Wavelength Tunable Fiber Optical Parametric Oscillator via Cavity Length Tuning of Pump Oscillator

介绍了一种泵浦振荡器腔长调谐的光纤参量振荡器，研究了改变泵浦振荡器的腔长时，光纤参量振荡器输出的波长调谐特性。泵浦振荡器经放大和选频后，为光纤参量振荡器提供泵浦光。当选频比为10、泵浦振荡器的中心波长为1030 nm时，泵浦振荡器的腔长改变0.8 mm，等效于光纤参量振荡器的腔长改变8 mm，在色散滤波的作用下，光纤参量振荡器的波长在748.3~754.9 mm范围内可调谐。当在1030~1040 nm范围内改变泵浦振荡器的中心波长时，采用上述方式，光纤参量振荡器的输出波长在748.3~789.2 nm内可调谐。该方法仅通过改变泵浦振荡器的腔长，就能实现光纤参量振荡器的波长调谐。相比传统改变光纤参量振荡器腔长的方案，泵浦振荡器的腔长改变量仅为原来的选频比分之一，有望用于快速调谐的光纤参量振荡器上。We introduce a fiber optical parametric oscillator with pump oscillator cavity length tuning and study the wavelength tuning characteristics of the output of the fiber optical parametric oscillator when the cavity length of the pump oscillator is changed. After amplification and frequency selection, the pump oscillator provides pump beam for the fiber optical parametric oscillator. When the frequency ratio is 10 and the center wavelength of the pump oscillator is 1030 nm, the cavity length of the pump oscillator changes by 0.8 mm, which is equivalent to a change of 8 mm in the cavity length of the fiber optical parametric oscillator. Under the effect of dispersion filtering, the wavelength of the fiber optical parametric oscillator can be tuned in the range of 748.3~754.9 mm. When changing the center wavelength of the pump oscillator within the range of 1030~1040 nm, using the above method, the output wavelength of the fiber optical parametric oscillator can be tuned within the range of 748.3~789.2 nm. This method can achieve wavelength tuning of fiber optical parametric oscillators by simply changing the cavity length of the pump oscillator. Compared with the traditional scheme of changing the cavity length of fiber optical parametric oscillators, the cavity length change of pump oscillators is only one of the original frequency selection ratios, which is expected to be used in fast tuning fiber optical parametric oscillators.