Dual-wavelength eye-safe optical parametric oscillator intracavity driven by a coaxially end pumped laser

Yang Liu; Kai Zhong; Jie Shi; Hongzhan Qiao; Xin Ding; Degang Xu; Jianquan Yao

doi:10.1117/12.2500317

9 November 2018 Dual-wavelength eye-safe optical parametric oscillator intracavity driven by a coaxially end pumped laser

Yang Liu, Kai Zhong, Jie Shi, Hongzhan Qiao, Xin Ding, Degang Xu, Jianquan Yao

Author Affiliations +

Proceedings Volume 10825, Quantum and Nonlinear Optics V; 1082516 (2018) https://doi.org/10.1117/12.2500317
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

A compact and flexible dual-wavelength eye-safe intracavity optical parametric oscillator (IOPO) configuration driven by a coaxially end pumped laser was proposed. Two fundamental waves were provided by a coaxially end pumped Qswitched dual-wavelength laser with combined two laser crystals, and the OPO cavity was placed inside the laser cavity for efficient conversion. Theoretical simulations showed that the power ratio for each signal wave, as well as the time interval between two pulses at different wavelengths, were both tunable by tuning the pump focusing depth or pump wavelength. Experimental results were performed with combined laser crystals (Nd:YAG and a-cut Nd:YLF) and a nonlinear crystal (KTA), demonstrating coincident conclusions. The maximum OPO output power was 724 mW (388 mW at 1506 nm and 336 mW at 1535 nm) with the LD pump power of 10 W at 6 kHz, corresponding to the opticaloptical conversion efficiency of 7.24%. As there was no gain competition between two fundamental waves, stable signal output could be obtained. Moreover, various wavelength pairs can be generated by using different laser crystal combinations. It is believed that this is a promising method for simultaneously generating dual-wavelength eye-safe lasers pulses.

Citation Download Citation

Yang Liu, Kai Zhong, Jie Shi, Hongzhan Qiao, Xin Ding, Degang Xu, and Jianquan Yao "Dual-wavelength eye-safe optical parametric oscillator intracavity driven by a coaxially end pumped laser", Proc. SPIE 10825, Quantum and Nonlinear Optics V, 1082516 (9 November 2018); https://doi.org/10.1117/12.2500317

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KEYWORDS

Optical parametric oscillators

Laser crystals

Q switching

Crystals

Signal processing

Laser resonators

Composites

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