol. 1, Issue 7, pp. 1159-1164 (2011), http://dx.doi.org/10.1364/ OME.1.001159

"Forty-five degree backscattering-mode nonlinear absorption imaging in turbid media " Liping Cui, Wayne H. Knox Journal of Biomedical Optics Volume: 15 Issue: 2 Article Number: 026004 Published: MAR-APR 2010

"Spatial coherence from ducks," Wayne H. Knox, Miguel Alonso, and Emil Wolf, Physics Today Volume: 63 Issue: 3 Pages: 11-11 Published: MAR 2010

"Potentiation of Femtosecond Laser Intratissue Refractive Index Shaping (IRIS) in the Living Cornea with Sodium Fluorescein," Lana J. Nagy, Li Ding, Lisen S. Xu, Wayne H. Knox and Krystel R. Huslin, Investigative Ophthalmology & Visual Science Volume: 51 Issue: 2 Pages: 850-856 Published: FEB 2010

"Optimization of femtosecond laser micromachining in hydrogel polymers," Li Ding, Dharmendra Jani, Jeffrey Linhardt, Jay F. Kunzler, Siddesh Pawar, Glen Labenski, Thomas Smith and Wayne H. Knox, Journal of The Optical Society of America B-Optical Physics Volume: 26 Issue: 9 Pages: 1679-1687 Published: SEP 1 2009

"Fabrication and Characterization of Fused Microfiber Resonators", Parama Pal and Wayne H. Knox, Photonics Technology Letters, vol. 21 issue 12, Page(s): 766-768 (2009).

"Micro-Raman spectroscopy of refractive index microstructures in silicone-based hydrogel polymers created by high-repetition-rate femtosecond laser micromachining,"  Li Ding,  Luiz Gustavo Cancado, Novotny, Wayne H Knox, Neil Anderson, Dharmendra Jani, Jeffrey Linhardt, Richard I Blackwell, Jay F Künzler, JOSA B, Vol. 26 Issue 4, pp.595-602 (2009)

"Low loss fusion splicing of micron scale silica fibers", Parama Pal, Wayne H Knox, Optics Express, Vol. 16 Issue 15, pp.11568-11573 (2008).

"Large enhancement of femtosecond laser micromachining speed in dye-doped hydrogel polymers", LiDing, DharmendraJani, JeffreyLinhardt, JayKünzler,  Siddhesh F Pawar, Glen Labenski, ThomasSmith, Wayne H Knox,  Optics Express, Vol. 16 Issue 26, pp.21914-21921 (2008).

“Intra-tissue Refractive Index Shaping (IRIS) of the cornea and lens using a low-pulse-energy femtosecond laser oscillator”, Li Ding, Wayne H Knox, Jens Buehren, Lana J Nagy, and Krystel R. Huxlin,  Invest. Ophthalmol. Vis. Sci.  doi:10.1167/iovs.08-1921 (July 18, 2008)

"Femtosecond laser micromachining of waveguides in silicone-based hydrogel polymers,"  Li Ding, Richard I. Blackwell, Jay F. Künzler, and Wayne H. Knox, Applied Optics, Vol. 47, Issue 17, pp. 3100-3108 (May 2008)

http://www.opticsinfobase.org/abstract.cfm?URI=ao-47-17-3100

"End-sealing short dispersion micromanaged tapered holey fibers by hole-collapsing,"  Parama Pal and Wayne H. Knox,  Optics Express, Vol. 15, Issue 21, pp. 13531-13538 (October 2007)

http://www.opticsinfobase.org/abstract.cfm?id=142522

 "Self referenced Yb-fiber-laser frequency comb using a dispersion micromanaged tapered holey fiber", Parama Pal, Wayne H. Knox, Ingmar Hartl, and Martin E. Fermann, Optics Express, Vol. 15, Issue 19, pp. 12161-12166 (September 2007)

http://www.opticsinfobase.org/abstract.cfm?id=141277

"Large refractive index change in silicone-based and non-silicone-based hydrogel polymers induced by femtosecond laser micro-machining", Li Ding, Richard Blackwell, Jay F. Kunzler, Wayne H. Knox, Optics Express, Vol. 14, Issue 24, pp. 11901-11909 (November 2006)

http://www.opticsinfobase.org/abstract.cfm?URI=oe-14-24-11901

"Generation, characterization, and application of broadband coherent femtosecond visible pulses in dispersion micromanaged holey fibers" Fei Lu, Wayne H. Knox JOSA B, Vol. 23, Issue 6, pp. 1221-1227 (June 2006)

http://www.opticsinfobase.org/abstract.cfm?id=90174

"Three-Dimensional Femtosecond Photochemical Etching in Silicon", Yujun Deng, Huimin Ouyang, Philippe M. Fauchet, Wayne H. Knox, CLEO Conference May 2006 paper CTuB2, publication in process.

