Multichannel Multimode Filtering and Format Conversion Based on Few-Mode Fiber Bragg-Grating
- Resource Type
- Conference
- Authors
- Tan, Junjie; Cao, Hui; Zhou, Fasheng; Atai, Javid
- Source
- 2023 7th International Conference on Communication and Information Systems (ICCIS) Communication and Information Systems (ICCIS), 2023 7th International Conference on. :86-90 Oct, 2023
- Subject
- Communication, Networking and Broadcast Technologies
Optical filters
Optical fibers
Filtering
Refractive index
Wavelength division multiplexing
Optical variables control
Optical fiber communication
Bragg grating
optical communication system
filtering
format conversion
- Language
- ISSN
- 2837-4924
We propose a novel few-mode fiber Bragg grating (FM - FBG), which can perform filtering at target wavelengths for both LP 01 and LP 11 . The FM-FBG is designed by carefully choosing the specification of a few-mode fiber (FMF) to fulfil the requirement of the effective refractive index difference between LP 01 and LP 11 based on the applied channel spacing of the wavelength division multiplexing - mode division multiplexing (WDM-MDM) optical system. Numerical results show that the reflection channels of LP 01 and LP 11 are well-overlapped at target wavelengths. We also design a FM-FBG to implement four-channel at 40Gbit/s 300-GHz-spaced return-to-zero (RZ) to non-return-zero (NRZ) format conversion for LP 01 and LP 11 . The eye diagrams of the converted NRZ signals are found to be clean and open. These indicate that FM - FBGs have great potential for filtering and format conversion in WDM-MDM optical systems.