双环功率控制的突发模式激光驱动器

发布时间：2018-01-12 21:36

本文关键词：双环功率控制的突发模式激光驱动器　出处：《红外与激光工程》2017年02期 　论文类型：期刊论文

【摘要】：设计了一款应用于无源光网络(PON)的突发模式激光驱动器及其双环功率控制电路。提出一种电荷补偿和动态偏置电路,减小了激光驱动器电流上升和下降时间,提高了输出电流能力;提出一种双环功率控制的反馈电路,解决了平均功率和消光比随温度变化的问题。基于0.18μm RF CMOS工艺完成流片,激光驱动器芯片面积为1 600μm×800μm。测试结果表明,激光驱动器的输出偏置电流和调制电流分别可达90 m A。激光驱动器突发响应开启时间小于2 ns,关断时间小于1 ns,发送数据速率高达2.5 Gbit/s,抖动大小为41 ps。激光驱动器输出平均光功率稳定性为±0.26 d B,消光比稳定性为±1 d B。该激光驱动器满足了PON系统对激光器的输出功率和稳定性要求。
[Abstract]:A burst mode laser driver and its dual loop power control circuit for passive optical network (PON) are designed, and a charge compensation and dynamic bias circuit is proposed. The rising and falling time of the current of the laser driver is reduced, and the output current capacity is improved. A feedback circuit for double loop power control is proposed, which solves the problem that the average power and extinction ratio vary with temperature. The flow sheet is completed based on 0.18 渭 m RF CMOS process. The area of laser driver chip is 1 600 渭 m 脳 800 渭 m. The output bias current and modulation current of the laser driver can reach 90 Ma, respectively. The burst response time of the laser driver is less than 2 ns and the turn-off time is less than 1 ns. The data rate is up to 2.5 Gbit / s and the jitter is 41 ps.The average output power stability of the laser driver is 卤0.26 dB. The extinction ratio is 卤1 dB. The laser driver meets the output power and stability requirements of the PON system.
【作者单位】：中国科学院微电子研究所;
【基金】：国家科技重大专项课题(2013ZX02310)
【分类号】：TN929.1;TN248
【正文快照】： 0引言无源光网络(PON)是光纤接入网中一个高效低成本的解决方案,具备数据传输速率快、效率高和成本低等优点。激光器(LD)是PON中光网络单元(ONU)的重要组成部分,其器件特性对温度变化和自身老化非常敏感。激光驱动器及其功率控制电路用于驱动激光器[1],消除温度和老化对激光器

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