Analysis of fiber loss in large angle laser parameter measurement

Jie Luo; Laian Qin; Zaihong Hou; Wenlu Guan; Feng He; Wenyue Zhu

doi:10.1117/12.2637837

15 November 2022 Analysis of fiber loss in large angle laser parameter measurement

Jie Luo, Laian Qin, Zaihong Hou, Wenlu Guan, Feng He, Wenyue Zhu

Proceedings Volume 12448, 5th Optics Young Scientist Summit (OYSS 2022); 124480R (2022) https://doi.org/10.1117/12.2637837
Event: 5th Optics Young Scientist Summit (OYSS 2022), 2022, Fuzhou, China

Abstract

To optimize the application of the array fibers in the measurement of large angle laser parameters, the fiber loss is analyzed specifically. And the quantitative method of the actual and available numerical aperture about the fiber is studied, which also represent the allowable incident angle of the laser of the measurement system. Firstly, the theoretical model of fiber loss is constructed, and the influences of incident angle, fiber bend and theoretical numerical aperture on loss are discussed. Secondly, the basic loss, which be seen as the background value, is measured experimentally; by which it is considered that the all-glass fiber with coating and protective layers is suitable for this application. Thirdly, combined with experiment and simulation data, the tolerable bend of the fiber is quantified: when the bend radius is more than 300 times the core radius, the loss can be unaffected by the degree of bend. Finally, how to deduce the actual numerical aperture from the theoretical numerical aperture is discussed. It is verified that there is a good linear correlation between them, and the fitting goodness reaches 0.9970. This paper provides pertinent and effective standards for the selection and arrangement of the array fibers, and offers a theoretical foundation for constructing large angle laser parameters measurement.

Citation Download Citation

Jie Luo, Laian Qin, Zaihong Hou, Wenlu Guan, Feng He, and Wenyue Zhu "Analysis of fiber loss in large angle laser parameter measurement", Proc. SPIE 12448, 5th Optics Young Scientist Summit (OYSS 2022), 124480R (15 November 2022); https://doi.org/10.1117/12.2637837

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