A low-threshold efficient KTA OPO by a fiber-coupled diode-end-pumped Nd:YVO<sub>4</sub> laser

Kai Zhong; Jian-quan Yao; De-gang Xu; Yu-ye Wang; Peng Wang

doi:10.1007/s11801-010-0078-4

Optoelectronics Letters ›› 2010, Vol. 6 ›› Issue (6) : 412-416. DOI: 10.1007/s11801-010-0078-4

Article

A low-threshold efficient KTA OPO by a fiber-coupled diode-end-pumped Nd:YVO₄ laser

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Abstract

A low-threshold efficient high-repetition-rate eye-safe optical parametric oscillator (OPO) is presented. The OPO is based on an x-cut non-critically phase-matched (NCPM) KTA intra-cavity pumped by an acousto-optically (A-O) Q-switched Nd:YVO₄ laser. At 10 kHz, the lowest threshold of 0.75 W and the signal power of 0.6 W are got, corresponding to the single pulse energy of 60 μJ and the peak power of 20 kW. Tuning the frequency, the maximum output power at 1536 nm is 1.03 W at 30 kHz with an optical-to-optical conversion efficiency of 12.26%. The fluctuation of the output power is 2.1% during 2 h operation.

Keywords

Pump Power / Maximum Output Power / Output Coupler / Optical Parametric Oscillator / Laser Crystal

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Kai Zhong, Jian-quan Yao, De-gang Xu, Yu-ye Wang, Peng Wang. A low-threshold efficient KTA OPO by a fiber-coupled diode-end-pumped Nd:YVO₄ laser. Optoelectronics Letters, 2010, 6(6): 412‒416 https://doi.org/10.1007/s11801-010-0078-4

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This work has been supported by the National Basic Research Development Program of China (No. 2007CB310403), and the National Natural Science Foundation of China (Nos. 60801017 and 10874128).