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Published March 23, 2000 | Published
Book Section - Chapter Open

Two-photon absorption inside β-BBO crystal during UV nonlinear optical conversion

Abstract

We measured the two-photon absorption (TPA) cross sections inside (beta) -BBO crystal during UV harmonic generation. We found that the 2-photon absorption is dominating the absorption effect inside the BBO crystal during UV harmonic generation. Both 2 UV photons and 1 UV photon + 1 fundamental photon absorption cross sections are significant. Possible explanations are presented, and compared with other nonlinear otpical crystals. Thermal profiles inside the crystal as a result of the strong absorption processes are discussed through a computer program that simulates the heat dissipation process. We conclude that TPA is the significant factor in high power scaling of UV harmonic generation inside nonlinear optical crystals.

Additional Information

© 2000 Society of Photo-Optical Instrumentation Engineers (SPIE). The funding from NSF MRI program (grant ATM-9724500, sponsored by the Atmospheric Chemistry program) is gratefully acknowledged.

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