Recently, space-division multiplexing （SDM） techniques using multi-core fiber （MCF） and few-mode fiber （FMF） have been introduced into optical fiber communication to increase transmission capacity. Two main type...Recently, space-division multiplexing （SDM） techniques using multi-core fiber （MCF） and few-mode fiber （FMF） have been introduced into optical fiber communication to increase transmission capacity. Two main types of optical fiber amplifiers based on the Erbium- doped fiber （EDF） and the Raman effect have been developed to amplify signals in the MCF and FMF. In this paper, we reviewed the principles and configurations of these amplifiers.展开更多
The up to date progress of fiber sensing technologies in Tianjin University are proposed in this paper.Fiber-optic temperature sensor based on the interference of selective higher-order modes in circular optical fiber...The up to date progress of fiber sensing technologies in Tianjin University are proposed in this paper.Fiber-optic temperature sensor based on the interference of selective higher-order modes in circular optical fiber is developed.Parallel demodulation for extrinsic Fabry-Perot interferometer(EFPI)and fiber Bragg grating(FBG)sensors is realized based on white light interference.Gas concentration detection is realized based on intra-cavity fiber laser spectroscopy.Polarization maintaining fiber(PMF)is used for distributed position or displacement sensing.Based on the before work and results,we gained National Basic Research Program of China on optical fiber sensing technology and will develop further investigation in this area.展开更多
文摘Recently, space-division multiplexing （SDM） techniques using multi-core fiber （MCF） and few-mode fiber （FMF） have been introduced into optical fiber communication to increase transmission capacity. Two main types of optical fiber amplifiers based on the Erbium- doped fiber （EDF） and the Raman effect have been developed to amplify signals in the MCF and FMF. In this paper, we reviewed the principles and configurations of these amplifiers.
基金This work was supported by National Basic Research Program of China(973 Program)under Grant No.2010CB327800.
文摘The up to date progress of fiber sensing technologies in Tianjin University are proposed in this paper.Fiber-optic temperature sensor based on the interference of selective higher-order modes in circular optical fiber is developed.Parallel demodulation for extrinsic Fabry-Perot interferometer(EFPI)and fiber Bragg grating(FBG)sensors is realized based on white light interference.Gas concentration detection is realized based on intra-cavity fiber laser spectroscopy.Polarization maintaining fiber(PMF)is used for distributed position or displacement sensing.Based on the before work and results,we gained National Basic Research Program of China on optical fiber sensing technology and will develop further investigation in this area.
