双环功率控制的突发模式激光驱动器-红外与激光工程.PDF

第46卷第2期 红外与激光工程 2017年2 月 Vol.46No.2 Infraredand LaserEngineering Feb.2017 双环功率控制的突发模式激光驱动器 朱铁柱，莫太山，叶甜春 (中国科学院微电子研究所，北京 100029) 摘 要院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0.18滋m RF CMOS工艺完成流片，激光驱动器芯片面积为1600滋m伊800滋m。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90mA。激光驱动器突发响应开启时间小于2ns，关断时间小于1ns，发 送数据速率高达2.5Gbit/s，抖动大小为41 ps。激光驱动器输出平均光功率稳定性为依0.26dB，消光比 稳定性为依1dB。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。 关键词院无源光网络； 激光驱动器； 突发模式； 双环功率控制 中图分类号院TN433 文献标志码院A DOI院10.3788/IRLA201746.0205001 Burst鄄mode laser diode driver with dual鄄loop power control Zhu Tiezhu, Mo Taishan, Ye Tianchu (Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China) Abstract: A burst鄄mode laser diode driver (LDD) with dual鄄loop power control circuit was designed for the passive optical network (PON) applications. The charge compensatio and dynamic bias circuit was employed to reduce the rising and falling time of the output current and enlarge the output current capability. A dual鄄loop power control feedback circuit was proposed to avoid the variations of average power and the extinctio ratio with temperature. The proposed laser diode driver was implemented i a 0.18滋m RF CMOS technology and the chip area was 1600滋m伊800 滋m. Experiment results show that the output bias current and the modulating current ca reach 90mA. The burst鄄o time of the LDD is less tha 2ns and the burst鄄off time is less tha 1ns with 2.5Gbit/s data transmitting rate and 41ps magnitude. The average power stabilityand the extinctio ratio stability of the LDD is 依0.26dB and 依1dB,