Simulation of random fiber Bragg grating array in polarization-maintaining fiber based on photonic localization effect  

作　　者：LI Zhihan HE Wei LI Shaode 

机构地区：[1]Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument,Beijing Information Science and Technology University,Beijing 100192,China [2]Beijing Laboratory of Optical Fiber Sensing and System,Beijing Information Science and Technology University,Beijing 100192,China

出　　处：《Optoelectronics Letters》2024年第8期460-471,共12页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52105540 and 51975044)。

摘　　要：Mid-infrared wavelength switchable and dual-wavelength random laser output has many potential applications.A polarization-maintaining random fiber Bragg grating(PMRFBG)array based on the photonic localization effect of longitudinal invariant transverse disorder in fiber structure is proposed,which can be used as random feedback of dual-wavelength and wavelength switchable output of random fiber laser(RFL).The random fiber Bragg grating(RFBG)array was designed on the panda-type polarization-maintaining fiber(PMF),and the two center wavelengths were 2151.60 nm and 2152.22 nm,respectively.The RFBG array was designed on the bow tie-type PMF,and the two center wavelengths were obtained,which were 2153.08 nm and 2153.96 nm,respectively.The RFBG array with a center wavelength of 2139.27 nm was designed on single-mode fiber(SMF).The length of individual fiber Bragg grating(FBG)and PMRFBG,the refractive index modulation depth,the number of cascaded gratings,and the distance between gratings have different effects on the full width at half maximum(FWHM)and reflectance of the RFBG and PMRFBG array,but not on the central wavelength,as obtained by simulation using the transmission matrix method.The designed PMRFBG array provides theoretical support for the design of the feedback mechanism of RFL.

关 键 词：fiber POLARIZATION RANDOM 

分 类 号：TN253[电子电信—物理电子学] TN248