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Investigation and modelling of laser-damage properties of Fabry-Perot filters

The electric field distribution within a fabry-perot etalon is readily variable by changing the angle of incidence or the thickness of the etalon. The laser damage threshold (LDT) of Fabry-Perot etalons was measured as a function of electric field distribution, monitored through the transmittance. Two types of etalon were used - thin film Fabry-Perot devices with high finesse were investigated at 1.064Ã‚Âµm, and a simple dielectric slab etalon (Germanium) was investigated at 10.6Ã‚Âµm.