Abstract

We stabilized the repetition rate of an optical frequency comb using a self-referenced phase-locked loop. The phase-locked loop generated its error signal with a fiber-optic delay-line interferometer that had a path-length difference of 8 m. We used the stabilized repetition rate to generate a 10 GHz signal with a single-sideband phase noise that was limited by environmental noise to $-120\mathrm{dBc}/\mathrm{Hz}$ at an offset frequency of 1 kHz. Modeling results indicate that thermoconductive noise sets a fundamental phase noise limit for an 8 m interferometer of $-152\mathrm{dBc}/\mathrm{Hz}$ at a 1 kHz offset frequency. The short length of the interferometer indicates that it could be realized as a photonic integrated circuit, which may lead to a chip-scale stabilized optical frequency comb with an ultralow-phase-noise repetition rate.

© 2017 Optical Society of America

All-fiber interferometer-based repetition-rate stabilization of mode-locked lasers to 10⁻¹⁴-level frequency instability and 1-fs-level jitter over 1  s

Dohyeon Kwon and Jungwon Kim
Opt. Lett. 42(24) 5186-5189 (2017)

Simple and seamless broadband optical frequency comb generation using an InAs/InP quantum dot laser

Li Liu, Xiupu Zhang, Tiefeng Xu, Zhenxiang Dai, Shixun Dai, and Taijun Liu
Opt. Lett. 42(6) 1173-1176 (2017)

Ultra-low noise microwave generation with a free-running optical frequency comb transfer oscillator

Pierre Brochard, Stéphane Schilt, and Thomas Südmeyer
Opt. Lett. 43(19) 4651-4654 (2018)

300 GHz wave generation based on a Kerr microresonator frequency comb stabilized to a low noise microwave reference

Tomohiro Tetsumoto, Fumiya Ayano, Mark Yeo, Julian Webber, Tadao Nagatsuma, and Antoine Rolland
Opt. Lett. 45(16) 4377-4380 (2020)

Ultrabroadband out-of-loop characterization of the carrier-envelope phase noise of an offset-free Er:fiber frequency comb

Andreas Liehl, David Fehrenbacher, Philipp Sulzer, Alfred Leitenstorfer, and Denis V. Seletskiy
Opt. Lett. 42(10) 2050-2053 (2017)