Author Affiliations
Abstract
1 Wuhan National Lab for Optoelectrics, Huazhong University of Science and Technology, Wuhan 430074, China
2 Accelink Technologies Co., Ltd., Wuhan 430205, China
A bandwidth-tunable optical passband filter with tunable attenuation is proposed. The filter, composed of a transmission liquid crystal array and high-resolution diffraction grating, was successfully demonstrated based on the compact spatial light design. Experimental results showed that the bandwidth, wavelength, and attenuation could be tuned by controlling the voltage applied on the liquid crystal array. The insertion loss was less than 3 dB; the attenuation tuning range was from 0 to 15 dB. The bandwidth tuning range was from 50 to 5000 GHz, which covered the full C band. The filter can meet the technical requirements of colorless-directionless-contentionless-flexible reconfigurable optical add/drop multiplexer.
060.2605 Free-space optical communication 130.7408 Wavelength filtering devices Chinese Optics Letters
2018, 16(7): 070602
1 武汉邮电科学研究院, 武汉 430074
2 武汉光迅科技股份有限公司, 武汉 430205
提出一种基于液晶技术的新型WSC(波长选择交叉互连)结构设计,在传统1×N 波长选择交叉的基础上通过偏振态的复用实现2×4的WSC,可减少系统组网所需的器件数量,提高系统集成度,降低组网成本.理论分析与实验证明,该新型WSC整体插损＜5 dB,50 GHz栅格工作状态3 dB带宽＞40 GHz,与理论结果基本吻合.
可重构光分插复用 液晶 波长选择交叉互连 Reconfigurable Optical Add/Drop Multiplexer (ROADM liquid crystal WSC
1 华中科技大学 光电子科学与工程学院,湖北 武汉 430074
2 武汉光迅科技股份有限公司,湖北 武汉 430074
3 新一代光纤通信技术和网络国家重点实验室(筹),湖北 武汉 430074
波长选择开关(WSS)被认为是最重要的波长引擎技术,已成为运营商在下一代网络部署中的关键器件。提出了一种新型的波长选择开关结构,用基于一维的微电机系统(MEMS)转镜实现切换的功能和透射式MEMS衰减器技术实现无干扰(Hitless)功能,相对于使用二维MEMS转镜同时实现波长切换和Hitless功能的WSS。其具有技术成熟,成本相对低廉等优点。理论分析并数值模拟了该WSS的几个关键参数,实际制作并测试了这种新型的WSS,实现了最大衰减量约34 dB,插入损耗约6.4 dB,通道内色散变化范围为-1.64-6 ps/nm,与数值模拟结果能够较好地吻合。
波长选择开关 无干扰功能 微机电系统转镜 微机电系统衰减器
