A novel design of optical wavelength switch, based on an asymmetric switching architecture for edge node implementation, is presented in this paper. Compared to previous research for optical core transport network applications, the proposed work has a unique aspect to build dynamic multicasting and spectral equalization, vital functionalities for optical wavelength switch in the edge of optical access networks. An optical wavelength switch was experimentally implemented and evaluated in a 4 × 16 switching architecture to demonstrate the concept. This dynamic multicasting and spectral equalization were achieved by utilizing liquid crystal on a silicon spatial light modulator (LCoS-SLM) device. An optimal design of computer-generated holograms (CGHs) through an improved GS algorithm was used to perform the beam steering and wavelength switching. A variety of wavelength switching scenarios has been experimentally evaluated. The measurement results showed an average insertion loss of around -12.5 dB, and the calculated crosstalks were all less than -28 dB. Its applications in digital data transmissions were evaluated to achieve a transmission speed larger than 2.5 Gbps. The eye diagram measurement results showed that most wavelength switching scenarios have nearly bit-error-free transmission. The scenario includes the multicasting with spectral equalization within the proposed asymmetrical switching architecture.

中文翻译：

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光接入网边缘节点基于LCoS-SLM的非对称光波长开关


本文提出了一种基于边缘节点实现的非对称交换架构的光波长开关的新颖设计。与之前的光核心传输网络应用研究相比，本文提出的工作具有独特的方面，即构建动态组播和频谱均衡，这是光接入网络边缘光波长开关的重要功能。在 4 × 16 交换架构中对光波长开关进行了实验实施和评估，以演示这一概念。这种动态多播和光谱均衡是通过利用硅空间光调制器（LCoS-SLM）设备上的液晶来实现的。通过改进的 GS 算法对计算机生成全息图 (CGH) 进行优化设计，用于执行光束控制和波长切换。已经对各种波长切换场景进行了实验评估。测量结果显示平均插入损耗约为-12.5 dB，计算出的串扰均小于-28 dB。其在数字数据传输中的应用经评估可实现大于2.5 Gbps的传输速度。眼图测量结果表明，大多数波长切换场景都具有几乎无误码的传输。该场景包括在所提出的非对称交换架构内具有频谱均衡的多播。