宽光谱对称马赫曾德尔电光开关的优化与模拟.docVIP

 宽光谱对称马赫曾德尔电光开关的优化与 模拟# 郑传涛1，梁  磊1，闫云飞1，马春生1，张大明1，崔占臣2* 5 10 15 （1. 集成光电子学国家重点联合实验室吉林大学实验区，吉林大学电子科学与工程学院 长 春 130012； 2. 超分子结构与材料国家重点实验室，吉林大学化学学院 长春 130012） 摘要：通过采用两个对称相位发生器(PGC)同时取代两个传统 3 dB 耦合器，设计了一种新型 宽光谱 Mach-Zehnder 干涉仪(MZI)电光开关。利用给出的多元非线性最小均方优化算法，对 PGC 结构参数做了优化，有效补偿了由波长漂移造成的 MZI 电光区模式的相移漂移。在 1550 nm 中心波长下，所设计器件的电光区长度为 5 mm，ON 和 OFF 状态下的驱动电压分别为 0 和±0.925 V。优化后器件的输出光谱可达 350 nm (1380~1730 nm)，且在此光谱范围内，插 入损耗和串扰分别小于 5.91 和–30 dB，在 ON 和 OFF 状态间的消光比大于 24.5 dB。在同 等串扰水平下，该输出光谱范围约为传统 MZI 电光开关的 6 倍(后者为 60 nm)，并可达到我 们先前报道的基于单个 PGC 非对称 MZI 电光开关的 3 倍以上(后者为 110 nm)。本文给出的 宽光谱器件在光波分复用系统中任意波长信道的切换与路由方面具有较好的应用价值。 关键词：集成光学; 电光开关; 输出光谱; 插入损耗; 串扰 中图分类号：TN253 20 Optimization and simulation of a symmetric Mach-Zehnder electro-optic switch over a wide spectrum of 350 nm ZHENG Chuantao1, LIANG Lei1, YAN Yunfei1, MA Chunsheng1, ZHANG Daming1, CUI Zhanchen2 25 30 35 40 (1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China; 2. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China) Abstract: A novel improved wide-spectrum Mach-Zehnder Interferometer (MZI) electro-optic (EO) switch is proposed by using two phase generating couplers (PGCs) instead of two directional couplers (DCs). With the proposed non-linear least square optimization method, the PGCs structure is optimized, and the phase-shift variation resulting from the wavelength variation is sufficiently compensated. Under the central wavelength of 1550 nm, the driving voltages of the designed switch are as low as about 0 (ON state) and ±0.925 V (OFF state) with an EO region length of 5 mm. A wide spectrum more than 350 nm (1380~1730 nm) is achieved, and within this wavelength range, the crosstalk and insertion loss are less than –30 and 5.91 dB, respectively, and the extinction ratio between the ON and OFF state of the output port is larger than 24.5 dB. Under th