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Proceedings Paper

Tunable high-power solid-state sources for the blue and ultraviolet
Author(s): G. K. Samanta; A. Esteban-Martín; M. Ghotbi; M. Ebrahim-Zadeh
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Paper 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.

Paper Details

Date Published: 12 February 2009
PDF: 14 pages
Proc. SPIE 7197, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII, 719702 (12 February 2009); doi: 10.1117/12.808939
Show Author Affiliations
G. K. Samanta, ICFO-Institut de Ciències Fotòniques (Spain)
A. Esteban-Martín, ICFO-Institut de Ciències Fotòniques (Spain)
M. Ghotbi, ICFO-Institut de Ciències Fotòniques (Spain)
M. Ebrahim-Zadeh, ICFO-Institut de Ciències Fotòniques (Spain)
Institucio Catalana de Recerca i Estudis Avancats (Spain)

Published in SPIE Proceedings Vol. 7197:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VIII
Peter E. Powers, Editor(s)

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