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

Chen Jiang; Yunqi Liu; Ying Wan; Yanlv Lin; Chengbo Mou; Yuehui Ma; Kaiming Zhou

doi:10.1016/j.optlastec.2022.108159

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

Chen Jiang, Yunqi Liu^*, Ying Wan, Yanlv Lin, Chengbo Mou, Yuehui Ma, Kaiming Zhou

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

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- μm 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- μm waveband respectively due to the turning point coupling mechanism. Then, we propose and demonstrate a controllable linearly polarized orbital angular momentum (LP-OAM) 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.

Original language	English
Article number	108159
Journal	Optics and Laser Technology
Volume	152
Early online date	11 Apr 2022
DOIs	https://doi.org/10.1016/j.optlastec.2022.108159
Publication status	Published - Aug 2022

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China ( 62075124 , 61875117 ) and the National Key Research and Development Program of China (2020YFB1805800). Chen Jiang also acknowledges the China Scholarship Council for financial support.

Keywords

Dispersion turning point
Long-period gratings
Mode converter
OAM mode generator
Polarization-maintaining fibers

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10.1016/j.optlastec.2022.108159

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

abstract = "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- μm 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- μm waveband respectively due to the turning point coupling mechanism. Then, we propose and demonstrate a controllable linearly polarized orbital angular momentum (LP-OAM) 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.",

keywords = "Dispersion turning point, Long-period gratings, Mode converter, OAM mode generator, Polarization-maintaining fibers",

author = "Chen Jiang and Yunqi Liu and Ying Wan and Yanlv Lin and Chengbo Mou and Yuehui Ma and Kaiming Zhou",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China ( 62075124 , 61875117 ) and the National Key Research and Development Program of China (2020YFB1805800). Chen Jiang also acknowledges the China Scholarship Council for financial support. ",

year = "2022",

month = aug,

doi = "10.1016/j.optlastec.2022.108159",

language = "English",

volume = "152",

journal = "Optics and Laser Technology",

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TY - JOUR

T1 - Broadband and stable linearly polarized mode converter based on polarization-maintaining fiber long-period grating

AU - Jiang, Chen

AU - Liu, Yunqi

AU - Wan, Ying

AU - Lin, Yanlv

AU - Mou, Chengbo

AU - Ma, Yuehui

AU - Zhou, Kaiming

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China ( 62075124 , 61875117 ) and the National Key Research and Development Program of China (2020YFB1805800). Chen Jiang also acknowledges the China Scholarship Council for financial support.

PY - 2022/8

Y1 - 2022/8

N2 - 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- μm 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- μm waveband respectively due to the turning point coupling mechanism. Then, we propose and demonstrate a controllable linearly polarized orbital angular momentum (LP-OAM) 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.

AB - 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- μm 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- μm waveband respectively due to the turning point coupling mechanism. Then, we propose and demonstrate a controllable linearly polarized orbital angular momentum (LP-OAM) 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.

KW - Dispersion turning point

KW - Long-period gratings

KW - Mode converter

KW - OAM mode generator

KW - Polarization-maintaining fibers

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ER -

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

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Keywords

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