Simultaneously improving the linewidth and the low-frequency relative intensity noise of a single-frequency fiber laser. (26th April 2019)

• Record Type: Journal Article
• Authors: Wu, Zisheng; Zhao, Qilai; Yang, Changsheng; Zhou, Kaijun; Lin, Wei; Guan, Xianchao; Li, Can; Tan, Tianyi; Feng, Zhouming; Yang, Zhongmin; Xu, Shanhui
• Is Part Of: Applied physics express. Volume 12:Number 5(2019)
• Publication Date: 2019-04-26
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/ab182a
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: By optimizing the pump intensity noise, simultaneous improvements in the linewidth and the low-frequency (<20 kHz) relative intensity noise (RIN) of a 1550 nm single-frequency fiber laser (SFFL) are demonstrated. A lower-RIN distributed feedback laser diode with optoelectronic feedback replaces the fiber Bragg grating laser diode to pump the SFFL. As a result, the linewidth of the SFFL is narrowed from 1.3 to 0.65 kHz and the RIN is decreased by about 7– 11.5 dB from 0.2 to 5 kHz, and by about 3–7 dB from 5 to 10 kHz. The improved SFFL is an ideal laser source for fiber-optic sensing applications.