Singer L, Singer Z, Kimel S
Appl Opt. 1976 Nov 1;15(11):2678-83. doi: 10.1364/AO.15.002678.
It is shown that the output wavelength lambda(m) of a dye laser may be shifted with respect to lambda(0), the wavelength setting to which the dye laser is tuned by an intracavity wavelength-selective optical element such as a diffraction grating. The shift delta lambda = lambda(0) - lambda(m) is toward the wavelengths at which lasing would occur without the tuning element in the cavity. The magnitude of delta lambda is determined by the spectral width of the tuning element by the gain characteristics of the laser dye and by cavity design parameters. An analytic expression is presented for a dye laser oscillating at threshold gain and for a Gaussian wavelength distribution of the dispersive element. Some examples are discussed where wavelength shifts may be significant.
结果表明，染料激光器的输出波长λ(m)相对于λ(0)可能会发生偏移，λ(0)是通过腔内波长选择光学元件（如衍射光栅）将染料激光器调谐到的波长设置。偏移量Δλ = λ(0) - λ(m)朝着在腔内没有调谐元件时会发生激光振荡的波长方向。Δλ的大小由调谐元件的光谱宽度、激光染料的增益特性以及腔设计参数决定。给出了阈值增益下振荡的染料激光器以及色散元件的高斯波长分布的解析表达式。讨论了一些波长偏移可能很显著的例子。
