30 May 2003 A coherent spectrophotometer for optical coating chacterization
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Abstract
A laser spectrophotometer based on optical parametric oscillators for characterization of optical coatings in the spectral range 420 - 4500 nm is described. The characterization includes measurements of reflectance and transmittance, absorption losses, and laser-induced damage thresholds. The master oscillator of the pump-laser system is a diode-pumped, Q-switched Nd:YAG laser. Additional power, when needed for laser-induced damage threshold measurements, is obtained from flashlamp-pumped Nd:YAG amplifiers. Operation of the laser spectrometer is demonstrated by absorptance measurements and reflectance and transmission measurements of optical coatings over a wide range of angle of incidence. Damage thresholds are measured both with the OPO output and with the direct output and harmonics of the output of the amplified laser system.
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Ona Balachninaite, Ona Balachninaite, Robert C. Eckardt, Robert C. Eckardt, Rimantas Grigonis, Rimantas Grigonis, M. Peckus, M. Peckus, Valdas Sirutkaitis, Valdas Sirutkaitis, "A coherent spectrophotometer for optical coating chacterization", Proc. SPIE 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization, (30 May 2003); doi: 10.1117/12.472378; https://doi.org/10.1117/12.472378
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