Mao Dong, Guan Chunying, Yuan Libo
Photonics Research Center, College of Science, Harbin Engineering University, Harbin 150001, China.
Appl Opt. 2010 Jul 1;49(19):3748-52. doi: 10.1364/AO.49.003748.
We propose a novel kind of polarization splitter in all-solid photonic crystal fibers based on the mode interference effects. Both the full-vector finite-element method and the semi-vector three-dimensional beam propagation method are employed to design and analyze the characteristics of the splitter. Numerical simulations show that x-polarized and y-polarized modes are split entirely along with 6.8 mm long propagation. An extinction ratio of more than 20 dB and a crosstalk of less than -20 dB are obtained within the wavelength range of 1.541-1.556 microm. The extinction ratio and the crosstalk at 1.55 microm are 28.9 and -29.0 dB for x polarization, while the extinction ratio and the crosstalk at 1.55 microm are 29.9 and -29.8 dB for y polarization, respectively.
我们基于模式干涉效应提出了一种全固态光子晶体光纤中的新型偏振分束器。采用全矢量有限元法和半矢量三维光束传播法来设计和分析该分束器的特性。数值模拟表明，x偏振模和y偏振模在6.8毫米长的传播过程中完全分离。在1.541 - 1.556微米的波长范围内，消光比超过20分贝，串扰小于 - 20分贝。对于x偏振，1.55微米处的消光比和串扰分别为28.9分贝和 - 29.0分贝；对于y偏振，1.55微米处的消光比和串扰分别为29.9分贝和 - 29.8分贝。
