Abstract
In this paper the single frequency, monolithic Nd:YVO4/YVO4/KTP green (532nm) laser is presented. The single mode operation was obtained using birefringent filter formed by a YVO4 beam displacer and a KTP crystal. The laser performances were improved by elimination of parasitic oscillations propagating along the beam displacer extraordinary ray. The single frequency operation temperature range was extended to 11.5°C and the output power increased to 160mW at 532nm compared to 85mW before optimization. The optical to optical efficiency (808–532nm) was 16.8%. The linewidth and the long term passive frequency stability under the free running conditions were Δν<100kHz and 1×10−8, respectively. The output power stability was at the level of ±0.75%. Presented monolithic, single frequency laser operating at 532nm may be used as an excellent source for measurement systems like laser vibrometry and interferometry.
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