Three-dimensional refractive index reconstruction of optical fibers based on single-element interferometer computed tomography

Wang Chi; Xie Xiangyu; Deng Ying; Luo Yun; Li Wei; Zhang Xia; Feng Guoying

doi:10.11884/HPLPB202234.220035

Volume 34 Issue 4

Mar. 2022

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Article Navigation > High Power Laser and Particle Beams > 2022 > 34(4): 041006

Wang Chi, Xie Xiangyu, Deng Ying, et al. Three-dimensional refractive index reconstruction of optical fibers based on single-element interferometer computed tomography[J]. High Power Laser and Particle Beams, 2022, 34: 041006. doi: 10.11884/HPLPB202234.220035

Citation:

Wang Chi, Xie Xiangyu, Deng Ying, et al. Three-dimensional refractive index reconstruction of optical fibers based on single-element interferometer computed tomography[J]. High Power Laser and Particle Beams, 2022, 34: 041006. doi: 10.11884/HPLPB202234.220035

Citation:

Wang Chi, Xie Xiangyu, Deng Ying, et al. Three-dimensional refractive index reconstruction of optical fibers based on single-element interferometer computed tomography[J]. High Power Laser and Particle Beams, 2022, 34: 041006. doi: 10.11884/HPLPB202234.220035

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Three-dimensional refractive index reconstruction of optical fibers based on single-element interferometer computed tomography

doi: 10.11884/HPLPB202234.220035

Wang Chi^1
,,
Xie Xiangyu¹,
Deng Ying²,
Luo Yun²,
Li Wei^{1
,
,},
Zhang Xia¹,
Feng Guoying^{1
,
,}

1.
Institute of Laser and Micro/Nano Engineering, College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
2.
Laser Fusion Research Center, CAEP, Mianyang 621900, China

Received Date: 2022-01-22
Rev Recd Date: 2022-03-04

Available Online: 2022-04-06

Publish Date: 2022-03-19

Abstract

Abstract

A computer tomography scheme based on single-element interferometer is proposed to measure the three-dimensional refractive index distribution of optical fiber. Based on the principle of microscopic imaging, the single-element interferometer improves the lateral resolution of the system. The phase is extracted by fast Fourier transform, and the refractive index distribution of the fiber is reconstructed by filtered back projection algorithm. Based on the proposed scheme, an experimental measurement device is built to actually measure the refractive index distribution of single-mode and multimode optical fibers. The results show that the measurement can simply and quickly obtain the full optical field data, has the advantages of being lossless and non-contact, and the optical path structure is compact and stable, which provides a new idea for the miniaturization of computed tomography equipment.
- interferometer,
- phase measurement,
- computed tomography,
- filtered back projection,
- refractive index of optical fiber

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References(34)

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