Open AccessMultiplexed multi-longitudinal mode fiber laser sensor
Author(s) -
Long Huang,
Peng Wang,
Liang Gao,
Tingting Zhang,
Xiangfei Chen
Publication year - 2014
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.22.025722
Subject(s) - optics , wavelength division multiplexing , longitudinal mode , multiplexing , optical amplifier , multiplexer , laser , demultiplexer , materials science , fiber bragg grating , fiber laser , fiber optic sensor , optical fiber , wavelength , optoelectronics , physics , telecommunications , computer science
A multiplexed multi-longitudinal mode fiber laser sensor system is proposed and demonstrated. By incorporating two matched wavelength division multiplexers (WDMs) and a semiconductor optical amplifier (SOA) into a fiber laser cavity, multiwavelength oscillation is established. Each wavelength corresponding to one channel of WDMs contains multi-longitudinal modes. The multiwavelength output of the laser is directed to another WDM which functions as a demultiplexer. By monitoring the longitudinal mode beat frequency generated at photodetectors following the WDM, the sensing information can be demodulated. Preliminary results for multiplexing two sensors measuring strain and temperature are presented to verify the principle of the system.