Open AccessAll-fiber narrow-linewidth ring laser with continuous and large tuning range based on microsphere resonator and fiber Bragg grating
Author(s) -
Ligang Huang,
Pengfa Chang,
Xiaoting Li,
Wending Zhang,
Yujia Li,
Feng Gao,
Bo Fang,
Lei Gao,
Wenpeng Huang,
Min Liu,
Tao Zhu
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.032652
Subject(s) - materials science , laser linewidth , fiber bragg grating , optics , fiber laser , lasing threshold , laser , resonator , phosfos , optoelectronics , photonic crystal fiber , ring laser , fiber , wavelength , polarization maintaining optical fiber , fiber optic sensor , physics , composite material
We demonstrate an all-fiber single-longitudinal-mode (SLM) narrow-linewidth ring laser stabilized by a microsphere resonator and fiber Bragg gratings (FBGs) with a large continuous wavelength tuning range from 1540 nm to 1570 nm. In the experiment, stable lasing with a linewidth smaller than 5 kHz was obtained. The laser wavelength was linearly and continuously tuned in the range of 0.15 nm by increasing the pump power and discretely tuning with a step of 0.1 nm by stress-controlled FBGs. The tuning range of the proposed laser configuration was determined by the FBG, and the SLM state was ensured by the coupling between the few-mode tapered fiber and the microsphere, which was simpler in alignment than other ring lasers utilizing microresonators.