LiB_3O_5: a highly efficient frequency converter for Ti:sapphire lasers

Abstract

Efficient second-harmonic generation in a LiB(3)O(5) crystal over the spectral range of a Ti:sapphire laser is demonstrated. The angular acceptance and damage threshold of the LiB(3)O(5) crystal are measured and calculated, and a 30% conversion efficiency is achieved (with a 5-mm-long crystal). The potential for increasing the conversion efficiency of second-harmonic generation at the edges of the spectral range of the Ti:sapphire laser is shown.

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“…The Ti:sapphire laser, which was pumped by a continuous wave (cw) argon ion laser, produced a 840 nm light pulsed of 1.5 ps duration and had a repetition rate of 82 MHz. The third harmonic radiation (THG) was generated by overlapping the fundamental and second harmonic radiation (SHG). , For the THG and SHG crystals, LiIO 3 and BBO were employed, respectively. The pulse repetition rate was decreased to 8.2 MHz by using an electrooptic light modulator (Con Optic, Model 1305).…”

“…The third harmonic radiation (THG) was generated by overlapping the fundamental and second harmonic radiation (SHG). 18,19 For the THG and SHG crystals, LiIO 3 and BBO were employed, respectively. The pulse repetition rate was decreased to 8.2 MHz by using an electrooptic light modulator (Con Optic, Model 1305 The overall instrument response function has a full width at half-maximum (fwhm) of approximately 30 ps at the excitation wavelength of 280 nm.…”