Broadband Circular Polarizer Based on Chirped Double-Helix Chiral Fiber Grating.

Linlin Xue, Bras Samuel Malumba Timoteo, Weiwei Qiu, Zhongpeng Wang

Abstract read

In one paragraph

Article in Materials (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed

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1 citing paper in PubMed.

A Simultaneous Measurement Sensor for Temperature and Curvature Based on Congruent Quasi-Helical Long-Period Fiber Grating.Sensors (Basel, Switzerland) · 2024
Article

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5 · Who and what money

Authors and funding

4 authors.

Linlin XueSchool of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China.

Bras Samuel Malumba TimoteoSchool of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China.

Weiwei QiuSchool of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China.

Zhongpeng WangSchool of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China.ORCID 0000-0002-8236-7054

Funding

National Natural Science Foundation of China 61405178National Natural Science Foundation of China 61505176Zhejiang Provincial key Natural Science Foundation of China LZ21F010001

6 · The paper itself

Abstract

We propose an all-fiber broadband circular polarizer based on leaky mode coupling and a phase-matched turning point (PMTP) in a chirped, double-helix, chiral, long-period, fiber grating (CLPG). The CLPG was coated with a material in which the refractive index was higher than that of the fiber cladding, enabling the coupling of the core mode to leaky modes to achieve a desired extinction ratio. The complex coupled-mode theory was employed to investigate the coupling mechanism and conditions under which the desired coupling efficiency could be achieved. Moreover, the PMTP in phase-matched curves, which resolved the conflict between the operating bandwidth and the grating pitch range of the CLPG and made a large bandwidth with a small grating pitch possible, was used in the design to achieve a compact structure. Finally, two broadband circular polarizers with an extinction ratio above 25 dB were simulated; one had a bandwidth of over 120 nm and a length of 3.5 cm, and the other had a bandwidth of over 300 nm and a length of 8 cm.

Indexed as

broadbandchiral fiber gratingcircular polarizerleaky mode coupling

Identifiers

PMID35591699

DOI10.3390/ma15093366

PMCPMC9100753

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