Opt Lett. 2018 Sep 1;43(17):4124-4127. doi: 10.1364/OL.43.004124.
In this Letter, a novel multiple self-mixing interferometer for a fiber ring laser (FRL) is designed by introducing a circular feedback cavity. A system model is established based on an injection-seeded erbium-doped FRL proposed by Dragic. Owing to the reflection of the collimating lens, the multiplied fringes have different depths, which shows two Doppler frequencies in the spectrum of the self-mixing signal. A double-peak frequency identification algorithm is proposed to extract the Doppler frequency from the unique signal. This technique has the potential to improve the accuracy of fiber self-mixing measurement systems, particularly in Doppler velocimeters.
在这封信件中，通过引入圆形反馈腔，设计了一种新颖的光纤环形激光器（FRL）多自混合干涉仪。基于 Dragic 提出的注入种子掺铒光纤激光器，建立了系统模型。由于准直透镜的反射，倍增条纹具有不同的深度，这在自混合信号的光谱中显示出两个多普勒频率。提出了一种双峰频率识别算法，从独特的信号中提取多普勒频率。这项技术有可能提高光纤自混合测量系统的精度，特别是在多普勒速度计中。
