首页|Design of LCoS-Based Twin 1×40 Wavelength Selective Switch
Design of LCoS-Based Twin 1×40 Wavelength Selective Switch
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Wavelength selective switch (WSS) is the crucial component in the reconfigurable optical add/drop multiplexer (ROADM),which plays a pivotal role in the next-generation all-optical networks. We present a compact architecture of twin 1×40 liquid crystal on silicon (LCoS)-based WSS,which can be regarded as a 4f system in the wavelength direction and a 2f system in the switching direction. It is designed with theoretical analysis and simulation investigation. Polarization multiplexing is employed for two sources of twin WSS by polarization con-version before the common optical path. The WSS system attains a coupling efficacy exceeding 96％ for 90％ of the ports through simulation optimization. The 3 dB bandwidth can be achieved by more than 44 GHz at a 50 GHz grid for all 120 channels at all deflection ports. This work establishes a solid foundation for developing high-performance WSS with larger port counts.
wavelength selective switch (WSS)liquid crystal on silicon (LCoS)optical structure designinsertion loss
WANG Han、LIU Maoqi、FENG Zhenhua、LIU Minghuan、MAO Baiwei
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School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China
Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China
WDM System Department of Wireline Product R&D Institute,ZTE Corporation,Wuhan 430223,China
State Key Laboratory of Mobile Network and Mobile Multimedia Technology,Shenzhen 518055,China
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