Author(s): Wang, T (Wang, Ting); Wu, JL (Wu, Jiliang); Yang, YD (Yang, Yuede); Xiao, JL (Xiao, Jinlong); Huang, YZ (Huang, Yongzhen)

Source: JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 56 Issue: 5 Article Number: 054003 DOI: 10.1088/1361-6463/acae2f Published: FEB 2 2023

Abstract: A highly coherent optical frequency comb (OFC) based on spectral broadening of a phase-locked dual-wavelength microcavity laser is presented. By directly modulating the microcavity laser to generate multiple sidebands, the cross-injection locking of the dual modes is achieved and the beat-signal linewidth is improved from 13.5 MHz to less than 100 Hz. Subsequently, 21 flat comb teeth in a +/- 3 dB power variation are achieved by combining a phase modulator. Finally, an OFC with a bandwidth of 16 nm is successfully realized by narrowing the optical pulse and spectral broadening in a commercial nonlinear optical fiber. The repetition rate has a low phase noise of -102 dBc Hz(-1) at 10 kHz offset, demonstrating the generated OFC has a high degree of coherence.

Accession Number: WOS:000916763900001

ISSN: 0022-3727

eISSN: 1361-6463

Full Text: https://iopscience.iop.org/article/10.1088/1361-6463/acae2f