Properties of transient and steady-state stimulated Raman scattering in KGd(WO4)2 and BaWO4 tungstate crystals

Pavel Cerny; Helena Jelinkova; Tasoltan T. Basiev; Peter G. Zverev

doi:10.1117/12.424630

1 May 2001 Properties of transient and steady-state stimulated Raman scattering in KGd(WO₄)₂ and BaWO₄ tungstate crystals

Pavel Cerny, Helena Jelinkova, Tasoltan T. Basiev, Peter G. Zverev

Author Affiliations +

Proceedings Volume 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials; (2001) https://doi.org/10.1117/12.424630
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

Abstract

BaWO₄ and KGd(WO₄)₂ (KGW) tungstate crystals (33 mm and 40 mm of length, respectively) were investigated as Raman frequency converters of picosecond and nanosecond second-harmonic Nd:YAG pulses. During the experiment the threshold energy of stimulated Raman (SR) process, generated wavelengths, and energy for nanosecond and picosecond pump pulses with both nonlinear crystals were measured. For BaWO₄ crystal, the threshold pumping intensity was measured to be 530 MW/cm² for psec pumping and 200 MW/cm² for nsec temporal region. The corresponding Raman gain values were 14.3 cm/GW (picosecond pump) and 38 cm/GW (nanosecond gain). For KGW crystal the threshold intensity values 530 MW/cm² for psec and 340 MW/cm² for nsec were measured with corresponding Raman gain values of 11.8 cm/GW (psec) and 18.6 cm/GW (nsec). The Stokes components up to the third order in both psec and nsec regions were detected. Temporal length measurements of pump and Stokes pulses in both crystals revealed pulse shortening by a factor of approximately 2 during the SR process. Due to a high value of Raman gain of a new BaWO₄ crystal under both nsec and psec pumping, this crystal can be considered as a unique candidate for utilization in solid-state Raman laser systems.

Citation Download Citation

Pavel Cerny, Helena Jelinkova, Tasoltan T. Basiev, and Peter G. Zverev "Properties of transient and steady-state stimulated Raman scattering in KGd(WO₄)₂ and BaWO₄ tungstate crystals", Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); https://doi.org/10.1117/12.424630

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