Juarez Juan C, Young David W, Sluz Joseph E, Stotts Larry B
The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723, USA.
Opt Express. 2011 May 23;19(11):10789-96. doi: 10.1364/OE.19.010789.
A high-sensitivity modem and high-dynamic range optical automatic gain controller (OAGC) have been developed to provide maximum link margin and to overcome the dynamic nature of free-space optical links. A sensitivity of -48.9 dBm (10 photons per bit) at 10 Gbps was achieved employing a return-to-zero differential phase shift keying based modem and a commercial Reed-Solomon forward error correction system. Low-noise optical gain was provided by an OAGC with a noise figure of 4.1 dB (including system required input loses) and a dynamic range of greater than 60 dB.
已开发出一种高灵敏度调制解调器和高动态范围光学自动增益控制器（OAGC），以提供最大链路余量并克服自由空间光链路的动态特性。采用基于归零差分相移键控的调制解调器和商用里德 - 所罗门前向纠错系统，在10 Gbps时实现了-48.9 dBm（每比特10个光子）的灵敏度。一个噪声系数为4.1 dB（包括系统所需的输入损耗）且动态范围大于60 dB的OAGC提供了低噪声光学增益。
