CsLiB6O10 crystal: forth and fifth-harmonic generation in Nd:YAP laser

Alexandr E. Kokh; Nadegda G. Kononova; Irina A. Lisova; Sergey V. Muraviov

doi:10.1117/12.424623

1 May 2001 CsLiB₆O₁₀ crystal: forth and fifth-harmonic generation in Nd:YAP laser

Alexandr E. Kokh, Nadegda G. Kononova, Irina A. Lisova, Sergey V. Muraviov

Proceedings Volume 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials; (2001) https://doi.org/10.1117/12.424623
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

Abstract

An area of CsLiB₆O₁₀ (CLBO) phase equilibrium in the (Cs₂O-Li₂O) -- B₂O₃ -- MoO₃ system was determined with spontaneous crystallization method. Crystals of 75 X 60 X 40 mm³ size have been growth in [100] direction with Kiropulos method. The forth-harmonic generation (270 nm) was achieved through the doubling of second-harmonic frequency in a multi-mode Nd:YAP laser in the type 1 collinear phase-matched geometry. The second-harmonic radiation in the technological laser of 3 mrad divergence was focused onto the input face of the crystal by a long-focus quartz lens. The input power density of the second harmonic was 300 MW/cm². Using a 11.5 mm crystal, we showed that the highest efficiency of the forth-harmonic generation is 30%. The fifth harmonic (216 nm) in CLBO crystal was generated by composing the main laser beam and the forth-harmonic beam under the type 1 collinear phase-matching. Both beams were converged with dichroic and turning mirrors and then focused by a long-focus quartz lens. Our experiments showed that the fifth-harmonic generation in a multi-mode technological laser of 3 mrad divergence is possible in a 10 mm CLBO crystal of 23% optical conversion efficiency. The input power density of the forth harmonic was 100 MW/cm². The use of longer CLBO crystal is less effective due to the nonlinear UV absorption and the walk off between the pump beam (1079 nm) and the harmonic beam.

Citation Download Citation

Alexandr E. Kokh, Nadegda G. Kononova, Irina A. Lisova, and Sergey V. Muraviov "CsLiB₆O₁₀ crystal: forth and fifth-harmonic generation in Nd:YAP laser", Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); https://doi.org/10.1117/12.424623

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