Broadband and stable linearly polarized mode converter based on polarization-maintaining fiber long-period grating

被引：10

作者：

Jiang, Chen ^{[1
,2
]}

Liu, Yunqi ^{[1
]}

Wan, Ying ^{[1
]}

Lin, Yanlv ^{[1
]}

Mou, Chengbo ^{[1
]}

Ma, Yuehui ^{[1
]}

Zhou, Kaiming ^{[2
]}

机构：

[1] Shanghai Univ, Shanghai Inst Adv Commun & Data Sci, Key Lab Specialty Fiber Opt & Opt Access Networks, Joint Int Res Lab Specialty Fiber Opt & Adv Commu, Shanghai 200444, Peoples R China

[2] Aston Univ, Aston Inst Photon Technol, Birmingham B4 7ET, W Midlands, England

来源：

OPTICS AND LASER TECHNOLOGY | 2022年 / 152卷

基金：

中国国家自然科学基金;

关键词：

Polarization-maintaining fibers; Long-period gratings; Mode converter; OAM mode generator; Dispersion turning point; ANGULAR-MOMENTUM GENERATION; VORTEX; BEAMS;

D O I：

10.1016/j.optlastec.2022.108159

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a broadband and stable linearly polarized mode converter by inscribing long-period grating (LPG) in few-mode polarization-maintaining fibers (FPMFs). The operating wavelength of the mode converter at 1.0- and 1.5- mu m waveband has been achieved by using PMF with different cut-off wavelengths. Theoretical and experimental demonstrated broadband linearly polarized mode conversion can be achieved with a maximum 10 dB bandwidth of 140- and 189- nm at 1.0- and 1.5- mu m waveband respectively due to the turning point coupling mechanism. Then, we propose and demonstrate a controllable linearly polarized orbital angular momentum (LPOAM) mode generator using a single LPG-based mode converter and a length of FPMF. The LP-OAM mode is produced by turning axial strain and can be smoothly switched between +/- 1 order. Our all-FPMF based grating fabrication offers a new option towards a stable and broadband polarized mode converter and LP-OAM mode generator for application in a few-mode fiber laser and communication system.

引用

页数：8

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