相移光纤光栅耦合系数控制
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摘要
为了通过遮挡法实现不同耦合系数π相移光纤光栅制作,分析了刻制过程中的相移形成原理,提出通过调整遮挡区长度和π相移周期次数控制π相移光纤光栅耦合系数的方法.采用传输矩阵法对刻制相移光纤光栅过程中的透射谱变化进行仿真计算,分析了不同光栅条纹可见度下遮挡区长度对相移光纤光栅透射谱的影响.基于不同遮挡区长度进行了相移光纤光栅制作实验,结果表明:通过调整遮挡区长度和π相移出现次数能够实现对相移光纤光栅耦合系数的有效控制.
In order to realize theπphase-shift fiber grating fabrication with different coupling coefficients by shielded method,the phase-shift principle is analyzed,and the method of controlling the coupling coefficient ofπphase-shifted fiber grating by regulating the length of shielded length and the number of occurrences ofπphase shift is proposed.The transmission matrix method is used to simulate the transmission spectrum change during the phase-shifted grating fabrication process.The influence of shielded length on the transmission spectrum of the phase-shifted fiber grating is analyzed under different grating fringe visibility.The phase-shifted fiber grating fabrication experiments are carried out based on different shielded length.The results show that the effective control of the phase-shift fiber grating coupling coefficient can be achieved by adjusting the shielded length and the number of phase shift cycles.
In order to realize theπphase-shift fiber grating fabrication with different coupling coefficients by shielded method,the phase-shift principle is analyzed,and the method of controlling the coupling coefficient ofπphase-shifted fiber grating by regulating the length of shielded length and the number of occurrences ofπphase shift is proposed.The transmission matrix method is used to simulate the transmission spectrum change during the phase-shifted grating fabrication process.The influence of shielded length on the transmission spectrum of the phase-shifted fiber grating is analyzed under different grating fringe visibility.The phase-shifted fiber grating fabrication experiments are carried out based on different shielded length.The results show that the effective control of the phase-shift fiber grating coupling coefficient can be achieved by adjusting the shielded length and the number of phase shift cycles.
引文
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[2] FOSTER S,CRANCH G,HARRISON J,et al.Distributed feedback fiber laser strain sensor technology[J].Journal of Lightwave Technology,2017,35(16):3514-3530.
[3] LI Dong-ming,CHEN Jun,GE Hui-liang,et al.Research of high sensitivity and anti-acceleration of DFB active fiber grating hydrophone[J].Chinese Journal of Lasers,2012,39(3):0305005.李东明,陈军,葛辉良,等.高灵敏度加速度抵消型分布反馈有源光纤光栅水听器研究[J].中国激光,2012,39(3):0305005.
[4] LI Dong-ming,CHEN Jun,GE Hui-liang,et al.Water sound sensor using the optical fiber grating sensitivity enhanced through side pressure and end surface pulling[J].Acta Optica Sinica,2012,32(5):29-36.李东明,陈军,葛辉良,等.侧面压迫式及端面拉伸式增敏光纤光栅水声传感器[J].光学学报,2012,32(5):29-36.
[5] TANG Bo,HUANG Jun-bin,GU Hong-can,et al.Distributed feedback fiber laser hydrophone used in flank array[J].Chinese Journal of Lasers,2016,43(8):0810002.唐波,黄俊斌,顾宏灿,等.应用于舷侧阵的分布反馈式光纤激光水听器研究[J].中国激光,2016,43(8):0810002.
[6] TANG Bo,HUANG Jun-bin,GU Hong-can,et al.Experimental research on DFB fiber laser hydrophone towed line array[J].Acta Photonica Sinica,2017,46(4):0406004.唐波,黄俊斌,顾宏灿,等.分布反馈式光纤激光水听器拖曳线列阵实验研究[J].光子学报,2017,46(4):0406004.
[7] FOSTER S,TIKHOMIROV A,ENGLUND M,et al.A 16channel fibre laser sensor array[C].Conference on Optical Fibre Technology/australian Optical Society,2006:FA4.
[8] HARRISON J,FOSTER S.Wavelength division multiplexing of 32distributed-feedback fiber lasers[C].In Advanced Photonics,2017:SeM3E.2.
[9] XU Tuan-wei,LI Fang,LIU Yu-liang,et al.Characteristic mode analysis of distributed feedback fiber lasers[J].Chinese Journal of Lasers,2007,34(10):1358-1362.徐团伟,李芳,刘育梁,等.分布反馈光纤激光器模式特性分析[J].中国激光,2007,34(10):1358-1362.
[10] FAN W,CHEN B,QIAO Q,et al.Influence of the UV-induced fiber loss on the distributed feedback fiber lasers[J].Optics&Laser Technology,2003,35(4):309-313.
[11] ZERVAS M,COLE M,LOH W,et al.Compensation of imperfect phase mask with moving fibre-scanning beam technique for production of fibre gratings[J].Electronics Letters,1995,31(17):1483-1485.
[12] SEJKA M,VARMING P,HUBNER J,et al.Distributed feedback Er3+-doped fibre laser[J].Electronics Letters,1995,31(17):1445-1446.
[13] LIU Hai-tao,CHEN Jian-ping,CHEN Xiang-fei,et al.Fabrication of distributed feedback Bragg fiber laser on regular Er-doped fiber[J].Chinese Journal of Lasers,2006,33(7):873-876.刘海涛,陈建平,陈向飞,等.低掺杂铒纤上分布反馈布拉格光纤激光器的制作[J].中国激光,2006,33(7):873-876.
[14] ZHU Qing,CHEN Xiao-bao,CHEN Jian-ping,et al.DFB fiber laser fabrication by moving phase mask[J].Optical Fiber&Electric Cable and Their Applications,2006,(1):17-21朱清,陈小宝,陈建平,等.相位掩膜板移动法制作DFB光纤激光器[J].光纤与电缆及其应用技术,2006,(1):17-21.
[15] TURAN E.Fiber grating spectra[J].Journal of Lightwave Technology,1997,15(8):1468-1488.