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1 × 25 LCOS-based wavelength selective switch with flexible passbands and channel selection

机译：1×25基于LCOS的波长选择开关，具有灵活的通带和通道选择

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摘要

Wavelength-selective-switching based reconfigurable optical add-drop multiplexers are the essential components of current and next generation dynamic optical networks. A proof-of-concept 1 x 25 wavelength selective switch is demonstrated experimentally based on liquid crystal on silicon (LCOS) technology and 2-foptical system. Each of the input C-band wavelength channel can be independently selected and switched into arbitrary output ports. The channel passband and channel spacing can be adjusted flexibly by applying holograms onto an LCOS chip. The insertion loss for polarized beam ranges from 5.4 to 7.5 dB for 1-20 output ports and increases up to 9.6 dB at side ports for 100 GHz spaced ITU-T channels over the C-band. The general channel crosstalk is below - 20 dB. The minimum resolution of center frequency for each channel is 5 GHz (0.04 nm). The performance can be further improved by using an LCOS chip with smaller pixel pitch, higher-quality optical components and accurate alignment of the fiber-lenslet array.
机译：基于波长选择开关的可重构光分插复用器是当前和下一代动态光网络的基本组成部分。基于硅基液晶（LCOS）技术和2光学系统，实验证明了概念验证的1 x 25波长选择开关。每个输入C波段波长通道均可独立选择并切换到任意输出端口。通过将全息图应用于LCOS芯片，可以灵活地调整通道通带和通道间隔。对于1-20个输出端口，偏振光束的插入损耗在5.4至7.5 dB的范围内，对于在C波段上间隔100 GHz的ITU-T信道，在侧面端口上的插入损耗最高可达9.6 dB。一般通道串扰低于-20 dB。每个通道的中心频率的最小分辨率为5 GHz（0.04 nm）。通过使用具有较小像素间距，更高质量的光学组件以及光纤-小透镜阵列精确对准的LCOS芯片，可以进一步提高性能。

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