Open AccessHigh-efficiency sub-watt in-band-pumped single-frequency DBR Tm3+-doped germanate fiber laser at 1950 nm
Author(s) -
Xianchao Guan,
Changsheng Yang,
Tian Qiao,
Wei Lin,
Qilai Zhao,
Guowu Tang,
Guoquan Qian,
Qi Qian,
Zhongmin Yang
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.006817
Subject(s) - materials science , optics , fiber laser , laser , slope efficiency , laser power scaling , optoelectronics , fiber bragg grating , relative intensity noise , optical fiber , single mode optical fiber , semiconductor laser theory , physics
Based on a 1.8-cm-long heavily Tm 3+ -doped germanate fiber and being in-band-pumped by a 1610 nm single-mode laser, a high-efficiency and high-power single-frequency distribute Bragg reflector (DBR) fiber laser emitting at 1950 nm is demonstrated. The DBR fiber laser has a maximum output power of ~617 mW and a slope efficiency for the absorbed pump power reaches to more than 42.2%. A stable single-longitudinal-mode laser output with a signal-to-noise ratio of greater than 63 dB is realized. The measured relative intensity-noise of the fiber laser reaches to around -150 dB/Hz at frequencies of over 8.4 MHz. It is beneficial to exploit the sub-watt and high-efficiency single-frequency laser from fiber oscillators directly, especially in the application of multiple paths coherent beam combination and optical medical technology.