| 测量光纤吸收损耗和散射损耗的一种简单有效方法 |
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| 引用本文： | 王桂芬,马根源.测量光纤吸收损耗和散射损耗的一种简单有效方法[J].南开大学学报,1995,28(4):64-71. |
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| 作者姓名： | 王桂芬 马根源 |
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| 作者单位： | 南开大学物理系 |
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| 摘 要： | 我们使用光声光谱方法研究了光纤的损耗。在理论上分别给出了光纤的吸收和散射所产生的光声信号的表达式，以及吸收系数和散射系数的计算公式。测量了在５１４．５ｎｍ和６３２．８ｎｍ波长上的光吸收和光散射的光声频率特性曲线及校正绝对吸收系数用的康铜丝的光声频率特性曲线，其实验曲线斜率均与理论计算值接近。我们也计算了芯径为０．８ｍｍ，长略大于２０ｃｍ的塑料光纤在６３２．８ｎｍ的吸收损耗为９．２９ｘ１０－４ｃｍ－１（合４０６ｄＢ／Ｋｍ），这与国外报导的吸收损耗的测量结果一致。
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| 关 键 词： | 光声效应 吸收损耗 散射损耗 光纤 测量 |
A SIMPLE EFFECTIVE METHOD FOR MEASUREMENT OF ABSORPTION LOSS AND SCATTERING LOSS OF OPTICAL FIBERS |
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| Wang Guifen, Ma Genyuan, Chen Wei, Gu Liqun, Zhang Guangyin.A SIMPLE EFFECTIVE METHOD FOR MEASUREMENT OF ABSORPTION LOSS AND SCATTERING LOSS OF OPTICAL FIBERS[J].Acta Scientiarum Naturalium University Nankaiensis,1995,28(4):64-71. |
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| Authors: | Wang Guifen Ma Genyuan Chen Wei Gu Liqun Zhang Guangyin |
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| Abstract: | The optical fiber loss was studied by using photoacoustics spectrascope. The expression of photoacoustic signal from fiber absorption and scattering,and further, the formular of absorption and scattering coefficient are theoretically derivated. We measured the photoacoustic frequency indicatrix of fiber absorption and scattering at 514nm and 632. 8nm, as well as constantan wire indicatrix which is used in the correction of absolute absorption coefficient. It is indicated that the slope of experimental curve is approach to the theoretical one. The absorption loss of a plastic optical fiber(0. 8mm diameter and over 20cm long) at 632. snm is also calculated from the experimental curve, and the result 9. 29x10-4cm-1(406dB/km) is consistant with the measured value from previous international report. |
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| Keywords: | photoacoustic effect absorption loss scattering loss optical fiber |
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