Open Access1120 nm kHz-linewidth single-polarization single-frequency Yb-doped phosphate fiber laser
Author(s) -
Changsheng Yang,
Qilai Zhao,
Zhouming Feng,
Mingying Peng,
Zhongmin Yang
Publication year - 2016
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.24.029794
Subject(s) - laser linewidth , materials science , optics , fiber bragg grating , fiber laser , relative intensity noise , lasing threshold , extinction ratio , laser , optoelectronics , wavelength , semiconductor laser theory , physics
A spectrally clean kHz-linewidth single-polarization single-frequency distributed Bragg reflector Yb-doped phosphate fiber (YPF) laser at 1120 nm (> 1100 nm) for the first time is demonstrated. By enhancing the reflectivity of output fiber Bragg grating and optimizing the length of YPF to implement the effective ASE suppression and single-longitudinal-mode long-wavelength lasing, a stable output power of over 62 mW is achieved from a 31-mm-long highly YPF with a linewidth of 5.7 kHz. The signal to noise ratio of > 67 dB, the polarization extinction ratio of > 25 dB, and the relative intensity noise of < -150 dB/Hz for the frequencies above 10.0 MHz are obtained in such single-frequency fiber laser. This narrow linewidth fiber laser is an ideal laser source to generate the coherent single-frequency 560 nm light via frequency doubling for biochemical analysis application.