High-power dual pump cw Ti:sapphire laser: setting new records

Scott C. Shukes; Robert Splinter; M. Yasin Akhtar Raja; Jenn-Ying Liu; George P. Tatsis

doi:10.1117/12.206504

10 April 1995 High-power dual pump cw Ti:sapphire laser: setting new records

Scott C. Shukes, Robert Splinter, M. Yasin Akhtar Raja, Jenn-Ying Liu, George P. Tatsis

Proceedings Volume 2379, Solid State Lasers and Nonlinear Crystals; (1995) https://doi.org/10.1117/12.206504
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

A Ti:Sapphire CW laser operating at room temperature provides an output power of 6.7 W, limited by available pump power. A Z-configuration oscillator (LEXEL laser) was modified to operate in dual pump mode. The Ti:Sapphire laser was pumped by two independent 13 watt CW Ar-ion lasers. The two Ar-ion lasers were focussed on each end of the Ti:Sapphire crystal. The Ti:Sapphire laser covers the visible red to the near infrared regime (690-1100 nm) with four sets of mirrors. A three plate birefringent filter was used for wavelength tuning, with a 0.5 nm bandwidth. The spectral analysis was performed with a monochromator with a resolution of 0.2 nm. A maximum output of 6.7 Watt was achieved at 790 nm, in TEM₀₀ mode, corresponding to a conversion efficiency of 26%. The Ti:Sapphire was operating below saturation levels at 26 W total pump. Laser output without the birefringent filter resulted in spontaneous mode hopping leading to output wavelength fluctuations between several resonant wavelengths. Double pumping resulted in higher output powers than single pumping with corresponding total input power. The flat tuning curve in combination with the high output powers makes this laser an ideal source for spectral investigations of laser tissue interaction.

Citation Download Citation

Scott C. Shukes, Robert Splinter, M. Yasin Akhtar Raja, Jenn-Ying Liu, and George P. Tatsis "High-power dual pump cw Ti:sapphire laser: setting new records", Proc. SPIE 2379, Solid State Lasers and Nonlinear Crystals, (10 April 1995); https://doi.org/10.1117/12.206504

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KEYWORDS

Sapphire lasers

Mirrors

Continuous wave operation

Optical filters

Laser tissue interaction

Crystals

High power lasers

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