一种面向光收发器的ps级光脉冲产生器

由于高速光开关在光互连通信中越来越广泛的应用,光开关的开关速度直接影响了整个光链路的传输速率,因此对驱动光开关产生长周期窄脉冲光信号的驱动电路的性能及集成度有了更高要求。基于光电集成工艺和高速光脉冲队列技术的发展,提出了一种应用于光SerDes收发器的集成ps级窄脉冲光信号产生器。该产生器为CMOS电路产生脉宽精确可调的长周期窄脉冲,在SMIC 0.13μm CMOS工艺下可获得窄至25ps的脉冲输出,其电源电压范围宽达1.4V~2.5V,时钟频率也可由数kHz到4GHz,同时可移植到不同的CMOS工艺平台。

A ps level optical pulse generator in optical transceiver

As the application of the high speed optical switch is more and more popular in optical interconnection, the speed of the optical switch is directly related to the bit rate of the optical links. So the performance and integration requirement of driver circuit which drives the optical switch producing narrow optical pulse in a relative long cycle is more stringent. Depending on the breakthrough of single chip opto electrical integration and the advance of the optical pulse train generator technique, anopto electrical integration ps level optical pulse generator used in optical transceiver is proposed, which is based on optical serializer/deserialier (SerDes). The generator, made up of CMOS integration circuit, produces narrow optical pulses with a precisely adjustable width, which is used in the transceiver with optical SerDes. The generator outputs pulses as narrow as 25 ps width in SMIC 0.13 μm CMOS library, the power voltage range is in 1.4 V~2.5 V, and the clock frequency is from several KHz up to 4 GHz. In addition, the circuit is easy to be transplanted to different CMOS process platform.