【作者】 赵海龙；

【导师】 金杰；

【作者基本信息】 天津大学 ， 电磁场与微波技术， 2009， 硕士

【摘要】 具有动态配置能力的可重构光分插复用器(ROADM)是实现全光智能网络的重要器件,如何提高其调谐速度以适应高速的光网络数据传输是当前研究的热点和难点。基于电光调谐的ROADM是一种新型的设计方案,它通过改变加在其电光光栅上的电压偏置而实现指定波长的偏振转换,进而实现载波信号的快速上载和下载,其调谐速度可高达纳秒量级。本论文专为电光调谐型ROADM的偏振转换部分设计了一个电压智能控制模块。它采用FPGA作为模块控制单元,通过控制25路双通道超高速数模转换器(DAC),可同时实现50路变化幅度为±5V、变化精度为0.1V的稳定电压输出。待转换数据预先初始化到25个FPGA内部定制的RAM中,转换时通过多路并行方式读取到DAC中,进而实现50路电压的并行输出,并将整个模块的响应时间严格控制在纳秒量级。上位机的控制信息可通过RS-232接口传到FPGA中,以根据实际上载/下载波长需求动态配置模块输出电压值。本论文将智能控制模块设计细分为控制电路、数模转换(DAC)电路、接口电路和电源模块四部分进行详细的介绍。论文中相继完成了智能控制模块的方案设计及论证、元器件选型、原理图设计、PCB设计、系统信号完整性分析等工作。最后,还设计制作了测试文件对模块实际性能进行测试,验证了ROADM智能控制模块设计的正确性和可行性。更多还原

【Abstract】 The Reconfigurable Optical Add/Drop Multiplexer (ROADM), which can be distributed channels dynamically, is indispensable for All Optical Intelligent Networks. Researchers are trying their best to improve the tuning speed in order to adapt the fast optical data transmission. The electro-optical tunable ROADM is a novel design. It can convert the specified wave’s polarization by controlling the bias voltages on the electro-optical grating, making it upload and download carriers speedily, and the tuning time is limited to nanoseconds.This thesis presents a voltage intelligent control module, which is design for the tunable polarization convert part of the electro-optical ROADM specially. It uses the FPGA as a control unit, after controlling the 25 dual-channel ultra-high-speed Digital-to-Analog Conversion by FPGA, the module can output 50 different voltages at the same time. These voltages can change between +5V and -5V in the accuracy of 0.1V. Data have been stored in 25 internal RAMs of FPGA before conversion, so voltages are output in multi-channel and the response time of the module can be strictly limited in nanosecond grade. Control commands from PC can be received through RS-232 interface, making the output voltages can be configured dynamically as needed.In this thesis, the intelligent control module is divided into control circuit, Digital-to-Analog Conversion (DAC) circuit, interface circuit and power supply circuit for detailed introduction. And much work have been completed, such as the program design and verification of the module, component selection, schematic design, printed circuit board design, signal integrity analysis, etc. Finally, a testing program is produced to test the module’s actual performance.更多还原