"Low noise wavelength conversion of femtosecond pulses with dispersion micro-managed holey fibers," Fei Lu, Wayne Knox, Optics Express, Vol. 13, Issue 20, pp. 8172-8178, (October 2005)

http://www.opticsinfobase.org/abstract.cfm?URI=oe-13-20-8172

"Fiber-laser-based difference frequency generation scheme for carrier-envelope-offset phase stabilization applications", Yujun Deng, Fei Lu, Wayne H. Knox, Optics Express, Vol. 13 Issue 12 Page 4589 (June 2005)

http://www.opticsinfobase.org/abstract.cfm?id=84336

"Broadly tunable femtosecond parametric oscillator using a photonic crystal fiber", Yujun Deng, Qiang Lin, Fei Lu, Govind P. Agrawal, Wayne H. Knox , Optics Letters, Vol. 30 Issue 10 Page 1234 (May 2005)

Yujun Deng, Qiang Lin, Fei Lu, Govind P. Agrawal, Wayne H. Knox, 'Broadly tunable femtosecond parametric oscillator using a photonic crystal fiber", Optics Letters, Vol. 30 Issue 10 Page 1234 (May 2005)

F. Lu, Q. Lin, Wayne H. Knox, and Govind P. Agrawal "Vector Soliton Fission", Phys. Rev. Lett. 93, 183901 (2004)

Yujun Deng, Wayne H. Knox, "Self-starting passive harmonic mode-locked femtosecond Yb3+-doped fiber laser at 1030 nm", Optics Letters, Vol. 29 Issue 18 Page 2121 (September 2004)

Fei Lu Larry E. Foulkrod and Wayne H. Knox, "Intense Blue Continuum Generation in a short Dispersion-Micromanaged Holey Fiber", Postdeadline paper PD1, Nonlinear Optics Conference 2004, Waikoloa, Hawaii, August 2004.

Optics Express, Vol. 12 Issue 16 Page 3872 (August 2004)
 Yujun Deng, Wayne H. Knox, paper CThK2 "Self-starting passive harmonic modelocked femtosecond Yb3+-doped fiber laser at 1030nm" CLEO 2004 Conference, May 2004, San Fransicso, CA.

Fei Lu and Wayne H. Knox, paper JTuB6 "Generation of a broadband continuum with high spectral coherence in tapered single-mode optical fibers",  CLEO 2004 Conference , May 2004 San Francisco, CA .

Fei Lu, Wayne H. Knox, "Generation of a broadband continuum with high spectral coherence in tapered single-mode optical fibers", Optics Express, Volume 12, Issue 2, 347-353, January 2004

R. P. Prasankumar, Y. Hirakawa, A. M. Kowalevicz Jr., F. X. Kaertner, J. G. Fujimoto, and W. H. Knox, "An extended cavity femtosecond Cr:LiSAF laser pumped by low cost diode lasers," Opt. Express 11, 1265-1269 (2003), http://www.opticsexpress.org/abstract.cfm?URI=OPEX-11-11-1265

Lagatsky AA, Leburn CG, Brown CTA, Sibbett W, Knox WH. "Compact self-starting femtosecond Cr4+:YAG laser diode pumped by a Yb-fiber laser, Optics Communications, vol.217, no.1-6, 1 March 2003, pp.363-7. Publisher: Elsevier, Netherlands.

Liu X, Xu C, Knox WH, Man MF, "Characteristics of all-optical 2R regenerators based on self-phase modulation in high-nonlinear fibers", Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Conference Edition (IEEE Cat. No.02CH37337). Opt. Soc. America. Part vol.1, 2002, pp.612-13 vol.1. Washington, DC, USA.

Qinghao Ye, Xu C, Xiang Liu, Knox WH, Yan MF, Windeler RS, Eggleton B. Dispersion measurement of tapered air-silica microstructure fiber by white-light interferometry, Applied Optics, vol.41, no.22, 1 Aug. 2002, pp.4467-70. Publisher: Opt. Soc. America, USA.

Roth, J.A.; Dreyer, K.; Knox, W.H.; Bergman, K , "Actively mode-locked 1.5 microns 10-GHz picosecond fiber laser using a monolithic semiconductor optical amplifier/electroabsorption modulator" , IEEE Photonics Technology Letters, Volume: 14, Issue: 7, Jul 2002, Page(s): 917 –919

White, S.J.; Hopkins, J.-M.; Knox, W.H.; Miller, A. "Dual-wavelength, self-starting saturable Bragg reflector mode-locked Ti:sapphire laser" ,  Quantum Electronics, IEEE Journal of, Volume: 38 Issue: 3 , March 2002, Page(s): 246 –251.

W.H. Knox,  "Starting (and Managing) a Career in a Volatile Market" Optics and Photonics News, February 2002 Page: 17.

