Open AccessUltra-short distributed Bragg reflector fiber laser for sensing applications
Author(s) -
Yang Zhang,
BaiOu Guan,
Hwa Yaw Tam
Publication year - 2009
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.17.010050
Subject(s) - optics , fiber bragg grating , laser linewidth , materials science , fiber laser , laser , lasing threshold , distributed bragg reflector , distributed feedback laser , relative intensity noise , optoelectronics , semiconductor laser theory , physics
We present an ultra-short distributed Bragg reflector fiber laser written in Er/Yb co-doped fiber. The entire laser is only 8.4 mm in length. The lasing threshold is less than 1 mW. The optical signal-to-noise ratio of the laser output is better than 70 dB. The laser emits two orthogonal polarization modes and generates a beat signal with signal-to-noise ratio of approximately 70 dB and 3-dB linewidth of approximately 3 kHz. The laser has longitude mode spacing comparable to the grating bandwidth. This obviates the possibility of mode hopping when the laser is subjected to any external perturbations.