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5 September 2000 Laser oscillation of Nd:KGd(WO4)2 in the 1.538-μm eye-safe range
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The radiation at around 1.5 micrometer has been extensively investigated over the last few years for eye-safe applications. This paper describes the development and performance of a pulsed solid-state laser based on nonlinear frequency conversion of the Nd:KGd(WO4)2 fundamental radiation into the near-infrared region of the spectrum. Neodymium-doped potassium gadolinium tungstate Nd:KGd(WO4)2 (Nd:KGW) possesses a combination of spectral and lasing characteristics uniquely favorable for laser operation. The explanation for the high efficiency which can be achieved with this material follows from high effective stimulated- emission cross section of laser transition. Also, in contrast to Nd:YAG, Nd:KGW is an efficient Raman medium. In the present paper most attention has been concentrated on the self- conversion of the laser wavelength at 1.351 micrometer to the first Stokes line at 1.538 micrometer. In conclusion, we have demonstrated a compact low-threshold source for the near-IR in configuration of an intra-cavity solid-state Raman laser based on a flashlamp-pumped Nd:KGW laser crystal. The small size and high efficiency of this laser makes it an attractive source for a large number of applications such as communications and optical atmospheric studies.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eugene V. Raevsky, Alexander V. Gulin, Nikolai S. Ustimenko, and Vladimir L. Pavlovitch "Laser oscillation of Nd:KGd(WO4)2 in the 1.538-μm eye-safe range", Proc. SPIE 4035, Laser Radar Technology and Applications V, (5 September 2000);


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