Zhou Heng, Qiu Kun, Wang Leyang
Key Laboratory of Optical Fiber Sensing and Communication Networks, Ministry of Education, University of Electronic Science and Technology of China, Chengdu, China.
Opt Express. 2011 Mar 28;19(7):6048-63. doi: 10.1364/OE.19.006048.
A novel wavelength-correlating receiver for incoherent Optical Code Division Multiple Access (OCDMA) system is proposed and demonstrated in this paper. Enabled by the wavelength conversion based scheme, the proposed receiver can support various code types including one-dimensional optical codes and time-spreading/wavelength-hopping two dimensional codes. Also, a synchronous detection scheme with time-to- wavelength based code acquisition is proposed, by which code acquisition time can be substantially reduced. Moreover, a novel data-validation methodology based on all-optical pulse-width monitoring is introduced for the wavelength-correlating receiver. Experimental demonstration of the new proposed receiver is presented and low bit error rate data-receiving is achieved without optical hard limiting and electronic power thresholding. For the first time, a detailed theoretical performance analysis specialized for the wavelength-correlating receiver is presented. Numerical results show that the overall performance of the proposed receiver prevails over conventional OCDMA receivers.
本文提出并演示了一种用于非相干光码分多址（OCDMA）系统的新型波长相关接收机。基于波长转换方案，该接收机能够支持各种码型，包括一维光码以及时间扩展/波长跳变二维码。此外，还提出了一种基于时间到波长的码捕获同步检测方案，可大幅减少码捕获时间。而且，针对波长相关接收机引入了一种基于全光脉冲宽度监测的新型数据验证方法。给出了新提出接收机的实验演示，在无需光硬限幅和电子功率阈值处理的情况下实现了低误码率数据接收。首次给出了专门针对波长相关接收机的详细理论性能分析。数值结果表明，所提接收机的整体性能优于传统OCDMA接收机。
