Title :
Characteristics of regenerative erbium-doped fibre ring amplifier
Author_Institution :
Advantest Labs. Ltd., Miyagi, Japan
fDate :
6/8/2000 12:00:00 AM
Abstract :
A study is presented into the dynamic characteristics of a unidirectional regenerative erbium-doped fibre ring amplifier at below laser threshold. A considerable improvement in gain and noise figure performance was observed due to the suppression of amplified spontaneous emission in the regenerative amplification process. It was found that lower feedback power provides higher optical gain. An optical signal of -33.5 dB was found to experience a gain of ⩾35 dB at and near the resonance wavelength using 1% feedback by an optical fibre coupler for an optical pump (1480 nm) power as low as 10 mW
Keywords :
erbium; laser beams; laser feedback; laser noise; optical fibre amplifiers; optical fibre couplers; optical pumping; ring lasers; superradiance; 10 mW; 1480 nm; 35 dB; Er-doped fibre ring amplifier; amplified spontaneous emission; dynamic characteristics; feedback; feedback power; gain; gain performance; laser threshold; noise figure performance; optical fibre coupler; optical gain; optical pump power; optical signal; regenerative amplification process; regenerative fibre ring amplifier; resonance wavelength; suppression; unidirectional regenerative fibre ring amplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000736
