Nondestructive measurement of an optical fiber refractive-index profile by a transmitted-light differential interference contact microscope.
Nondestructive measurement of an optical fiber refractive-index profile by a transmitted-light differential interference contact microscope.
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DOI：
10.1364/ao.43.001485
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发表时间：
2004-03
期刊：
影响因子：
1.9
通讯作者：
Zhongyao Liu;Xiaoma Dong;Qianghua Chen;Chunyong Yin;Yuxian Xu;Y. Zheng
中科院分区：
文献类型：
--
作者：
Zhongyao Liu;Xiaoma Dong;Qianghua Chen;Chunyong Yin;Yuxian Xu;Y. Zheng
介绍了一种新型透射光微分干涉衬度（DIC）系统，用于光纤折射率剖面（RIP）的无损测量。利用该系统，可以用检偏器对被测光束进行相位调制，通过计算各种干涉图样得到光纤的相位分布。介绍了该系统的测量原理、结构和典型应用。给出了梯度折射率光纤中RIP的测量结果。实验结果和理论分析表明，该系统具有较高的折射率分辨率和足够的测量精度，可用于光纤折射率的测量。由于采用共路设计，系统具有较强的抗环境干扰能力。此外，可以使用该系统测量沿着纤维轴的RIP并获取纤维的三维RIP的图像。
A novel transmitted-light differential interference contrast (DIC) system is used for nondestructive measurement of the refractive-index profile (RIP) of an optical fiber. By means of this system the phase of a measured light beam can be modulated with an analyzer, and the phase distribution of a fiber is obtained by calculation of the various interference patterns. The measurement theory and structure and some typical applications of this system are demonstrated. The results of measuring RIPs in graded-index fiber are presented. Both the experimental results and theoretical analysis show that the system takes the advantage of high index resolution and of sufficient measurement accuracy for measuring the refractive index of the optical fiber. The system has strong ability to overcome environmental disturbance because of its common-path design. Moreover, one can use the system to measure the RIP along the fiber axis and acquire an image of the three-dimensional RIP of the fiber.