Tunable high-power solid-state sources for the blue and ultraviolet

G. K. Samanta; A. Esteban-Martín; M. Ghotbi; M. Ebrahim-Zadeh

doi:10.1117/12.808939

12 February 2009 Tunable high-power solid-state sources for the blue and ultraviolet

G. K. Samanta, A. Esteban-Martín, M. Ghotbi, M. Ebrahim-Zadeh

Proceedings Volume 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII; 719702 (2009) https://doi.org/10.1117/12.808939
Event: SPIE LASE: Lasers and Applications in Science and Engineering, 2009, San Jose, California, United States

Abstract

We describe new sources of tunable, high-power radiation in the blue and ultraviolet. Continuous-wave (cw), singlefrequency blue radiation tunable across 425-489 nm and femtosecond ultraviolet (UV) radiation tunable across 250-355 nm is generated by intracavity frequency-doubling of resonant signal radiation in cw and ultrafast optical parametric oscillators (OPOs) in singly-resonant oscillator (SRO) configuration. The cw SRO, pumped in the green, uses a 30-mm MgO:sPPLT as the nonlinear material and a 5-mm BiB₃O₆ (BIBO) crystal for internal doubling. Using this approach, we generate 1.27 W of cw blue power with a linewidth of 8.5 MHz and a TEM₀₀ profile. The device also generate a singlefrequency signal output of ~100 mW across 850-978 nm and up to 2.6 W of idler power in the 1167-1422 nm spectral range. The femtosecond SRO, based on a 400-μm BIBO crystal and pumped at 415 nm in the blue, can provide visible femtosecond signal pulses across 500-710 nm. Using a 500-μm crystal of β-BaB₂O₄ internal to the SRO cavity, efficient frequency doubling of the signal pulses into the UV is achieved, providing tunable femtosecond pulses across 250-355 nm with up to 225 mW of average power at 76 MHz. Cross-correlation measurements result in UV pulses with durations down to 132 fs for 180 fs blue pump pulses.

Citation Download Citation

G. K. Samanta, A. Esteban-Martín, M. Ghotbi, and M. Ebrahim-Zadeh "Tunable high-power solid-state sources for the blue and ultraviolet", Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 719702 (12 February 2009); https://doi.org/10.1117/12.808939

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