All-fiber linearly polarized laser oscillator by fiber coiling loss control

doi:10.1088/1674-1056/27/4/044201

Abstract In this paper, we demonstrate an all-fiber linearly polarized fiber laser oscillator. The single polarization of the oscillator is achieved through the careful designing of the active fiber coiling. The relationship between fiber coiling diameter and polarization extinction ratio and optical efficiency is studied, whose results lead to an optimized system. The thermal management of the oscillator is also refined, which allows the oscillator to reach a maximum output power of 44.1 W with an optical-to-optical efficiency of 57.9%. A high average polarization extinction ratio of 21.6 dB is achieved during a 2-hour stability test. The oscillator also owns a narrow 3-dB bandwidth of 0.1 nm, as well as near-diffraction-limit beam quality of M²~1.14.

Keywords: fiber laser oscillator linearly polarized all-fiber

Received: 07 November 2017
Revised: 19 November 2017
Accepted manuscript online:

PACS:	42.55.Wd	(Fiber lasers)
	42.25.Ja	(Polarization)

Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2017YFB1104500), the National Natural Science Foundation of China (Grant No. 61675114), and theTsinghua University (THU) Initiative Scientific Research Program, China (Grant No. 20151080709).

Corresponding Authors: Qi-Rong Xiao
E-mail: xiaoqirong@mail.tsinghua.edu.cn

Cite this article:

Yu-Sheng Huang(黄昱升), Qi-Rong Xiao(肖起榕), Dan Li(李丹), Ze-Hui Wang(王泽晖), Xue-Jiao Wang(王雪娇), Ping Yan(闫平), Ma-Li Gong(巩马理) All-fiber linearly polarized laser oscillator by fiber coiling loss control 2018 Chin. Phys. B 27 044201

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