Refractive index measurement of optical waveguides using modified end-fire coupling method

Wan-Shao Tsai; Sheng-Chieh Piao; Pei-Kuen Wei

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Refractive index measurement of optical waveguides using modified end-fire coupling method

机译：修正端射耦合法测量光波导的折射率

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We present a modified end-fire coupling method to reconstruct two-dimensional index profiles of optical waveguides. The reconstruction is based on the measured differential optical fields and an inverse algorithm for the Helmholtz equation. The differential fields are obtained from spatially perturbed images recorded by a CCD camera. A closed-loop piezoelectric stage given a sinusoidal wave and an oil-immersion objective lens for high-resolution images are used in the measurement. A single-mode fiber and a Ti:LiNbO_(3) waveguide with known index profile at 632.8 nm are measured for demonstration. The measured index profiles agree quite well with core regions of known index profiles.

机译：我们提出了一种改进的端射耦合方法，以重建光波导的二维折射率分布。重建基于测得的差分光学场和Helmholtz方程的逆算法。差分场是从CCD摄像机记录的空间扰动图像中获得的。测量中使用给出正弦波的闭环压电镜台和用于高分辨率图像的油浸物镜。为了演示，对单模光纤和具有已知折射率分布在632.8 nm的Ti：LiNbO_（3）波导进行了测量。测得的折射率分布与已知折射率分布的核心区域非常吻合。

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《Optics Letters》 |2011年第11期|共3页
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Wan-Shao Tsai; Sheng-Chieh Piao; Pei-Kuen Wei;
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1. Refractive index measurement of optical waveguides using modified end-fire coupling method [J] . Wan-Shao Tsai, Sheng-Chieh Piao, Pei-Kuen Wei Optics Letters . 2011,第11期

机译：修正端射耦合法测量光波导的折射率
2. End-fire coupling of a SU-8 waveguide to a silicon mesa photodiode: Integrability in an optical analysis microsystem [J] . de la Fuente P, Etxeberria JA, Berganzo J, Sensors and Actuators, A. Physical . 2005,第0期

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3. Characteristics of Sensor Response of a Difference Interferometric Slab Optical Waveguide Refractive Index Sensor with a Prism Coupling Method [J] . Kin-ichi TSUNODA, Sae KIKUCHI, Kiyohisa NOMURA, Analytical Sciences . 1999,第3期

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机译：缩回文章：使用改进的有限元法通过使用改进的有限元方法，平面板光波导的分级/线性啁啾型折射率分布的波导色散特性
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机译：关于电离层中超短波折射的南北分量和光学厚度梯度的测量方法obodn metode izmereniya severno-yuzhnoy sostavlyayushchey refraktsii ukb v ionosfere i gradient a opticheskoy

Refractive index measurement of optical waveguides using modified end-fire coupling method

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