海洋湍流中的量子高斯-谢尔光束偏振模型

夏明超; 张逸新; 李烨; 武玉谦

doi:doi:10.3788/gzxb20164505.0501003

光子学报, 2016, 45 (5): 0501003, 网络出版: 2016-06-06

海洋湍流中的量子高斯-谢尔光束偏振模型

Polarization Model of Quantized Gaussian Schell-model Fields in an Oceanic Turbulence

论文大纲

夏明超 ^1,*张逸新 ^1,2李烨 ¹武玉谦 ¹

作者单位

¹ 江南大学理学院,江苏无锡 214000

² 江南大学江苏省轻工光电工程技术研究中心,江苏无锡 214000

摘要

研究湍流对海水光通信信道中传输的量子高斯-谢尔光束偏振度的影响.运用量子化场的惠更斯-菲涅尔原理, 构建湍流海水中量子化高斯谢尔光束的产生和湮灭算符. 基于海水折射率的空间功率谱,导出了量子高斯-谢尔光束的偏振度.数值结果表明：在参数给定条件下, 温度与盐度的比值从－4.5变化到－0.5时, 偏振度从0.75下降到0.20；接收光子数从20提高到50时, 偏振度从0.91提高到0.96；光源横向尺寸从0.02 m增大到0.12 m时, 偏振度从0.82提高到0.97；温度起伏对偏振度的影响高于盐度起伏的影响；提高发射光子数和增大发射孔径是扼制湍流干扰的有效方法.

Abstract

The effects of turbulence on the performance of the polarization degree of quantized Gaussian-Schell model beams propagating through oceanic optical communication channel were studied. The annihilation and creation operator of the linearly polarization quantized Gaussian Schell-beam were structured based on Huygens-fresnel principle of quantized field in oceanic water. An expression for the polarization properties of Gaussian Schell-model quantization fields propagating through the oceanic channel is derived based on the spatial power spectrum of the refractive index of ocean water. The numerical experimental results show that under given parameters, as the ratio of temperature and salinity contributions to the refractive index spectrum varies from －4.5 to －0.5, the polarization degree decreases from 0.75 to 0.21；when the number of receiving photon increases from 20 to 50, the polarization degree also increases from 0.91 to 0.96; when the source′s transverse size varies from 0.02 m to 0.12 m, the polarization degree changes from 0.82 to 0.97; the effects of temperature-induced polarization decrease is surpassing the effects of salinity fluctuations；increasing the launch photon number and the radius of the aperture are an effective way to mitigate turbulent disturbance.

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夏明超, 张逸新, 李烨, 武玉谦. 海洋湍流中的量子高斯-谢尔光束偏振模型[J]. 光子学报, 2016, 45(5): 0501003. XIA Ming-chao, ZHANG Yi-xin, LI Ye, WU Yu-qian. Polarization Model of Quantized Gaussian Schell-model Fields in an Oceanic Turbulence[J]. ACTA PHOTONICA SINICA, 2016, 45(5): 0501003.

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