面向水下应用的改进型光子计数通信方法

发布时间：2018-03-07 12:43

本文选题：光通信　切入点：水下通信　出处：《光学学报》2016年08期 　论文类型：期刊论文

【摘要】：水下激光通信由于受水体吸收和散射的影响,信号传输过程中能量衰减严重。基于光子计数的激光通信具有极高的探测灵敏度,是抑制信号衰减、提高通信距离的有效方法。传统的光子计数通信是通过检测单光子探测器有无电脉冲输出来实现通信数据还原的,通信误码率容易受到背景光噪声的影响。针对这一问题,提出并研究了一种改进方法,首先在通信接收端利用单光子探测器将光子转换为电脉冲,然后通过统计单位比特时间内的电脉冲数目来还原通信数据。实验结果表明:提出的方法能够在通信波长为532nm、通信速率为50kb/s、信噪比为5.14的情况下,实现84.24bit-1的探测灵敏度。所提出方法能够为高灵敏度水下激光通信提供一种新的技术思路。
[Abstract]:Under the influence of water absorption and scattering, the energy attenuation in the signal transmission process is serious. The laser communication based on photon counting has extremely high detection sensitivity, which is to suppress the signal attenuation. The traditional photon counting communication is realized by detecting whether the single photon detector has electrical pulse output to restore the communication data. The error rate of communication is easily affected by the background light noise. In this paper, an improved method is proposed and studied. Firstly, a single photon detector is used to convert the photon to an electric pulse at the communication receiver. The experimental results show that the proposed method can be used in the case of 532 nm communication wavelength, 50 kb / s communication rate and 5.14 signal-to-noise ratio (SNR). The detection sensitivity of 84.24 bit-1 is realized. The proposed method can provide a new technique for high sensitivity underwater laser communication.
【作者单位】：中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室;中国科学院大学;西安电子科技大学物理与光电工程学院;
【基金】：国家自然科学基金(61231012,61378079) 中国科学院基金(CXJJ-14-M09,CXJJ-15Q064)
【分类号】：TN929.1

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