Xu, C.; Roth, J.M.; Knox, W.H.; Bergman, K , “Ultra-sensitive autocorrelation of 1.5 micron light with single photon counting silicon avalanche photodiode”, Electronics Letters , Volume: 38 Issue: 2 , 17 Jan. 2002 Page(s): 86 –88

Roth, J.M.; Bonadeo, N.H.; Bergman, K.; Knox, W.H., “Polarisation-maintaining, harmonically modelocked soliton fibre laser with repetition rate stabilisation using optical pumping of saturable Bragg reflector”, Electronics Letters , Volume: 38 Issue: 1 , 3 Jan. 2002, Page(s): 16 –17

Ye Q, Xu C, Liu X, Knox WH, Yan MF, Windeler RS, Eggleton BJ, "Dispersion measurement of tapered air-silica microstructure fiber by white-light interferometry", SPIE-Int. Soc. Opt. Eng. Proceedings of Spie - the International Society for Optical Engineering, vol.4579, 2001, pp.251-5. USA

White, S.J.; Hopkins, J.-M.; Knox, W.H.; Miller, A., “Dual-wavelength, self-starting saturable Bragg reflector mode-locked Ti:sapphire laser”, Quantum Electronics, IEEE Journal of , Volume: 38 Issue: 3 , March 2002 Page(s): 246 -251

X. Liu, C. Xu, W. H. Knox, J. K. Chandalia, B. J. Eggleton, S. G. Kosinski, R. S. Windeler, “Soliton self-frequency shift in a short tapered air silica microstructure fiber”, Optics Letters, Volume 26, Issue 6, 358-360 March 2001

N. H. Bonadeo, W. H. Knox, Jeffrey M. Roth, K. Bergman, “Passive harmonic mode-locked soliton fiber laser stabilized by an optically pumped saturable Bragg reflector”, Optics Letters, Volume 25, Issue 19, 1421-1423 October 2000.

B.C. Collings, M.L. Mitchell, L. Boivin, W.H. Knox, “A 1021 Channel WDM System”, Optics and Photonics News, 11, 31 (2000).

C. Xu, L.M.F. Chirovsky, W.S. Hobson, J. Lopata, W.H. Knox, J.E. Cunningham, W.Y. Jan, L.A. D’Asaro, “Two-Photon Photocurrent imaging of VCSELs”, Applied Physics Letters, 76, 1510 (2000).

B.C. Collings, W.H. Knox, S.T. Cundiff, N. Akhmediev, J. Soto-Crespo, K. Bergman, “Polarization-Locked Temporal Vector Solitons in a Fiber Laser: Experiment”, Journal of Optical Society of America: B17, 354 (2000).

J.M. Soto-Crespo, N.M. Akhmediev, B.C. Collings, S.T. Cundiff, K. Bergman, W.H. Knox, ““Polarization-Locked Temporal Vector Solitons in a Fiber Laser: Theory”, Journal of Optical Society of America: B17, 366 (2000).

S.T. Cundiff, B.C. Collings, L. Boivin, M.C. Nuss, K. Bergman, W.H. Knox, S. Evangelides, “Propagation of Highly Chirped Pulses in Fiber Optic Communications Systems”, Journal of Lightwave Technology 17, 811 (1999).

L. Boivin, M. Wegmuller, M.C. Nuss and W.H. Knox, “110 Channels x 2.35 Gb/s from a Single Femtosecond Laser”, IEEE Photonics Technology Letters 11, 466 (1999).

Leitenstorfer, S. Hunsche, J. Shah, M.C. Nuss, and W.H. Knox, “Detectors and sources for Ultrabroadband Electroptic Sampling: Experiment and Theory”, Applied Physics Letters, 74, 1516 (1999).

M. Koch, S.T. Cundiff, W.H. Knox, J. Shah, W. Stoltz, “Magnetoexciton quantum beats : influence of Coulomb correlations”, Solid State Communications, 111, 553 (1999).

S.T. Cundiff, B.C. Collings, N. Akhmediev, J. Soto-Crespo, K. Bergman, W.H. Knox, “Observation of Polarization Locked Temporal Vector Solitons in a Fiber Laser”, Physical Review Letters, 82, 3988 (1999).

A. Leitenstorfer, S. Hunsche, J. Shah, M.C. Nuss, W.H. Knox, “Femtosecond charge Transport in polar semiconductors”, Physical Review Letters 82, 5140 (1999).

S.T. Cundiff, M. Koch, J. Shah, W.H. Knox, W. Stoltz, “Coherent Excitation of Magnetoexciton Wavepackets”, Physica Status Solidi : B206, 77 (1998).

J.N. Kutz, B.C. Collings, K. Bergman, W.H. Knox, “Stabilized Pulse Spacing in Soliton Lasers due to Gain Depletion and Recovery”, IEEE Journal of Quantum Electronics 34, 1749 (1998).

K.W. Goossen, W.H. Knox, J.A. Walker and J.E. Ford, “Optical modulator with independent control of attenuation and spectral tilt”, IEEE/LEOS proc. II, 73 (1998).

