光纤模场直径测量的两段多项式函数拟合法

doi:10.16180/j.cnki.issn1007-7820.2021.11.006

Abstract

Abstract:

The mode field diameter of optical fiber is very important for evaluating the performance of optical fiber. The far-field variable aperture method is commonly used to measure the mode field diameter in industry. At present, more and more apertures are needed in various measuring instruments based on the far-field variable aperture method, which results in long measurement time and low efficiency. In view of this problem, this study uses the optical power data measured by the OFM optical fiber measuring instrument, and applies the two-stages polynomial function fitting method to the processing of the mode field diameter. The experimental results show that the stability of the measurement results at 20 apertures is better than that of the original direct fitting method. On the premise of meeting the measurement accuracy, the original 20 apertures can be reduced to 10 apertures. The proposed method improves the measurement speed of the instrument and can meet the needs of optical fiber manufacturers for rapid testing in on-site quality control.

Key words: fiber, mode field diameter, mode field distribution, optical output power, far-field variable aperture method, two-stages polynomial function fitting, aperture, measuring speed

CLC Number:

TN818

TAO Jiaqing,HU Yue,XIANG Huazhong,TU Jiankun,ZHENG Gang. A Method of Measuring Optical Fibers’ Mode Field Diameter Based on Two-Segments Polynomial Function Fitting[J].Electronic Science and Technology, 2021, 34(11): 37-41.

Figures/Tables 8

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Table 1

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References 19

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测试组	W_VAT/μm	W_OFM/μm
1	9.202	9.220
2	9.189	9.180
3	9.180	9.190
4	9.190	9.190
5	9.200	9.210
平均值	9.192	9.200
最大偏差	0.012	0.020

实验组数	W_VAT/μm	W_OFM/μm
1	9.190	9.210
2	9.230	9.230
3	9.220	9.210
4	9.191	9.210
5	9.199	9.200
平均值	9.208	9.212
最大偏差	0.022	0.018

实验组数	W_VAT/μm	W_OFM/μm
6	7.777	7.780
7	7.790	7.790
8	7.803	7.770
9	7.802	7.790
10	7.800	7.800
平均值	7.794	7.786
最大偏差	0.017	0.014

A Method of Measuring Optical Fibers’ Mode Field Diameter Based on Two-Segments Polynomial Function Fitting

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