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    • 47. 发明申请
    • Methods and systems for controlling optical power attenuation
    • 控制光功率衰减的方法和系统
    • US20070071451A1
    • 2007-03-29
    • US11238553
    • 2005-09-29
    • Paul SchatzDean ZavadskyWilliam MitchellSteve StuartAna Santos
    • Paul SchatzDean ZavadskyWilliam MitchellSteve StuartAna Santos
    • H04B10/00
    • H04B10/66
    • Methods and systems for controlling optical power attenuation are provided. A method comprises periodically measuring an optical power of an optical signal received by an optical receiver and periodically measuring a first attenuation control signal voltage. When the optical power measurement is outside a target power range, the method continues with calculating a target voltage necessary to maintain the optical power measurements at a target power level; calculating a second attenuation control signal based on the target voltage, wherein the second attenuation control signal is calculated to provide an over-damped transient response that maintains the second attenuation control signal within a usable range of a variable optical power attenuator; applying a second attenuation control signal voltage based on the second attenuation control signal to the variable optical power attenuator; and adjusting attenuation of the optical signal based on the second attenuation control signal voltage.
    • 提供了控制光功率衰减的方法和系统。 一种方法包括周期性地测量由光接收机接收的光信号的光功率,并周期性地测量第一衰减控制信号电压。 当光功率测量超出目标功率范围时,该方法继续计算将光功率测量保持在目标功率电平所必需的目标电压; 基于所述目标电压计算第二衰减控制信号,其中计算所述第二衰减控制信号以提供将所述第二衰减控制信号维持在可变光功率衰减器的可用范围内的过阻尼瞬态响应; 将基于第二衰减控制信号的第二衰减控制信号电压施加到可变光功率衰减器; 以及基于所述第二衰减控制信号电压来调整所述光信号的衰减。