System for controlling bias current in laser diodes with improved switching rates
    3.
    发明授权
    System for controlling bias current in laser diodes with improved switching rates 有权
    用于控制激光二极管偏置电流的系统,具有改进的开关速率

    公开(公告)号:US06728276B2

    公开(公告)日:2004-04-27

    申请号:US10285203

    申请日:2002-10-30

    IPC分类号: H01S300

    摘要: The present invention relates generally to laser diodes, and particularly to an operational amplifier able to switch laser diodes on and off quickly without adversely affecting data transmission by the laser diodes. A differential amplifier included in an operational amplifier has a high transconductance when a laser diode is first turned on and a low, near constant transconductance when the laser diode is transmitting data. The operational amplifier is preferably incorporated in optoelectronic transceivers used in passive optical networks. Switching laser diodes on and off quickly enables more efficient use of network bandwidth in such passive optical networks.

    摘要翻译: 本发明一般涉及激光二极管,特别涉及能够快速地切换激光二极管的运算放大器,而不会不利地影响激光二极管的数据传输。 包括在运算放大器中的差分放大器当激光二极管首先导通时具有高跨导,并且当激光二极管正在传输数据时具有低的,接近恒定的跨导。 运算放大器优选地并入用于无源光网络的光电收发器中。 开关激光二极管快速启用可以更有效地利用这种无源光网络中的网络带宽。

    Operational amplifier for optical transceiver
    4.
    发明授权
    Operational amplifier for optical transceiver 有权
    光收发器运算放大器

    公开(公告)号:US07020170B1

    公开(公告)日:2006-03-28

    申请号:US10722087

    申请日:2003-11-25

    IPC分类号: H01S3/00

    摘要: An optoelectronic transceiver is provided that includes a laser driver in communication with an optical transmitter. The laser driver includes an operational amplifier having three stages and connected with an optical transmitter. The first stage includes a differential amplifier that receives a reference voltage input, corresponding to a desired magnitude of the optical transmitter voltage, and an optical transmitter voltage input, representing an optical output strength of the optical transmitter, and having transconductance that increases exponentially as a difference between the reference voltage and the optical transmitter voltage increases. The differential amplifier generates an output current based on the inputs. The second stage integrates the output current to generate a first output voltage. Finally, the third stage is configured to receive as input the first output voltage to generate a second output voltage approximately equal to the first output voltage, the second output voltage controlling an optical transmitter bias current.

    摘要翻译: 提供了一种光电收发器,其包括与光发射器通信的激光驱动器。 激光驱动器包括具有三级并与光发射器连接的运算放大器。 第一级包括差分放大器,其接收对应于光发射机电压的期望幅度的参考电压输入和表示光发射机的光输出强度的光发射机电压输入,并且具有以指数方式增加的跨导 参考电压和光发射机电压之间的差异增大。 差分放大器基于输入产生输出电流。 第二级集成输出电流以产生第一输出电压。 最后,第三级被配置为接收作为输入的第一输出电压以产生大致等于第一输出电压的第二输出电压,第二输出电压控制光发送器偏置电流。