摘要
介绍了一种获取高速调制电信号的新方法-基于FPGA的高速电光选通系统.此系统分为选通脉冲和高压调控两个模块.选通脉冲模块由高速信号放大、FPGA延时、可控延迟传输线三个部分组成.利用FPGA高密度、高可靠性、可反复擦写和可以现场编程、灵活调制的特点,将整个系统的主要控制部分集成在FPGA中,并将延时分为数字延时和模拟延时两部分.然后利用FPGA实现数字延时,可控延时线实现模拟延时.经试验检测,高压部分可以产生重复频率1 Hz ～1 kHz ,步进1 Hz ,延时范围为0 ～1μs ,步进为1 ns ,幅度为8 000 V,前沿和后沿小于10 ns ,抖动小于1 ns的高压矩形电脉冲,从而满足各种电光调制系统中的需要.
A novel approach called high speed electro-optie gating system was introduced to obtain the high speed electrical modulation signal. The system consists of two modulesgating pulse module and high vohage modulation module. The gating pulse module includes high-speed signal amplifier, FPGA （Filed Programmable Gate Array） delayer and controllable delayed transmission-line. The integration of the significant control function into FPGA achieves a number of desired properties such as high density, high integrated, erasable, filed programmable, and modulation flexible. The overall delay was separated into digital delay and analog delay, which were finished by FPGA and controllable delayed transmission-line respectively. Experiments show that the system can generate a high-voltage rectangular electrical pulse with repetition frequency 1 Hz to 1 kHz, stepping l Hz, delay range from 0 to 1 μs, stepping lns, high voltage range from 0 V to 8 000 V, rising edge and falling edge within 10ns, iitter within lns. It can be applied to various electro optic equipments.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2009年第5期1091-1095,共5页
Acta Photonica Sinica
基金
Supported by National Hi-tech Project