N.N. Akhmediev, J.M. Soto-Crespo, S.T. Cundiff, B.C. Collings and W.H. Knox, “Phase-locking and periodic evolution of solitons in passively mode-locked fibers lasers with a semiconductor saturable absorber”, Optics Letters, 23, 852 (1998).

B.C. Collings, K. Bergman and W.H. Knox, “Stable multigigahertz pulse-train formation in a short-cavity passively harmonic mode-locked erbium/ytterbium fiber laser”, Optics Letters 23, 123 (1998)

L. Boivin, M. Wegmuller, M.C. Nuss, W.H. Knox, Y. Sun, A. Srivastava, J. Sulhoff, C. Wolf, “Transmission over 360 km of 110 channels at 2.35 Gb/s from a Spectrum-Sliced Modelocked Laser”, IEEE Photonics Technology Letters 11, 1319 (1998)

S.T. Cundiff, W.H. Knox, F.H. Baumann, K.W. Evans-Lutterodt and M.L. Green, “Second-harmonic generation at the interface between Si(100) and thin SiO2 layers”, J. Vac. Sci. Technology: A 16, 1730 (1998)

J. Nathan Kutz, B.C. Collings, K. Bergman and W.H. Knox, “Stabilized Pulse spacing in Soliton lasers due to gain depletion and recovery”, IEEE Journal of Quantum Electronics 34, 1749 (1998)

B.C. Collings, K. Bergman, S.T. Cundiff, S. Tsuda, J.N. Kutz, J.E. Cunningham, W.Y. Jan, M. Koch, W.H. Knox, “Short Cavity Erbium/Ytterbium Fiber Lasers Modelocked with a Saturable Bragg Reflector”, IEEE Journal of Selected Topics of Quantum Electronics, 3, 1065 (1997).

L. Boivin, M.C. Nuss, W.H. Knox, J.B. Stark, “206-Channel Chirped-Pulse Wavelength Division Multiplexed Transmitter”, Electronics Letters, 33, 827 (1997).

B.C. Collings, K. Bergman and W.H. Knox, “True Fundamental Solitons in a Passively Modelocked Short Cavity Cr4+:YAG Laser”, Optics Letters, 22, 1098 (1997).

A.T. Obeidat, W.H. Knox and J.B. Khurgin, “Effects of two-photon absorption in saturable Bragg reflectors used in femtosecond solid state lasers”, Optics Express 1, (1997).

J.B. Stark, M.C. Nuss, W.H. Knox, S.T. Cundiff, L. Boivin, S.G. Grubb, D. Tipton, D. Digiovanni, “Cascaded WDM Passive Optical Network with a Highly Shared Source”, IEEE Photonics Technology Letters 19, 1170 (1997).

S.T. Cundiff, W.H. Knox and M.C. Nuss, “Active feed-forward channel equalisation for chirped pulse wavelength division multiplexing”, Electronics Letters 33, 10 (1997).

S.T. Cundiff, W.H. Knox, F.H. Baumann, K.W. Evans-Lutterodt, M-T. Tang, M.L. Green and H.M. van Driel, “Si/SiO2 interface roughness: comparison between surface second harmonic generation and x-ray scattering”, Applied Physics Letters 70, 1414 (1997).

S. Tsuda, W.H. Knox and S.T. Cundiff, “High Efficiency Diode Pumping of a Saturable Bragg Reflector-Modelocked Cr:LiSAF Femtosecond Laser”, Applied Physics Letters 69, 1538 (1996).

K. Svoboda, W. Denk, W.H. Knox and S. Tsuda, “Two-Photon-Exciton Scanning Microscopy of Living neurons with a Saturable Bragg Reflector Modelocked diode-Pumped Cr:LiSAF Laser”, Optics Letters 21, 1411 (1996).

M.C. Nuss, W.H. Knox and U. Koren, “A scalable 32 channel chirped-pulse multifrequency WDM source”, Electronics Letters 32, 1311 (1996).

I.E. Perakis, I. Brener, W.H. Knox, and D. Chemla, “Nonlinear Optical Study of the Fermi Edge Singularity: Differences from Atomic Excitons in the Virtual Excitation Regime”, JOSA:B13, 1313 (1996).

S.T. Cundiff, M. Koch, W.H. Knox, J. Shah and W. Stolz, “Optical coherence in semiconductors: strong emission mediated by nondegenerate interactions”, Physical Review Letters 77, 1107 (1996).

S. Tsuda, W.H. Knox, S.T. Cundiff, W.Y. Jan and J.E. Cunningham, “Mode-locking Ultrafast Solid-State Lasers with Saturable Bragg Reflectors”, IEEE Journal of Selected Topics in Quantum Electronics 2, 454 (1996).

R.L. Morrison, S.G. Johnson, A.L. Lentine and W.H. Knox, “Design and demonstration of a high-speed, multichannel, optical-sampling oscilloscope”, Applied Optics 35, 1187 (1996).

