Highly efficient intracavity frequency-doubled Nd:GdVO4-LBO red laser at 670 nm under direct 880 nm pumping |
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Authors: | Y. F. Lü X. H. Zhang J. Xia X. D. Yin A. F. Zhang L. Bao D. Wang H. Quan |
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Affiliation: | 1. School of Sciences, Changchun University of Sciences and Technology, Changchun, 130022, China 2. Jilin Junkun Optoelectronics Company Limited, Changchun, 130012, China 3. Laboratory of Info-integration Technology, Xi’an Institute of Applied Optics, Xi’an, 710065, China
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Abstract: | We report the efficient compact red laser at 670 nm generation by intracavity frequency doubling of a continuous wave laser operation of a diode direct pumped Nd:GdVO4 laser on the 4 F 3/2 → 4 I 13/2 transition at 1340 nm. An LBO crystal, cut for critical type I phase matching at room temperature is used for second harmonic generation of the laser. At an absorbed pump power of 16.2 W, as high as 5.1 W of continuous wave output power at 670 nm is achieved with 15-mm-long LBO. The optical-to-optical conversion efficiency is up to 0.31, and the fluctuation of the red output power was better than 3.0% in the given 30 min. Comparative results obtained for the pump with diode laser at 808 nm, into the highly-absorbing 4 F 5/2 level, are given in order to prove the advantages of the 880 nm wavelength pumping. |
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