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-μm regime and pumped by 1.48-μm InGaAsP laser diodes. Mode-hoping 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.
|ジャーナル||Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)|
|出版ステータス||Published - 1999 5月|
ASJC Scopus subject areas
- コンピュータ ネットワークおよび通信