Dual-wavelength CW diode-end-pumped a-cut Nd:YVO₄ laser at 1064.5 and 1085.5 nm

Shayeganrad, Gholamreza and Mashhadi, Leila (2013) Dual-wavelength CW diode-end-pumped a-cut Nd:YVO₄ laser at 1064.5 and 1085.5 nm. Applied Physics B: Lasers and Optics, 111 (2), 189-194. (doi:10.1007/s00340-012-5299-8).

Abstract

A simple and compact dual-wavelength continuous wave (CW) laser-diode end-pumped laser operating simultaneously at 1,064.5 and 1,085.5 nm in a single a-cut Nd:YVO₄ has been demonstrated. We have used two Nd:YVO₄ crystals with different Nd³⁺ concentrations and lengths; 0.1 %-14 mm and 0.25 %-12 mm. The maximum total output power of 5 and 6.18 W, including 1,064.5 and 1,085.5 nm, is achieved at the incident pump power of 22 and 18 W, with a slope efficiency 23.3 and 32.9 %, respectively, for the crystals of 0.1 %-14mm and 0.25 %-12 mm. The calculations show both wavelengths lasing at 1,064.5 and 1,085.5 nm can possess the same threshold when reflectivity of the output coupler at 1,064.5 nm is less than 87.5 % and, at this condition, the reflectivity of the output coupler at 1,085.5 nm increases nearly linearly with that of 1,064.5 nm.

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Contributors

Author: Gholamreza Shayeganrad

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