不同入射角激光束在大芯径SI-PDF光纤中的传输损耗

张美; 魏福利; 邱孟通; 王奎禄; 王培伟; 盛亮; 彭博栋; 李志来

光学精密工程, 2009, 17 (10): 2406, 网络出版: 2010-08-31

不同入射角激光束在大芯径SI-PDF光纤中的传输损耗

Transmission attenuation of laser beams with different incident angles in large-core SI-PDF optical fibers

论文大纲

张美 ^1,*魏福利 ¹邱孟通 ¹王奎禄 ¹王培伟 ¹盛亮 ¹彭博栋 ¹李志来 ²

作者单位

¹ 西北核技术研究所，陕西西安 710024

² 中国科学院长春光学精密机械与物理学研究所,吉林长春 130033

SI-PDF光纤漏泄模式光线光线投影积分法损耗系数 large-core optical fiber tunneling ray light-ray projection integral method loss coefficient

摘要

为得到纯石英阶跃光纤(SI-PDF)中漏泄模式光线功率的传输特性，应用光线投影积分法，推导了不同入射角的激光束在大芯径SI-PDF光纤中的传输功率计算公式，在不同入射角激光束照射下，分别对3、67、140 m SI-PDF光纤的输出功率特性进行了理论和实验研究，用最小二乘法原理对对数坐标下的实验数据进行拟合，得出了损耗系数。结果表明：入射角在0～12°内时，不同入射角功率输出和损耗系数近似一常量，其中损耗系数约为13 dB/km；入射角＞12°时，不同入射角光功率随入射角增加呈指数衰减规律，其损耗系数随入射角增大而增大，在12°时损耗系数值为26 dB/km，在28°时达到了82 dB/km。

Abstract

In order to obtain transmission property of tunneling rays in a short length large-core SI-PDF fiber, a formula is derived by a light-ray projection integral method to calculate the power coupled from laser beam with different incident angles in the SI-PDF fiber. The output power characteristics of laser beams of 3,67,140 m length fibers at different incident angles are achieved respectively by measurements and theoretic calculations. The loss coefficiens are obtained by the least square fitting to experimental data at a logarithm coordinate. Results show that the coupled power and the loss coefficients with different incident angles in the SI-PDF fiber keep almost a constant at 0~12°,and the coupled power goes down exponentially with different incident angles beyond 12°.Moreover,the loss coefficients increase with increase of incident angles,it is 26 dB/km at 12° and 82 dB/km at 28°。

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张美, 魏福利, 邱孟通, 王奎禄, 王培伟, 盛亮, 彭博栋, 李志来. 不同入射角激光束在大芯径SI-PDF光纤中的传输损耗[J]. 光学精密工程, 2009, 17(10): 2406. ZHANG Mei, WEI Fu-li, QIU Meng-tong, WANG Kui-lu, WANG Pei-wei, SHENG Liang, PENG Bo-dong, LI Zhi-lai. Transmission attenuation of laser beams with different incident angles in large-core SI-PDF optical fibers[J]. Optics and Precision Engineering, 2009, 17(10): 2406.

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