Abstract

A cw mode-locked Ti:sapphire laser was efficiently frequency doubled with a lithium triborate crystal in an external enhancement cavity. Second-harmonic output powers of 1.28 W and 860 mW have been generated at 399 nm with fundamental pulse widths of 1.5 and 320 ps, respectively. At the 1.5-ps pulse width the conversion efficiency was 75%. The spectral width of the 320-ps pulses, produced by modification of a laser cavity, is as narrow as the bandwidth of a normal cw, multimode, narrow-bandwidth Ti:sapphire laser. The frequency-doubled output can be thus used as a high-power, narrow-bandwidth light source in the UV region.

© 1994 Optical Society of America

Intracavity frequency doubling in a Ti:sapphire laser: generation of 14-fs pulses at 416 nm

S. Backus, M. T. Asaki, C. Shi, H. C. Kapteyn, and M. M. Murnane
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Nonlinear mirror mode locking of a cw Nd:YLF laser

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Single-mode 1.34-μm Nd:YVO₄ microchip laser with cw Ti:sapphire and diode-laser pumping

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Opt. Lett. 19(13) 957-959 (1994)