Measurement of refractive index in optical fiber prefabricated stick with scanning method

Hongying Zhou; Jiabu Chen; Qiu Gao

doi:10.1117/12.783633

27 November 2007 Measurement of refractive index in optical fiber prefabricated stick with scanning method

Hongying Zhou, Jiabu Chen, Qiu Gao

Proceedings Volume 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 67234E (2007) https://doi.org/10.1117/12.783633
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China

Abstract

The refractive index of optical fiber Prefabricated stick has great effect on the transmission characteristic of optical fiber. Consequently, it is necessary to measure the distribution of refractive index. In this paper, a new method is proposed to measure the distribution of refractive index, which uses a thin light beam to scan the optical fiber Prefabricated stick. When a thin light beam irradiates on the optical fiber prefabricated stick, the light is converged because the optical fiber prefabricated stick acts as a columnar lens. After passing by a series of refraction, the light passes through the optical fiber prefabricated stick. Based on the model of refractive index distribution in the optical fiber prefabricated stick, the theoretic output point can be calculated. At the same time, the practical light output point can also be got through experiments. An evaluation function can be constructed with these two values. The model of refractive index distribution in the optical fiber prefabricated stick can be corrected by Monte-Carlo method gradually. At last the evaluation function value will become very little and the practical refractive index distribution can be got.

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Hongying Zhou, Jiabu Chen, and Qiu Gao "Measurement of refractive index in optical fiber prefabricated stick with scanning method", Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 67234E (27 November 2007); https://doi.org/10.1117/12.783633

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KEYWORDS

Refractive index

Optical fibers

Refraction

Phase only filters

Charge-coupled devices

Polymer optical fibers

Optical testing

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