A low phase noise high-power Er-fiber frequency comb locked by the 18th harmonic

Mingkun Li; Xiguang Yang; Bingjie Rao; Lulu Yan; Xin Chen; Yanyan Zhang; Pan Zhang; Tao liu; Shougang Zhang

doi:10.1117/12.2690926

6 November 2023 A low phase noise high-power Er-fiber frequency comb locked by the 18th harmonic

Mingkun Li, Xiguang Yang, Bingjie Rao, Lulu Yan, Xin Chen, Yanyan Zhang, Pan Zhang, Tao liu, Shougang Zhang

Proceedings Volume 12921, Third International Computing Imaging Conference (CITA 2023); 129212O (2023) https://doi.org/10.1117/12.2690926
Event: Third International Computing Imaging Conference (CITA 2023), 2023, Sydney, Australia

Abstract

We demonstrate a low phase noise all Polarization-Maintaining (PM) Er-fiber Optical Frequency Comb (OFC), which uses the 18th harmonic of the repetition rate for tight phase locking to synchronize it to the Hydrogen Maser Clock (HMC). The phase noise of the OFC is -96 dBc/Hz at 1Hz offset, and the corresponding RMS timing jitter of the repetition rate is 62 fs (1 Hz ~ 1 MHz). The residual frequency instability of the repetition rate (200 MHz) is 1.46x10^-14@1s, and the residual phase noise of the OFC (normalized to 10 MHz) is -138 dBc/Hz at 1 Hz offset and declines to about -160 dBc/Hz at the far-end, much lower than that of the reference HMC of the phase locking. (-122 dBc/Hz at 1 Hz and -156 dBc/Hz at the far-end).

Citation Download Citation

Mingkun Li, Xiguang Yang, Bingjie Rao, Lulu Yan, Xin Chen, Yanyan Zhang, Pan Zhang, Tao liu, and Shougang Zhang "A low phase noise high-power Er-fiber frequency comb locked by the 18th harmonic", Proc. SPIE 12921, Third International Computing Imaging Conference (CITA 2023), 129212O (6 November 2023); https://doi.org/10.1117/12.2690926

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KEYWORDS

Frequency combs

Mode locking

Laser frequency

Repetition frequency

Microwave radiation

Laser stabilization

Clocks

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