B.C. Collings, J.B. Stark, S. Tsuda, W.H. Knox, J.E. Cunningham, W.Y. Jan, R. Pathak and K. Bergman, “Saturable Bragg reflector self-starting passive mode locking of a Cr4+:YAG laser pumped with a diode-pumped Nd:YVO4 laser”, Optics Letters 21, 1171 (1996).

S.T. Cundiff, W.H. Knox, E.P. Ippen and H.A. Haus, “Frequency-dependent mode size in broadband Kerr-lens mode locking”, Optics Letters 21, 662 (1996).

M. Fritze, A, Kastalsky, J.E. Cunningham, W.H. Knox, R.N. Pathak and I.E. Perakis, “Many-body and disorder effects in the optical spectra of extremely high density Be-delta doped GaAs”, Solid State Communications, 100, 97 (1996).

M. Fritze, I.E. Perakis, A. Getter, W.H. Knox, K.W. Goossen, J.E. Cunningham and S.A. Jackson, “Observation of a Magnetic-Field-Induced Transition in the Behavior of Extremely shallow Quantum Well Excitons”, Physical Review Letters 76, 106 (1996).

S.T. Cundiff, R. Hellman, M. Koch, G. Mackh, A. Waag, G. Landwehr, W.H. Knox and E.O. Gobel, “Excitonic dephasing in semimagnetic semiconductors”, JOSA B13, 1263 (1996).

S. Tsuda, W.H. Knox, E.A. deSouza, W.Y. Jan and J.E. Cunningham, “Low-loss intracavity AlAs/AlGaAs Saturable Bragg Reflector for femtosecond modelocking in solid state lasers”, Opt. Letters 20, 1406 (1995).

B.B. Hu, E.A. deSouza, W.H. Knox, J.E. Cunningham, M.C. Nuss, A.V. Kuznetsov and S.L. Chuang, “Identifying the distinct phases of carrier transport in semiconductors with 10 fs time resolution”, Physical Review Letters 74, 1689 (1995).

E.A. deSouza, W.H. Knox, M.C. Nuss and D.A.B. Miller, “Wavelength-division multiplexing with femtosecond pulses”, Opt. Letters 20, 1166 (1995).

I. Brener, W.H. Knox and W. Schaefer, “Virtual excitation of the Fermi Edge singularity in modulation-doped quantum wells”, Physical Review Letters B, 51, 2005 (1995).

T.K. Woodward, W.H. Knox, B. Tell, A. Vinattieri and M.T. Asom, “Experimental studies of proton-implanted GaAs-AlGaAs Multiple quantum well modulators for low-photocurrent applications”, IEEE J. Quantum Electron, 30, 2854 (1994).

D.R. Dykaar, S.B. Darack and W.H. Knox, “Cross-locking dynamics in a two-color modelocked-Ti:Sapphire laser”, Optics Letters 19, 1058 (1994).

W.H. Knox and J.P. Gordon, Frequency-domain dispersion measurements in tunable modelocked lasers”, JOSA B 10, 2071 (1993).

I. Brener, W.H. Knox, K.W. Goossen and J.E. Cunningham, “Shallow quantum well excitons: 2D or 3D?”, Physical Review Letters, 70, 319 (1993).

A. Partovi, A.M. Glass, D.H. Olson, G.J. Zydzik, H.M. O’Bryan, T.H. Chiu and W.H. Knox, “Chromium-doped GaAs/AlGaAs semi-insulating multiple quantum well photofrractive devices”, Applied Physics Letters, 62, 464 (1993).

A. Partovi, A.M. Glass, G.J. Zydzik, H.M. O’Bryan, T.H. Chiu, W.H. Knox, “Effect of carrier escape time on the performance of semi-insulating photorefractive self-electro-optic effect devices”, Applied Physics Letters, 62, 3088 (1993).

W.H. Knox and F.A. Beisser, “Two-wavelength synchronous generation of femtosecond optical pulses with <100 fs jitter”, Optics Letters 17, 1012 (1992).

W.H. Knox, “In-situ measurement of complete intracavity dispersion in an operating Ti:Sapphire femtosecond laser”, Optics Letters 17, 514 (1992).

T.K. Woodward, B.Tell, W.H. Knox, and J.B. Stark, “Suppressed photocurrent multiple quantum well modulators by proton implantation”, Applied Physics Letters 60, 742 (1992).

J.B. Stark, W.H. Knox, D.S. Chemla, “Spin-resolved femtosecond magnetoexciton interactions in GaAs”, Physical Review Letters: B 46, 7919 (1992).

W.Y. Jan, J.E. Cunningham, K.W. Goossen and W.H. Knox, “Growth of shallow AlGaAs/GaAs quantum wells by gas-source molecular beam epitaxy”, J. Vac. Sci. Technology: B 10, 972 (1992).

