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A single-frequency and single-polarization fiber ring laser using a 5-Ghz fiber Bragg grating

✍ Scribed by Hajime Inaba; Yoshiaki Akimoto; Koichi Tamura; Eiji Yoshida; Tetsuro Komukai; Masataka Nakazawa

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
200 KB
Volume
82
Category
Article
ISSN
8756-663X

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✦ Synopsis

A low-threshold, single-frequency fiber laser was achieved without feedback control. This laser was a narrow linewidth fiber ring laser operating in the 1.55-Pm regime and pumped by 1.48-Pm InGaAsP laser diodes. Mode-hopping instabilities and multiwavelength oscillation due to spatial and polarization hole burning were eliminated by the use of an ultra-narrowband fiber Bragg grating and a polarization-dependent isolator. The laser exhibited stable single-frequency operation at all pump powers. The maximum output power was 1 mW, and the linewidth was less than 20 kHz.

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