Self-referenced laser frequency comb using analog feed-forward carrier-envelope phase stabilization
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Updated: Nov 1, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Gregory Sercel1,2,3, Mirali Seyed Shariatdoust1,2, Yichen Zou1,2
1Department of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
Abstract:
We demonstrate a self-referenced optical frequency comb based on feed-forward carrier-envelope offset (CEO) stabilization, overcoming bandwidth limitations imposed by gain dynamics in traditional pump-current feedback schemes. Our system eliminates the need for external radio-frequency references while enabling tunable, non-zero CEO frequency. We achieve an integrated CEO phase noise of 53.1 mrad from 10 Hz to 1 MHz. The repetition rate is stabilized by phase-locking an optical beat to a continuous-wave reference. Using Allan statistics, we compare our system to a conventional feedback-locked comb. The feed-forward system exhibits superior short-term stability, but long-term stability is limited by fiber noise in the inherently out-of-loop feed-forward system.
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