J.B. Stark, W.H. Knox and D.S. Chemla, “Femtosecond circular dichroism study of nonthermal carrier distributions in two-and zero-dimensional semiconductors”, Physical Review Letters 68, 3080 (1992).

P.C.M. Planken, M.C. Nuss, W.H. Knox, D.A.B. Miller and K.W. Goossen, “Terahertz pulses from the creation of polarized electron-hole pairs in biased quantum wells”, Applied Physics Letters 61, 2009 (1992).

W.H. Knox, G.E. Doran, M. Asom, G. Livescu, R. Leibenguth and S.N.G. Chu, “Low temperature grown GaAsquantum wells: femtosecond nonlinear optical and parallel-field transport studies”, Applied Physics

Letters 59, 1491 (1991).

W.H. Knox, G.E. Doran, J.E. Cunningam, M. Ranaswamy, S.M. Goodnick, “Femtosecond spatiotemporal field measurements in GaAs quantum wells”, OSA Proceedings on Picosecond Electronics and Optoelectronics, Vol. 9; Proceedings of the Topical Meeting Editor(s): Sollner, T.C.L.G.; Shah, J. (1991).

U. Keller, G.W. ‘tHooft, W.H. Knox and J.E. Cunningham, “Femtosecond pulses from a continuously self-stating passively modelocked Ti:Sapphire laser”, Optics Letters 16, 1022 (1991).

U. Keller, W.H. Knox, G.W. ‘tHooft, H. Roskos, T.K. Woodward, J.E. Cunningham, D.L. Sivco and A.Y. Cho,“Coupled-cavity resonant passive modelocked solid state lasers”, OSA Proceedings on advanced solid state lasers, vol. 10 p. 115. (1991).

H.A. Haus, U. Keller and W.H. Knox, “Theory of coupled-cavity modelocking with a resonant nonlinearity”, JOSA: B 8, 1252 (1991).

G. Hasnain, K.W. Goossen and W.H. Knox, “Effect of optical phonons on femtosecond pulse propagation in coplanar striplines”, Applied Physics Letters 56, 515 (1990).

J.B. Stark, W.H. Knox, D.S. Chemla, W. Schaefer, S. Schmitt-Rink and C. Stafford, “Femtosecond dynamics of excitons under extreme magnetic confinement”, Physical Review Letters 645, 3033 (1990).

D.D. Nolte, D.H. Olson, G.E. Doran, W.H. Knox and A.M. Glass, “Resonant photodiffractive effect in semi- insulating multiple quantum wells”, JOSA: B 7, 2217, (1990).

A.M. Glass, D.D. Notle, D.H. Olson, G.E. Doran, D.S. Chemla and W.H. Knox, “Resonant photodiffractive four-wave mixing in semi-insulating GaAs/AlGaAs quantum wells”, Optics Letters 15, 264 (1990).

W.H. Knox, “Femtosecond carrier dynamics in modulation-doped quantum wells”, Surface Science 229, 371 (1990).

U. Keller, W.H. Knox and H. Roskos, “Coupled-cavity resonant passive mode-locked Ti:Sapphire laser”, Optics Letters 15, 60 (1990).

S. Schmitt-Rink, D.S. Chemla, W.H. Knox, D.A.B. Miller, “How fast is excitonic electroabsorption?”, Optics Letters 15, 60 (1990).

G. Livescu, M. Angell, J. Filipe and W.H. Knox, “A Real-time photoluminescence imaging system”, J. Electronic Matierials 19, 937 (1990).

W.H. Knox, J.E. Henry, K.W. Goossen, K.D. Li, B. Tell, D.A.B. Miller, D.S. Chemla, A.C Gossard, J. English and S. Schmitt-Rink, “Femtosecond excitonic optoelectronics”, IEEE J. Quantum Electronics 25, 2586 (1989).

W.H. Knox, D.S. Chemla, D.A.B. Miller, J.B. Stark and S. Schmitt-Rink, “Femtosecond AC Stark effect in semiconductor quantum wells; extreme low and high intensity limits”, Physical Review Letters 62, 1189 (1989).

K.D. Li, W.H. Knox and N.M. Pearson, “Broadband cubic phase compensation with resonant Gires-Tournois interferometers”, Optical Letters 14, 450 (1989).

G. Livescu, A.M. Fox, D.A.B. Miller, T. Sizer, W.H. Knox, A.C. Gossard and J.H. English, “Resonantly enhanced electron tunneleing rates in quantum wells”, Physical Review Letters 63, 438 (1989).

W.H. Knox, N.M. Pearson, K.D. Li and C.A. Hirlimann, “Interferometric measurements of femtosecond group delay in optical components”, Optical Letters 13, 574 (1988).

O.R. Wood, W.T. Silfvast, H.W.K. Tom, W.H. Knox, R.L. Fork, C.H. Brito-Cruz, M.C. Downer, and P.J. Maloney, “Effect of laser pulse duration on short wavelength emission from femtosecond and picosecond laser-produced Ta plasmas”, Applied Physics Letters 53, 654 (1988).

