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

Gengxin Chen; Ziliang Ruan; Zong Wang; Pucheng Huang; Changjian Guo; Daoxin Dai; Kaixuan Chen; Liu Liu

doi:10.1364/PRJ.438816

Journals >Photonics Research >Volume 10 >Issue 1 >Page 8 > Article

Photonics Research
Vol. 10, Issue 1, 8 (2022)

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

Gengxin Chen¹, Ziliang Ruan¹, Zong Wang², Pucheng Huang², Changjian Guo^2、3, Daoxin Dai¹, Kaixuan Chen^2、3、4, and Liu Liu^1、*

Author Affiliations

¹State Key Laboratory for Modern Optical Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Hangzhou 310058, China

²Guangdong 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

³National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, China

⁴e-mail: chenkaixuan@m.scnu.edu.cn

show less

DOI: 10.1364/PRJ.438816 Cite this Article Set citation alerts

Gengxin Chen, Ziliang Ruan, Zong Wang, Pucheng Huang, Changjian Guo, Daoxin Dai, Kaixuan Chen, Liu Liu. Four-channel CWDM device on a thin-film lithium niobate platform using an angled multimode interferometer structure[J]. Photonics Research, 2022, 10(1): 8 Copy Citation Text

EndNote(RIS)

BibTex

Plain Text

show less

Abstract

A compact and high-performance coarse wavelength-division multiplexing (CWDM) device is introduced with a footprint of

2.1 mm \times 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.