摘要
本文提出并论证外腔模式自发发射因子急剧减小使模式选择所需的增益差和光场相位噪声皆急剧减小是外腔半导体激光器具有优异的纵模选择和线宽压缩性能同时又具有严重不稳定性的统一的关键性物理根源。
It is proposed and shown theoretically that the physical origin of the excellent mode selectivity
and linewidth compressibility but with serious mode instability in the external cavity semiconductor
lasers is commonly the drastical decrease of spontaneous emission factor of the external
cavity mode relative to that of single F-P cavity mode, which results in decreasing drastically
both the gain difference needed for mode selection and the laser phase noise by spontaneous emission
determining the spectral linewidth. This may clear up more satisfactorily such a puzzling
problem.
关键词
半导体激光器
自发射因子
模式
External cavity
Semiconductor laser
Spontaneous emission factor
Mode selection, Spectral linewidth compression
