Skip to main content


Colloquia & Guest Speakers


Chip-Based Optical Frequency

Alex Gaeta, Cornell University

Friday, March 27, 2015
2:45 p.m.–3:45 p.m.
Lander Auditorium, 140 Hutchison Hall


Optical frequency combs are having and will have enormous impact on many areas of science and technology, including time and frequency metrology, precision measurement, telecommunications, and astronomy.  I will describe our recent research on a novel type of frequency comb that is based on parametric nonlinear optical processes in silicon-based microresonators.  The dynamical behavior of how combs are generated in such a system is complex and include phase transitions, mode locking and synchronization, and femtosecond pulse generation.  Ultimately, such chip-based combs offer great promise for creating devices that are highly integrated and stable and can operate from the visible to mid-infrared regimes.


After receiving his doctoral degree in optics, Gaeta remained at the University of Rochester for two years as a postdoctoral research associate. He joined the Cornell faculty in 1992. He received Young Investigator Awards from the Office of Naval Research in 1993, and from the Army Research Office in 1995. He was a recipient of the College of Engineering Teaching Award in 1997, 2000, 2003, and 2007. He is a fellow of the Optical Society of America and of the American Physical Society. Gaeta has served as director of the Center for Nanoscale Systems from 2007-2012.

Research Interests

Ultrafast nonlinear optics, nanophotonics, nonlinear propagation in fibers and bulk media, photonic crystal fibers, coherent interactions of laser light with matter, the generation of non-classical light fields, stimulated scattering processes.