Simultaneous Dual-Wavelength Operation at 1.06 and 1.34 m
in Nd-Vanadate Laser Crystals¹

G. Salamu^a, E. Osiac^b, C. Dascalu^c, N. Pavel^a, *, and T. Dascalu^a

^a Laboratory of Solid-State Quantum Electronics, National Institute for Laser, Plasma and Radiation Physics,
Bucharest, R-077125 Romania

^b University of Medicine and Pharmacy, Petru Rares Street, Craiova, 200349 Romania

^c Politehnica University, Faculty of the Applied Sciences, Bucharest, R-060042 Romania

*e-mail: nicolaie.pavel@inflpr.ro

Received November 30, 2011; in final form, December 5, 2011; published online April 3, 2012

Abstract—Output performances of Nd-vanadate lasers with simultaneous dual-wavelength emission on the
1.06-m ⁴F_3/2 ⁴I_11/2 transition and the ⁴F_3/2 ⁴I_13/2 transition at 1.34 m are discussed. The design uses
a linear resonator for emission at 1.06 m and an L-type folded resonator for the 1.34-m wavelength, and the
ratio between the power of a single wavelength and the total power is adjusted by the choice of the output mirror
transmissions. A continuous-wave (CW) Nd:GdVO₄ laser with total output power in the range of 3.9 to 6.8 W
and the corresponding ratio of the output power at 1.06 m to the total output power between 0.26 and 0.97 is
realized. It is also shown that in comparison with the pump at 808 nm, the pump directly into the ⁴F_3/2 emitting
level at 879 nm improves the total output power. Furthermore, a Nd:GdVO₄ laser with simultaneous emission
at 1.06 and 1.34 m and that generates also green light at 0.53 m by intracavity frequency-doubling with
LiB₃O₅ (LBO) nonlinear crystal is demonstrated.

DOI: 10.1134/S1054660X12050222

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