Abstract

We propose a novel structure of fiber laser to achieve single-frequency and polarization-stable oscillation without using a polarization-maintaining (PM) active fiber. The proposed structure has two stabilization mechanisms. First, the laser has a Fabry-Perot cavity composed of Faraday-rotator mirrors (FRM's) to stabilize the polarization-mode competition. We make comparison of polarization-mode stability in various types of cavity structure, and confirm that the Fabry-Perot cavity composed of a non-PM fiber and FRM's has ideal stability similar to the ring cavity composed of a PM fiber and a polarizer. Second, in order to stabilize the longitudinal mode, the laser has an intracavity etalon specially designed to maximize its finesse by removing undesired reflections from the etalon. In the experiment, we construct a fiber laser composed of a non-PM erbium-doped fiber (EDF), FRM's, and an intracavity Fabry-Perot etalon. The polarization-stable and single-frequency operation of the laser is demonstrated.

[IEEE ]

Polarization- and frequency-stable fiber laser for magnetic-field sensing

Jin Sik Park, Seok Hyun Yun, Seong Joon Ahn, and Byoung Yoon Kim
Opt. Lett. 21(14) 1029-1031 (1996)

1.5  μm polarization-maintaining dual-wavelength single-frequency distributed Bragg reflection fiber laser with 28  GHz stable frequency difference

Yubin Hou, Qian Zhang, Shuxian Qi, Xian Feng, and Pu Wang
Opt. Lett. 43(6) 1383-1386 (2018)

Stable actively Q-switched single-frequency fiber laser at 1.5 μm based on self-injecting polarization modulation

Q. Zhao, Z. Wu, Z. Zhang, W. Lin, C. Li, X. Guan, T. Tan, C. Yang, H. Cheng, J. Gan, Z. Feng, M. Peng, Z. Yang, and S. Xu
Opt. Express 26(13) 17000-17008 (2018)

Stable single-polarization single-longitudinal-mode linear cavity erbium-doped fiber laser based on structured chirped fiber Bragg grating

Bin Yin, Zhibo Liu, Suchun Feng, Yunlong Bai, Haisu Li, and Shuisheng Jian
Appl. Opt. 54(1) 6-11 (2015)

Four watt long-term stable intracavity frequency-doubling Nd:YVO₄ laser of single-frequency operation pumped by a fiber-coupled laser diode

Yaohui Zheng, Huadong Lu, Fengqin Li, Kuanshou Zhang, and Kunchi Peng
Appl. Opt. 46(22) 5336-5339 (2007)