Flamant P
Appl Opt. 1978 Mar 15;17(6):955-9. doi: 10.1364/AO.17.000955.
Spectral narrowing in pulsed dye lasers is studied theoretically. Fabry-Perot etalons, gratings, and prisms are considered as tuning elements. Each one is characterized by a new parameter: the spectral width associated with a round trip in the laser cavity. Numerical examples show that depending on cavity parameters it is either the round-trip spectral width or the width due to beam divergence which limits the bandwidth of the laser emission. Instantaneous spectral narrowing is found to be proportional to the square root of the time elapsed after the laser onset when a Fabry-Perot etalon or grating is used. When a prism is set in the laser cavity the instantaneous narrowing is proportional to time.
对脉冲染料激光器中的光谱窄化进行了理论研究。法布里-珀罗标准具、光栅和棱镜被视为调谐元件。每一种都由一个新参数表征：与激光腔内往返一次相关的光谱宽度。数值示例表明，根据腔参数，限制激光发射带宽的要么是往返光谱宽度，要么是由于光束发散导致的宽度。当使用法布里-珀罗标准具或光栅时，发现瞬时光谱窄化与激光启动后经过的时间的平方根成正比。当在激光腔中设置一个棱镜时，瞬时窄化与时间成正比。
