Fabry-Perot with short pulse lasers: spectral selection and spectral analysis in dye lasers.

When a Fabry-Perot is used for spectral narrowing in nitrogen laser pumped dye lasers their energy may be divided by ten. This is due to the nonstationary regime of the Fabry-Perot, which is analyzed in this paper by calculating the phase transmission vs time. Optimization of the spectral brightness through the choice of the reflectivity of the mirrors is calculated and compared to the experimental results in the uv range. The effect of the spacings of the mirrors on the integrated spectral resolution of the Fabry-Perot used as a spectrum analyzer is also looked at theoretically and experimentally.