Narrow-linewidth and highly stable optical frequency comb realized with a simple electro-optic modulator system in a mode-locked Er:fiber laser. (4th February 2019)

• Record Type: Journal Article
• Authors: Asahina, Yu; Yoshii, Kazumichi; Yamada, Yuko; Hisai, Yusuke; Okubo, Sho; Wada, Masato; Inaba, Hajime; Hasegawa, Takemi; Yamamoto, Yoshinori; Hong, Feng-Lei
• Is Part Of: Japanese journal of applied physics. Volume 58:Number 3(2019)
• Publication Date: 2019-02-04
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/1347-4065/aafb2a
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We demonstrate a mode-locked Er:fiber laser with a compact fiber-pigtailed optical bench containing a free-space electro-optic modulator for high-speed feedback control. The achieved servo bandwidth of the beat frequency between a given comb component and a reference laser is approximately 850 kHz. The realization of a narrow-linewidth and highly stable frequency comb is confirmed by measuring both in-loop and out-of-loop beat frequencies. We also demonstrate the frequency measurement of two iodine-stabilized Nd:YAG lasers through the narrow-linewidth comb without stability degradation. The developed optical frequency comb can work continuously for weeks without maintenance.