The influence of the core diameter and pump wavelength on the phase-matching conditions when different signal vector beams are injected is analyzed numerically in a suspended-core ${{\rm As}_2}{{\rm Se}_3}$ microstructured optical fiber (MOF). The idler wavelengths satisfying the phase-matching conditions with different signal vector beams can reach wavelengths of 4.8–5.9 µm in the ${{\rm As}_2}{{\rm Se}_3}$ MOFs with different core diameters. By changing the signal vector mode field and adjusting the corresponding signal wavelength, the idler wavelength can be tuned in 754.8 nm from 4.9182 to 5.6730 µm with the pump wavelength changing from 2.80 to 2.90 µm. The influence on signal gain and the idler conversion efficiency is calculated in the ${{\rm As}_2}{{\rm Se}_3}$ MOFs with different lengths when injecting different signal vector beams. The peak gain of signal and idler conversion efficiency can reach $\sim{28}\,\, {\rm dB}$ and $\sim{24}\% $, respectively, when the different signal vector beams are injected. The simulated results demonstrate that the optical parametric oscillation with wavelengths longer than 5 µm can be realized in chalcogenide fibers with signal vector beam injection.

中文翻译：

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在As ₂ Se ₃ MOF中注入信号矢量束对5μm左右中红外光学参量放大的数值研究

在悬浮芯$ {{\ rm As} _2} {{\ rm Se} _3} $微结构光学器件中数值分析了注入不同信号矢量束时，芯直径和泵浦波长对相位匹配条件的影响。光纤（MOF）。在具有不同纤芯直径的$ {{\ rm As} _2} {{\ rm Se} _3} $ MOF中，满足不同信号矢量光束相位匹配条件的惰轮波长可以达到4.8–5.9 µm的波长。通过更改信号矢量模式字段并调整相应的信号波长，可以将惰轮波长从4.9182调整为5.6730 µm的754.8 nm，泵浦波长从2.80更改为2.90 µm。对信号增益和惰轮转换效率的影响以$ {{\ rm As} _2} {{\ rm Se} _3} $计算注入不同的信号矢量束时，具有不同长度的MOF。当注入不同的信号矢量束时，信号的峰值增益和惰轮转换效率分别可以达到$ \ sim {28} \，\，{\ rm dB} $和$ \ sim {24} \％$。仿真结果表明，通过注入信号矢量束，可以在硫属化物光纤中实现波长大于5 µm的光学参量振荡。