Open AccessWavelength-tunable single longitudinal mode fiber optical parametric oscillator
Author(s) -
L. T. Lim,
M. H. Abu Bakar,
Mohd Adzir Mahdi
Publication year - 2017
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.25.005501
Subject(s) - optics , longitudinal mode , materials science , fiber laser , laser linewidth , single mode optical fiber , dispersion shifted fiber , polarization maintaining optical fiber , fiber bragg grating , graded index fiber , optical fiber , laser , optoelectronics , fiber optic sensor , physics
We demonstrate a ring cavity single longitudinal mode fiber optical parametric oscillator using a passive sub-ring cavity and an unpumped erbium doped fiber configured with an external fiber mirror for single mode selection. The unpumped erbium doped fiber uses its saturable absorption characteristic to generate a self-induced narrowband filter when two counter-propagating waves interfere inside the fiber. A single longitudinal mode laser is obtained with a linewidth of 17.35 kHz at a pump power of 31.2 dBm. A 3.8 nm tuning range from 1536.5 nm to 1540.3 nm is achieved with a signal-to-noise ratio of about 60 dB. The power stability of the single longitudinal mode laser is 2.07 dB over a period of 30 minutes.