• Chinese Optics Letters
  • Vol. 20, Issue 2, (2022)
Wang Kai, Tian Haochen, Meng Fei, Lin Baike, Cao Shiying, Pi Yihan, Han Yan, Fang Zhanjun, Song Youjian, Hu Minglie
Author Affiliations
  • Tianjin University
  • National Institute of Metrology PR China
  • 中国计量科学研究院
  • Taiyuan University of Technology
  • 北京 北三环东路18号 中国计量科学研究院量子部
  • 天津大学精密仪器与光电子工程学院超快激光研究室
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    Abstract

    We demonstrate the stabilization of optical frequency combs (OFCs) using a segment of fiber delay line as reference. An Er-doped fiber mode-locked laser is phase locked to a kilometer-long fiber delay line using three different schemes. The short-term stability of the comb modes in the OFC stabilized by these schemes are obviously enhanced, down to 10<sup>-12</sup> level at millisecond average time. Among these three schemes, phase locking two bunches of comb modes in the OFC to the same fiber delay line exhibits the lowest residual phase noise. Fiber-delay-line-referenced optical frequency combs can provide reliable laser sources in precise metrology owing to its advances of low-cost, compactness and highly-integration.
    Manuscript Accepted: Nov. 18, 2021
    Posted: Nov. 19, 2021