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Jan 22 (Wed) @ 9:00am: "Low-noise Lasers and Oscillators in Ultra-high-Q Heterogeneous Silicon Nitride Photonics," Joel Guo, ECE PhD Defense

Date and Time

Location: Henley Hall 1010 (HH), Room 1010
Zoom Meeting: https://ucsb.zoom.us/j/83747644882?pwd=czSMJMcTh3gK6pPQz6aXTzJsRemrnl.1
Research Areas: Electronics & Photonics

Abstract

Silicon nitride photonics enables powerful functionality beyond traditional silicon photonics interconnects markets. However, to leverage the high-volume manufacturing and economics of semiconductor processing, heterogeneous integration of lasers, modulators, and detectors with silicon nitride photonics is necessary. In this thesis, low-noise silicon nitride lasers and microwave oscillators are demonstrated with performance rivaling expensive, table-top bulk optics. Degradation and recovery of silicon nitride resonator Qs over 100 million from heterogeneous laser integration is characterized, resulting in laser-integrated Kerr combs and record low-noise self-injection-locked lasers. Lastly, heterogeneously integrated EO modulators and high-speed MUTC detectors are fabricated and characterized towards a PDH-locking low-noise microwave oscillator PIC. 

Bio

Joel Guo is a Ph.D. candidate in the ECE department at UCSB, advised by Professor John Bowers. He received his B.S. in ECE from UT Austin in 2018 and his M.S. in ECE from UCSB in 2020. 

Hosted By: Professor John Bowers

Submitted By: Joel Guo <joelguo@ucsb.edu>