In this paper, a 1 × 2 optical switch based on two TE/TM polarization converters, one 1 × 2-polarization beam splitter and a hybrid 2 × 2-polarization beam splitter/combiner is designed and discussed. The novelty of this work resides in the design of a 2 × 2-hybrid polarization beam combiner/splitter, operating as a 2 × 2 polarization optical switch through the combining and the splitting of polarized signals issued from two TE/TM polarization controllers. The novel hybrid splitter/combiner can route an optical signal either to a bar or a cross port with an extinction ratio higher than 90 dB, thanks to the feature of polarization splitting used in this device to suppress undesired polarization states and minimize the polarization-dependent loss. We have used polarization beam converters to switch between two orthogonal modes in order to facilitate the routing of these signals through the 2 × 2-hybrid polarization splitter/combiner. We changed the polarization states of signals, in our simulation via OptiSystem, through polarization controllers, by modifying only their phase shifts between 0 rad and π rad. The proposed 1 × 2 optical switch presents an average insertion loss of 3.5 dB.

中文翻译：

---

基于偏振转换器和分光器的1×2新型光开关的设计

本文设计并讨论了一个基于两个TE / TM偏振转换器，一个1×2偏振分束器和一个混合2×2偏振分束器/组合器的1×2光开关。这项工作的新颖性在于2×2混合偏振光束合成器/分离器的设计，通过合并和分离由两个TE / TM偏振控制器发出的偏振信号，可以作为2×2偏振光开关使用。新型混合分路器/合路器可以将光信号传送到消光比高于90 dB的条形或交叉端口，这要归功于该设备中使用的偏振分光功能可以抑制不希望的偏振态并使偏振相关性最小化失利。我们已经使用偏振光束转换器在两个正交模式之间切换，以便于通过2×2混合偏振分束器/组合器路由这些信号。在仿真中，我们通过OptiSystem，通过偏振控制器更改了信号的偏振态，方法是仅修改信号在0 rad和πrad之间的相移。建议的1×2光开关的平均插入损耗为3.5 dB。