Open AccessSide mode suppression using a doped fiber in a long external-cavity semiconductor laser operating at 1490 nm
Author(s) -
Runnan Liu,
Irina A. Kostko,
Ke Wu,
Raman Kashyap
Publication year - 2006
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.14.009042
Subject(s) - optics , materials science , fiber laser , laser , doping , optical fiber , optoelectronics , physics
We report on the spectral analysis of the first 1490 nm external cavity laser with an intra-cavity erbium-doped fiber. Self-mode beating and heterodyne beating methods are employed to measure the side mode suppression ratios and to study the effect of the rare-earth doped fiber on the spectrum of the external-cavity laser. Experimental and simulated results show a substantial decrease in the number of the external-cavity modes and a side-mode suppression ratio of >15 dB.