Fang X, Claus R O
Opt Lett. 1995 Oct 15;20(20):2146-8. doi: 10.1364/ol.20.002146.
An all-fiber wavelength-division multiplexer (WDM) based on the nonreciprocity of the birefringence to the polarization states is proposed. The transfer function of a Sagnac interferometer is wavelength dependent if the loop birefringence of the interferometer consists of both circular and linear parts. Theoretical analysis shows that the output characteristics of this WDM are similar to those of a fiber taper-based device. Both the bandwidth and the peak wavelength of the new WDM can be tuned by changing the loop birefringence. Experimental prototypes exhibit a channel isolation greater than 25 dB with peak passband insertion loss of less than 1 dB.
提出了一种基于双折射对偏振态的非互易性的全光纤波分复用器（WDM）。如果萨格纳克干涉仪的环向双折射由圆偏振和线偏振两部分组成，则该干涉仪的传递函数与波长有关。理论分析表明，这种波分复用器的输出特性与基于光纤锥的器件相似。通过改变环向双折射，可以调节新型波分复用器的带宽和峰值波长。实验样机的通道隔离度大于25dB，峰值通带插入损耗小于1dB。
