论文部分内容阅读
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。
A burst mode laser driver and its double loop power control circuit are designed for passive optical network (PON). A charge compensation and dynamic bias circuit is proposed to reduce the current rise and fall time of the laser driver and improve the output current capability. A double loop power control feedback circuit is proposed to solve the problem of average power and extinction ratio with temperature variation . Based on a 0.18μm RF CMOS process to complete the chip, the laser driver chip area of 1 600μm × 800μm. The test results show that the laser driver output bias current and modulation current up to 90 m A. The laser driver has a burst response turn-on time of less than 2 ns, a turn-off time of less than 1 ns, a transmit data rate of up to 2.5 Gbit / s and a jitter of 41 ps. The laser driver output average optical power has a stability of ± 0.26 d B and an extinction ratio stability of ± 1 d B. The laser driver meets the PON system’s laser output power and stability requirements.