W.H. Knox, D.S. Chemla, G. Livescu, J.E. Cunningham and J.E. Henry, “Femtosecond carrier thermalization in dense Fermi seas”, Physical Review Letters 61, 1290 (1988).

W.H. Knox, “Generation and kilohertz-rate amplification of femtosecond optical pulses around 800 nm”, JOSA: B 4, 1771 (1987).

W.J. Tomlinson and W.H. Knox, “Limits of fiber-grating optical pulse compression”, JOSA: B 4, 1404 (1987).

W.H. Knox, C. Hirlimann, D.A.B. Miller, J. Shah, D.S. Chemla and C.V. Shank, “Femtosecond excitation of nonthermal carrier populations in GaAs quantum wells”, Physical Review Letters 56, 1191 (1986).

C.V. Shank, R.L. Fork, C.H. Brito-Cruz and W.H. Knox, “Investigations of nonthermal population distributions with 10 fs optical pulses”, Ultrafast Phenomena V, Springer Verlag, NY (1986).

W.H. Knox, D.A.B. Miller, T.C. Damen, D.S. Chemla, C.V. shank and A.C. Gossard, “Subpicosecond excitonic electroabsorption in room-temperature quantum wells”, Applied Physics Letter 48, 864 (1986).

C.H. Brito-Cruz, R.L. Fork, W.H. Knox and C.V. Shank, “Spectral hole burning in large molecules probed with 10 fs optical pulses”, Chem. Physics Letters 132, 341 (1986).

W.H. Knox, L.F. Mollenauer and R.L. Fork, “Femtosecond vibrational relaxation of the F2+ center in LiF”, Ultrafast Phenomena V, Springer Verlag, NY 277 (1986).

B. Wittmershaus, T.M. Nordlund, W.H. Knox, R.S. Knox, N. Geacintov and J. Breton, “Picosecond studies at 77K of energy transfer in chloroplasts at low and high exciton intensities”, BBA 806, 93 (1985).

W.H. Knox, “Picosecond vibrational dynamics of O2- in alkali halide hosts”, Il Nuovo Cimento Suppl., Proc. of Enrico Fermi Summer School Corso XCVI, Varenna Italy (1985).

W.H. Knox, R.L. Fork, M.C. Downer, D.A.B. Miller, D.S. Chemla, C.V. Shank, A.C. Gossard, and W. Weigmann, “Femtosecond dynamics of resonantly excited excitons in room-temperature GaAs quantum wells” Physical Review Letters 54, 1306 (1985).

W.H. Knox, R.L. Fork, M.C. Downer, R.H. Stolen, C.V. Shank and J.A. Valdmanis, “Optical pulse compression to 8fs at a 5-kHz repetition rate”, Applied Physical Letters 46, 1120 (1985). (Citation Classic Publication)

W.H. Knox, M.C. Downer, R.L. Fork and C.V. Shank, “Amplified femtosecond optical pulses and continuum generation at 5-kHz repetition rate”, Optics Letters 9, 552 (1984).

W.H. Knox, R.L. Fork, M.C. Downer, D.A.B. Miller, D.S. Chemla, C.V. Shank, A.C. Gossard and W. Weigmann, “Femtosecond exciton ionization in room-temperature GaAs quantum wells”, Ultrafast Phenomena IV, Springer-Verlag NY p. 162 (1984).

W.H. Knox and K.J. Teegarden, “Picosecond time-resolved spectroscopic study of vibrational relaxation processes in alkali halides”, J. Luminescence 31, 39 (1984).

D.V. Brumbaugh, A.A. Muenter, W.H. Knox, G.A. Mourou and B. Wittmershaus, “Singlet exciton annihilation in the picosecond fluorescence decay of 1-1-diethyl-2,2’-cyanine chloride dye J-aggregate”, J. Luminescence 31/32, 783 (1984).

C.A. Hanzlik, W.H. Knox, T.M. Nordlund, R. Hilf and S.L. Gibson, “Picosecond fluorescence of hematoporphyrin derivative, its components, and related porphyrins”, in Porphyrin Localization and Treatment of Tumors, Proc. 1983 Clayton Symposium, 201 (1983).

J.R. Andrews, T.E. Orlowski, H. Gibson, M. Slade, W.H. Knox and B. Wittmershaus, “Hot luminescence in trans-polyacetylene: a picosend time-resolved study”, Physical Review Letters: B 27, 6545 (1983).

D. Magde, M. Zappala, W.H. Knox, T.M. Nordlund, “Picosecond Fluorescence anisotropy decay in the Ethidium/DNA Complex”, J. Phys. Chem. 81, 3286 (1983).

B.A. Weinstein, T.E. Orlowski, W.H. Knox, T.M. Nordlund, “Picosecond radiative and non radiative processes in As2S3 glass”, Physics B & C 117/118B + C, 977 (1983).

