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Parallel-stage-based reconfigurable optical add-drop multiplexer for WDM optical transport networks

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7 Author(s)
Qirui Huang ; Sch. of Optoelectron. Sci. & Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China ; Fengguang Luo ; Zhuo Wang ; Ming Xia
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This letter proposes a simple and flexible reconfigurable optical add-drop multiplexer (ROADM) based on parallel-stage configuration using Mach-Zehnder-based fiber gratings, 1times2 optical switches, and Y-model combiners. The proposed ROADM with four-stage parallel configuration is designed and experimentally investigated to show its performance in full wavelength selection and advantages in reducing the discrepancy of the insertion loss between channels and upgrading

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IEEE Photonics Technology Letters  (Volume:18 ,  Issue: 17 )