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

Sheng Wu; Geoffrey A. Blake; Sunny Sun; Henry Yu

doi:10.1117/12.379921

23 March 2000 Two-photon absorption inside β-BBO crystal during UV nonlinear optical conversion

Sheng Wu, Geoffrey A. Blake, Sunny Sun, Henry Yu

Proceedings Volume 3928, Nonlinear Materials, Devices, and Applications; (2000) https://doi.org/10.1117/12.379921
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States

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.

Citation Download Citation

Sheng Wu, Geoffrey A. Blake, Sunny Sun, and Henry Yu "Two-photon absorption inside β-BBO crystal during UV nonlinear optical conversion", Proc. SPIE 3928, Nonlinear Materials, Devices, and Applications, (23 March 2000); https://doi.org/10.1117/12.379921

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