Tunable optical delay line based on integrated grating-assisted contradirectional couplers  

作　　者：XU WANG YUHE ZHAO YUNHONG DING SANSHUI XIAO JIANJI DONG 

机构地区：[1]National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology [2]Department of Photonics Engineering, Technical University of Denmark

出　　处：《Photonics Research》2018年第9期880-886,共7页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(NSFC)(61475052,61622502);Fundamental Research Funds for the Central Universities(2017KFXKJC001)

摘　　要：Tunable optical delay lines are one of the key building blocks in optical communication and microwave systems.In this work, tunable optical delay lines based on integrated grating-assisted contradirectional couplers are proposed and experimentally demonstrated. The device performance is comprehensively improved in terms of parameter optimization, apodization analysis, and electrode design. Tunable group delay lines of 50 ps at different wavelengths within the bandwidth of 12 nm are realized with a grating length of 1.8 mm. Under thermal tuning mode, the actual delay tuning range is around 20 ps at 7.2 V voltage. At last, a new scheme adopting an ultra-compact reflector for doubling group delay is proposed and verified, achieving a large group delay line of 400 ps and a large dispersion value up to 5.5 × 10~6 ps∕(nm · km) within bandwidth of 12 nm. Under thermal tuning mode, the actual delay tuning range is around 100 ps at 8 V voltage.Tunable optical delay lines are one of the key building blocks in optical communication and microwave systems. In this work, tunable optical delay lines based on integrated grating-assisted contradirectional couplers are proposed and experimentally demonstrated. The device performance is comprehensively improved in terms of parameter optimization, apodization analysis, and electrode design. Tunable group delay lines of 50 ps at different wavelengths within the bandwidth of 12 nm are realized with a grating length of 1.8 mm. Under thermal tuning mode, the actual delay tuning range is around 20 ps at 7.2 V voltage. At last, a new scheme adopting an ultra-compact reflector For doubling group delay is proposed and verified, achieving a large group delay line of 400 ps and a large dispersion value up to 5.5 x 106 ps/（nm · km） within bandwidth of 12 nm. Under thermal tuning mode, the actual delay tuning range is around 100 ps at 8 V voltage. 2018 Chinese Laser Press

关 键 词：可调谐光延迟线 光通讯 通讯技术 发展现状 

分 类 号：TN929.11[电子电信—通信与信息系统] TN92[电子电信—信息与通信工程]