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Optical Engineering

Wavelength selective switch with superflat passbands based on a microelectromechanical system micromirror array
Author(s): Guangming Cheng; Banghong Guo; Yunfei Zhou; Shi Chen; Zhenhua Li
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Paper Abstract

We propose and experimentally demonstrate an industrial wavelength selective switch (WSS) architecture based on a microelectromechanical system (MEMS) micromirror array. An anisotropic uniaxial crystal and a half-wave plate are employed as the polarization-diversity solution to reduce the polarization-dependent loss (PDL) of the WSS, and an achromatic lens composed of a positive lens and a negative lens is adopted to eliminate chromatic aberration. Experimental results show that it is possible to select and switch any wavelength channel from an input port to any output port through a two-stage beam steering process. The measured insertion loss and PDL are 4.78 and 0.5 dB, respectively. Benefiting from the customized MEMS micromirror array with a high fill factor of 96%, the 3 dB bandwidth is about 90 GHz. The results also show that the proposed WSS possesses uniform and superflat passbands for different wavelength channels.

Paper Details

Date Published: 9 December 2014
PDF: 6 pages
Opt. Eng. 53(12) 127102 doi: 10.1117/1.OE.53.12.127102
Published in: Optical Engineering Volume 53, Issue 12
Show Author Affiliations
Guangming Cheng, South China Normal Univ. (China)
Banghong Guo, South China Normal Univ. (China)
Yunfei Zhou, South China Normal Univ. (China)
Guangzhou Yongda Optical Communication Technology Development Co., Ltd. (China)
Shi Chen, Guangzhou Yongda Optical Communication Development Co., Ltd. (China)
Zhenhua Li, Huawei Technologies Co., Ltd. (China)

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