Ultra-Compact Low-Loss Modified N-Adjustable Bends

作     者：Zhang, Lichao Wang, Kaifeng Chen, Jiamin Ma, Tianjun Li, Wangzhe An, Junming Gou, Guangyang Liu, Chunxiu Cheng, Jianqun Qi, Zhimei Xue, Ning 

作者机构：Chinese Acad Sci Aerosp Informat Res Inst AIR State Key Lab Transducer Technol Beijing 100190 Peoples R China Univ Chinese Acad Sci UCAS Sch Elect Elect & Commun Engn Beijing 100049 Peoples R China Peking Univ Peoples Hosp Dept Spinal Surg Beijing 100044 Peoples R China Chinese Acad Sci Inst Semicond State Key Lab Integrated Optoelect Beijing 100083 Peoples R China Quanzhou Univ Informat Engn Sch Integrated Circuit Quanzhou 362000 Fujian Peoples R China 

出 版 物：《JOURNAL OF LIGHTWAVE TECHNOLOGY》 (J Lightwave Technol)

年 卷 期：2023年第41卷第9期

页      面：2792-2800页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 0702[理学-物理学] 

基　　金：National Key R&D Program of China [2021YFB3200600, 2020YFC2004500] National Natural Science Foundation of China (NSFC) [62073307, 62273321, 61675203, 62204243, 61774157, 81771388] CAMS Innovation Fund for Medical Sciences [2019-I2M-5-019] CAS Joint Fund for Equipment Pre Research [8091A140106] Shanghai Municipal Science and Technology Major Project [2021SHZDZX] 

主　　题：Bend losses n-adjustable bend photonic integrated circuits ultra-compact waveguide 

摘      要：Theintegration density of photonic integrated circuits (PICs) is significantly limited by the waveguide bend losses. Reducing waveguide losses by design of the geometry of waveguide bends is important for photonic integrated circuits. Currently, circular bend and Euler bend are the two most common bends used in bending waveguide designs. Amodified n-adjustable bend is proposed for ultra-small radius (= 2 mu m) by applying the widening width method to n-adjustable bends. Simulations and experiments indicate that the modified n-adjustable bends show excellent performances in bend loss when the radius is 0.5, 1.0, 1.5, and 2.0 mu m. In the experiments, the reduction of measured bend loss was from 0.8197 dB/90 degrees (Euler bend) to 0.0689 dB/90 degrees (modified n-adjustable bend) when radius equals 1.0 mu m, and from 0.1438 dB/90 degrees (Euler bend) to 0.0167 dB/90 degrees (modified n-adjustable bend) when radius equals 2.0 mu m. The modified n-adjustable bends are potential candidates for waveguide components in ultra-compact photonic integrated circuits.