Four-channel CWDM device on a thin-film lithium niobate platform using an angled multimode interferometer structure  

作　　者：GENGXIN CHEN ZILIANG RUAN ZONG WANG PUCHENG HUANG CHANGJIAN GUO DAOXIN DAI KAIXUAN CHEN LIU LIU 

机构地区：[1]State Key Laboratory for Modern Optical Instrumentation,College of Optical Science and Engineering,International Research Center for Advanced Photonics,Zhejiang University,Hangzhou 310058,China [2]Guangdong Provincial Key Laboratory of Optical Information Materials and Technology,South China Academy of Advanced Optoelectronics,South China Normal University,Higher-Education Mega-Center,Guangzhou 510006,China [3]National Center for International Research on Green Optoelectronics,South China Normal University,Guangzhou 510006,China

出　　处：《Photonics Research》2022年第1期8-13,共6页光子学研究（英文版）

基　　金：National Major Research and Development Program (2019YFB1803902);National Natural Science Foundation of China (NSFC)(61961146003, 91950205);Guangdong Basic and Applied Basic Research Foundation(2021A1515012215);Science and Technology Planning Project of Guangdong Province (2019A050510039)。

摘　　要：A compact and high-performance coarse wavelength-division multiplexing(CWDM) device is introduced with a footprint of 2.1 mm × 0.02 mm using an angled multimode interferometer structure based on a thin-film lithium niobate(TFLN) platform.The demonstrated device built on a 400 nm thick x-cut TFLN shows ultra-low insertion losses of <0.72 dB.Measured 3 dB bandwidths are 12.1 nm for all channels,and cross talks from adjacent channels are better than 18 dB.Its peak wavelength positions comply with the CWDM standard with a channel spacing of 20 nm.The filter bandwidth of the proposed CWDM device can be tuned by adjusting the structural parameters.This demonstrated CWDM device will promote future realization of multi-channel and multi-wavelength transmitter chips on TFLN.

关 键 词：INTERFEROMETER channel CWDM 

分 类 号：TH744.3[机械工程—光学工程]