Event Details

We will discuss arbitrary optical waveform generation (OAWG) that allows synthesis of any waveforms of any modulation formats scalable to Thz and beyond, and arbitrary optical waveform measurement (OAWM) that allows measurements of the Thz bandwidth optical arbitrary waveform with infinite record lengths. The OAWG chip consists of an array of amplitude and phase (I/Q) modulators placed between a pair of high-resolution demultiplexer and modulator pair. By using coherent optical frequency combs (e.g. optical subcarriers or mode-locked laser sources) and modulating the phase and amplitude of each comb line, the integrated OAWG chip can generate a waveform of arbitrary shape in amplitude and phase of any lengths. Even with limited (<10 GHz) electronic bandwidth of the modulators, scalable (>THz) waveform generation is possible. Similarly, OAWM chip with a similar architecture involving I/Q receivers allow measurements of arbitrary THz bandwidth optical waveforms. Modulation format and bandwidth agile transmitters and receivers for 5G/6G as well as EW and LiDAR microsystems can be realized using this technique.

October 17, 2025

Join Zoom Webinar

Host: Steve Crago
POC: Amy Kasmir

Speaker Bio

S. J. Ben Yoo is a Distinguished Professor at the University of California at Davis (UC Davis). His research at UC Davis includes 2D/3D photonic integration for AI and neuromorphic computing, 5G/6G networking, RF-Photonic arbitrary waveform generation, LiDAR, EW, and the future Internet. He is currently leading 3DEPIC_AI project at the Northwest-AI-Hub under the DoD MEC program support. Prior to joining UC Davis in 1999, he was a Senior Research Scientist at Bellcore, leading technical efforts in integrated photonics, optical networking, and systems integration. His research activities at Bellcore included the next-generation Internet, reconfigurable multiwavelength optical networks (MONET), wavelength interchanging cross connects, wavelength converters, vertical-cavity lasers, and high-speed modulators. Prof. Yoo received his BS’84, MS’86, PhD’91, all from Stanford University, and is a Fellow of IEEE and OPTICA. He is a recipient of the DARPA Award for Sustained Excellence, the Bellcore CEO Award, the Mid-Career Research Faculty Award (UC Davis), the Senior Research Faculty Award (UC Davis), and numerous best paper awards from IEEE, ACM, and Optica conferences.