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Abstract

In a multi-optical parametric oscillator by pulse pumping, energy conversion process for 1.57 μm and 3.84 μm parametric light can be expressed by time-dependent wave equations. The split-step integration method is used to solve the equations. By analyzing the simulation results of the output waveform for the multi-optical parametric amplifier, it is confirmed that back conversion and mode competition are the important factors affecting the multi-optical parametric oscillation. The 1.57 μm and 3.84 μm parametric light in an external cavity multi-optical parametric oscillator are simulated under different output mirror transmittances, crystal working lengths and cavity lengths. The conversion efficiency of 1.57 μm and 3.84 μm increase with the output mirror transmittance increasing, which means that the conversion efficiency can be adjusted by changing the parametric light transmittance of the output mirror. There exist an optimal crystal working length and a cavity length in the external cavity multi-optical parametric oscillator. The experiment on external cavity multi-optical parametric oscillator is carried out. The conversion efficiency of 1.57 μm and 3.84 μm parametric light are consistent with the theoretical values. The energy conversion process in the multi-optical parametric oscillator can be simulated by this method, which could be used for optimizing the multi-optical parametric oscillator and increasing the parametric conversion efficiency.

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Authors and contacts

Corresponding author:Yu Yong-Ji,yyjcust@163.com; Jin Guang-Yong,jgyciom@163.com

Funds:Project supported by the National Natural Science Foundation of China (Grant No. 61505013), the Postdoctoral Science Foundation of China (Grant No. 2016 M591466), the Key Science and Technology Program of Jilin Science and Technology Department, China (Grant No. 20170204046GX), and the Young and Middle-aged Science and Technology Innovation Leader and Team of Jilin Science and Technology Department , China (Grant No. 20190101004JH)

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腔镜	膜系
腔镜M3	1064 nm@HT, 1.47 μm/ 1.57 μm/3.3 μm/ 3.84 μm@HR
腔镜M4 (1064 nm/3.3 μm @HR, 1.57 μm@T=40%, 3.84 μm@HT)	1) 1.47 μm@T= 80%;
	2) 1.47 μm@T= 60%;
	3) 1.47 μm@T= 40%;
	4) 1.47 μm@T= 20%

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Vol. 68, Issue 24 - 2019-12-20

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