Abstract
Broadband, coherent narrow-linewidth optical frequency synthesis is of crucial importance in dual-comb interferometric measurement. Here we present a detailed description of the construction and performance characterization of a hertz-level linewidth coherent optical frequency synthesizer across the optical telecommunication band. A narrow-linewidth cavity-stabilized laser at 1565.00 nm is built and coherently transferred through a fiber link with an additional fractional frequency instability of ${2.0} \times {{10}^{- 16}}$ at 1 s averaging time. Broadband, coherent optical frequency synthesis is then achieved by steering one mode of a laser frequency comb with the transferred optical frequency oscillation. By beating with a 1542.14 nm ultra-stable cavity-stabilized laser, the evaluated fractional frequency stability and absolute linewidth of the nearest synthesized optical oscillation are ${3.5} \times {{10}^{- 15}}$ at 1 s averaging time and 1.8 Hz, respectively. According to the ultra-low-noise feature of the utilized laser frequency comb of ${4.7} \times {{10}^{- 17}}$ at 1 s averaging time, the synthesized optical frequency oscillations could maintain the high coherence across the comb’s output bandwidth.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Yuan Yao, Bo Li, Guang Yang, Xiaotong Chen, Yaqin Hao, Hongfu Yu, Yanyi Jiang, and Longsheng Ma
Photon. Res. 9(2) 98-105 (2021)
Yoshiaki Nakajima, Hajime Inaba, Kazumoto Hosaka, Kaoru Minoshima, Atsushi Onae, Masami Yasuda, Takuya Kohno, Sakae Kawato, Takao Kobayashi, Toshio Katsuyama, and Feng-Lei Hong
Opt. Express 18(2) 1667-1676 (2010)
Hajime Inaba, Kazumoto Hosaka, Masami Yasuda, Yoshiaki Nakajima, Kana Iwakuni, Daisuke Akamatsu, Sho Okubo, Takuya Kohno, Atsushi Onae, and Feng-Lei Hong
Opt. Express 21(7) 7891-7896 (2013)