Author(s): Zhao, ZZ (Zhao, Zhizun); Li, Z (Li, Zhen); Niu, JQ (Niu, Jiaqi); Zhang, GL (Zhang, Gaolu); Chen, HL (Chen, Hongliang); Fu, X (Fu, Xin); Yang, L (Yang, Lin)

Source: PHOTONICS Volume: 9 Issue: 4 Article Number: 252 DOI: 10.3390/photonics9040252 Published: APR 2022

Abstract: In this paper, we design and experimentally demonstrate an eight-channel cascaded Mach-Zehnder interferometer (MZI) based Local Area Network (LAN) Wavelength Division Multiplexing (WDM) (de)multiplexerwith channel spacing of 800 GHz on a silicon-on-insulator. By cascading a three-stage MZI, eight target wavelengths are (de)multiplexed. The length difference of the thirdstage MZI delay arms is adjusted so that the output channels skip the guard band. In order to keep the central wavelength of each channel from shifting, we utilize a wide waveguide for the phase delay arm in MZI to achieve large fabrication tolerance, and the multi-mode interference (MMI) couplers as power splitters with weak dispersions. The measurement results of the fabricated device show the precise wavelength alignment over the whole working wavelength range.

Accession Number: WOS:000786241000001

eISSN: 2304-6732

Full Text: https://www.mdpi.com/2304-6732/9/4/252