B.A. Weinstein, T.E. Orlowski, W.H. Knox, T.M. Nordlund, G.A. Mourou, “Picosecond luminescence and competing nonradiative processes in As2S3 glass”, Physical Review Letters: B 26, 4777 (1982).

R. Anderson and W.H. Knox, “Time resolved fluorescence decay in phthalazine”, J. Luminescence 24/25, 647 (1981).

T.M. Nordlund and W.H. Knox, “Lifetime of fluorescence from light-harvesting chlorophyll a/b proteins: excitation intensity dependence”, Biophys. Journal 36, 193 (1981).

W.H. Knox and G.A. Mourou, “A simple jitter-free streak camera”, Opt. Comm. 37, 203 (1981).

M. Stavola, G. Mourou and W. Knox, “Picosecond time-delay fluorometry using a jitter-free streak camera”, Opt. Comm. 34, 404 (1980).

G. Mourou and W. Knox, “High power switching with picosecond precision”, Applied Physics Letters 35, 492 (1979).

G. Mourou and W. Knox, “A simple jitter-free streak camera”, Applied Physics Letters 36, 623 (1979).

Other

W.H. Knox, R.S. Knox, J.F. Hoose and R.N. Zare, “Observation of the 0 fs pulse” Optics and Photonics News, April 1, 1990.

 

Invited Review Articles

W.H. Knox, “Dispersion measurements for femtosecond pulse generation and applications”, Applied Physics Letters: B 58, 225 (1994).

W.H. Knox, “The Revolution in femtosecond near-infrared pulse generation”, Optics and Photonics News, p. 10 May 1992

U. Keller, W.H. Knox and G.W. ‘tHooft, “Ultrafast solid state modelocked lasers using resonant nonlinearities”, IEEE J. Quantum Electronics 28, 2123 (1992).

W.H. Knox, “Quantum wells for femtosecond optoelectronics applications”, Applied Physics: A 53, 503 (1991).

S. Schmitt-Rink, J.B. Stark, W.H. Knox, D.S. Chemla and W. Schaelfer, “Optical properties of quasi-zero dimensional magneto-excitons”, Applied Physics: A 53, 491 (1991).

D.S. Chemla, S. Schmitt-Rink, W.H. Knox, D.A.B. Miller, K.W. Goossen and G. Hasnain, “Ultrafast nonlinear optical effects in biased semiconductor quantum wells”, Phys. Stat. Sol. (b) 159, 11 (1990).

W.H. Knox, “Femtosecond bandedge excitations in modulation-doped quantum wells”, Solid State Electronics 32, 1057 (1989).

W.H. Knox, “Femtosecond optical pulse amplification”, IEEE J. Quantum Electron. 24, 388 (1988).

D.S. Chemla, W.H. Knox, D.A.B. Miller, S. Schmitt-Rink, J.B. Stark and R. Zimmermann, “The excitonic optical stark effect in semiconductor quantum wells probed with femtosecond optical pulses”, J. Luminescence 44, 233 (1989).

G. Mourou, W. Knox and S. Williamson, “Applications of picosecond high power switching”, Picosecond Optical Devices, Ed. Chi Lee, Academic Press, NY 219 (1984).

W. Knox, G. Mourou and T.M. Nordlund, “Applications of the jitter-free signal averaging streak camera in solid state physics, biophysics and chemistry”, Applied Physics: B 28, 174 (1984).

W. Knox, S. Williamson and G. Mourou, “Applications of streak cameras”, Semiconductors probed by ultrafast phenomena, Ed. R.R. Alfano, Academic Press, NY 459 (1984).

G. Mourou, W.H. Knox and S. Williamson, “Advances in picosecond optoelectronics”, Proc. SPIE 322, 107 (1982).

 

Book chapters

R.S. Knox and W.H. Knox, “Excitons”, Encyclopedia of Applied Physics, Vol. 6, p. 311 (1993).

W.H. Knox, “Optical Studies of femtosecond carrier thermalization in GaAs”, Hot Carriers in semiconductor nanostructures, Ed. J. Shah, Academic Press p. 313 (1992).

 

 

Editorships

P.F. Barbara, W.H. Knox, G. Mourou and A.H. Zewail, Editors of Proceedings of Ultrafast Phenomena Conference 1994, Springer-Verlag Series in Chemical Physics, Heidelberg, Helmut Lotsch, Series Editor.

P.F. Barbara, W.H. Knox, J.G. Fujimoto and W. Zinth, Editors of Proceedings of Ultrafast Phenomena Conference 1996, Springer-Verlag Series in Chemical Physics, Heidelberg, Helmut Lotsch, Series Editor.

J.E.Bowers and W.H. Knox, Editors of OSA TOPS volume, proceedings of the 1999 Ultrafast Electronics and Optoelectronics Conference.

 

 

 
 

 

 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

This site was last updated 01/02/16