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汤俊雄, Tang Junxiong, Wang Qingji. Li Yimin, Zhang Liang. Gan Jianhua, Duan Minghao, Kong Jiankun, and Zheng Lemin
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-1年11月30日
We report a digital speace iptical communication svstem with new features both in the transmitting and in the receiving ends. The diode iaser source is stabilized to within=100kHz by locking its frequency to the transmission peak of a Faraday anomalous dispersion iptical filter FADOF1, The optical filter in the receiver usestwo FADOF's that are linked to eliminate the muitipeak strueture and achieve a single-peak bandwidth of i GHz. The detection sensitivity of this system is 23 times higher than that of a system with a traditional interference rilter.
Frequency locking., Faraday anomalous dispersion optical filter., Space optical communica-tion
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【期刊论文】Experimental study on optimization of the working conditions of excited state Faraday filter
汤俊雄, Liang Zhang, Junxiong Tang
Optics Communications 152 1998. 275-279,-0001,():
-1年11月30日
In this paper the existence of optimal frequency detuning in the pumping process of the excited state Faraday anomalous dispersion optical filter ESFADOF, also referred as active FADOF.is reported. We measured this detuning and its variation versus cell temperature. Moreover, the dependence of the ESFADOF transmission on the cell temperature and pumping power was also studied experimentally. On the basis of these results, the transmission of rubidium 775.9nm ESFADOF was raised by more than two orders of magnitude under optimized working conditions. q1998 Elsevier Science B.V. All rights reserved.
Excited state Faraday filter, Pumping process
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汤俊雄, 王江波, 段明浩, 李吉红
电子学报,2000,28(12):38~40,-0001,():
-1年11月30日
本文首次对反常色散原子滤光器在斜入射(0~π/ 2) 条件下的透过率、带宽和频移等特性进行了理论研究;本文还进行了斜入射的滤光器透射谱实验研究,与理论分析符合较好;这些为原子滤光器在卫星及空间光通信领域的宽视场角接收方案奠定了基础,该方案有利于空间瞄准及捕捉.
反常色散原子滤光器, 斜入射, 透射谱
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汤俊雄, 谢伟良
电子学报,2003,31(8):1245~1248,-0001,():
-1年11月30日
为了克服大气无线光信道中光强闪烁带来的长突发错误, 本文提出了一种基于光子计数的迭代译码方案,并分析基于大气无线光信道下的译码性能. 仿真结果表明,本方案不仅提高了系统的抗突发错误性能,并且与传统的信道交织+ 级连码方案相比,具有不引入信道交织时延和易于硬件实现的优点.
无线光信道, 光子计数, 迭代译码
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汤俊雄, 刘璐, 石珏, 张治国, 黄绮, 付盘铭
光学学报,2004,24(8):1079~1084,-0001,():
-1年11月30日
研究一种采用光折变多量子阱器件的无线光通信自差拍接收方案。与寻常相干接收方案相比,省去了中频跟踪电子系统;与量子阱器件零拍方案相比,采用中频窄带滤波器,提高了接收端机的输出信噪比。理论上研究了自差拍相干接收方案,从其物理机制出发,结合信噪比分析,探讨了影响相干接收方案的主要因素。建立了该方案的实验系统,并开展了有意义的实验研究。理论分析及实验结果表明,该方案对激光大气传输所引起的诸多不利影响皆有一定的抑制作用,因而有可能应用于卫星地面激光通信和地面无线光通信系统。
光纤通信技术, 光折变多量子阱器件, 差拍相干接收, 地面无线光通信, 星地激光通信
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