Affiliation:
1. Key Laboratory of Opto-Electronic Information Technology of Ministry of Education and Tianjin Key Laboratory of Integrated Opto-Electronics Technologies and Devices, School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
2. Peng Cheng Laboratory, Shenzhen 518038, China
Abstract
Microwave photonic links (MPLs) have long been considered as an excellent way for radio frequency (RF) transmission due to their advantages such as light weight, high bandwidth, low cost and large spurious-free dynamic range (SFDR). However, the effective mode-field area (Aeff) of the single-mode fiber (SMF) used in the traditional MPL is not large, so the MPL based on SMF have relatively strong nonlinearity, which limits the processing power of SMFs to a level of few milliwatts. Few-mode fibers (FMFs) have been applied in MPL as an alternative due to the larger Aeff, and photonic lanterns are used simultaneously to excite the high-order mode of FMFs for RF signal transmission. However, the photonic lantern could bring additional insertion loss, and the production cost of FMFs is high, so we propose an MPL based on multimode fibers (MMFs) with mode field adapters (MFAs). Since MMFs have larger Aeff, the nonlinearity of the link can be greatly reduced. And matched MFAs realized by reverse tapering, to excite only the fundamental mode in MMFs to reduce the crosstalk, which are very stable. As a result, the stimulated Brillouin scattering threshold and SFDR are improved by 5 dB and 14.5 dB, respectively.
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference17 articles.
1. Integrated Microwave Photonics;Marpaung;Nat. Photonics,2019
2. The analog local loop: A growing revolution in optical transmission;Bickers;J. Light. Technol.,1989
3. A single sideband phase modulated radio over fiber link with spurious-free dynamic range enhancement;Zhang;Micro-Opt. MOEMS,2021
4. Multidimensional Optimization of a Radio-Over-Fiber Link;Zhai;IEEE Trans. Microw. Theory Tech.,2021
5. Long-haul analog photonics;Urick;J. Lightw. Technol.,2011