Journal
OPTICAL ENGINEERING
Volume 57, Issue 12, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.57.12.121907
Keywords
absorption; nonlinear optical materials; instrumentation; measurements; metrology; photothermal effects
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Funding
- Federal Ministry of Economics and Technology
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A simplified absolute calibration for the photothermal laser-induced deflection technique is introduced and applied to characterize different nonlinear optical crystals at common diode pumped solid state laser wavelengths. In particular, intensity-dependent absorption measurements at 355 nm are performed to investigate the nonlinear absorption in lithium triborate crystals. From the results, it is verified that at least to a certain extent the nonlinear absorption is related to impurities or defects, i.e., to sequential three-photon absorption in addition to a potential intrinsic three-photon absorption process. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
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