9 February 2009 Stable narrow linewidth ring fiber laser with a passive fiber Bragg grating Fabry-Perot etalon and a fiber saturable absorber
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Abstract
Narrow linewidth fiber lasers have become more and more necessary in field of coherent communication, fiber optic sensor, and high resolutions optical spectrum analysis, especially long-range distributed fiber sensing system. In this paper, a simple and stable narrow linewidth Er3+ -doped ring fiber laser is first proposed and experimentally demonstrated. In the cavity, a passive fiber Bragg grating Fabry-Perot (FBG F-P) etalon acts as mode-selecting device to greatly reduce the longitudinal-mode density, while a section un-pumped Er3+ -doped fiber serves as a saturable absorber to ensure the single longitudinal-mode (SLM) operation. Meanwhile the stability of lasing frequency is further improved by controlling the temperature of the FBG F-P, and then through varying the temperature the lasing wavelength tuning is achieved also. Finally stable SLM laser at 1550nm with linewidth about 7.5 kHz, maximum output power 39 mW and the corresponding slope efficiency 30% is acquired.
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Zhiyong Dai, Zhiyong Dai, Bo Wu, Bo Wu, Zengshou Peng, Zengshou Peng, Zhonghua Ou, Zhonghua Ou, Yongzhi Liu, Yongzhi Liu, } "Stable narrow linewidth ring fiber laser with a passive fiber Bragg grating Fabry-Perot etalon and a fiber saturable absorber", Proc. SPIE 7158, 2008 International Conference on Optical Instruments and Technology: Microelectronic and Optoelectronic Devices and Integration, 715817 (9 February 2009); doi: 10.1117/12.806925; https://doi.org/10.1117/12.806925
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