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    • 16. 发明申请
    • Thermal drift compensation system and method for optical networks
    • 光网络热漂补偿系统及方法
    • US20070036554A1
    • 2007-02-15
    • US11200295
    • 2005-08-09
    • Thomas Weaver
    • Thomas Weaver
    • H04B10/00
    • H04B10/66H04B10/0779H04B10/572
    • A system and method for detecting and correcting for thermal shifting of the passbands of an input filter of an optical receiver relative to the passbands of an output of an optical device, such as an optical router, where the router and the receiver are operating at remote locations and at different operating temperatures that cause thermal drifting of the passbands. In one implementation RF signals are impressed on optical signals transmitted by a transmitter to the optical router. Different frequency RF signals are impressed on each of the optical signals and the receiver uses the detected RF frequencies to cancel portions of optical signals that have drifted into adjacent passbands at the optical receiver. In another implementation a mechanically adjustable filter is employed at the receiver which is used to achieve a needed degree of shifting of the receiver passbands to compensate for passband misalignment between the router and the receiver. In another implementation multiple receive channels are employed for each router passband. The various described implementations allow for detecting and correcting of thermal misalignment between the router and receiver passband without the need for controlling the temperature of the router.
    • 一种用于检测和校正光接收机的输入滤波器的通带的热移位的系统和方法,其相对于诸如光路由器的光学设备的输出的通带,其中路由器和接收器在远程操作 位置和不同的工作温度,导致通带的热漂移。 在一个实现中,RF信号被发射机发送到光路由器的光信号上。 在每个光信号上施加不同的频率RF信号,并且接收机使用检测到的RF频率来消除在光接收器处漂移到相邻通带中的光信号的部分。 在另一实现中,在接收机处采用机械可调滤波器,其用于实现接收器通带的所需程度的移位以补偿路由器和接收机之间的通带失准。 在另一实施例中,对于每个路由器通带采用多个接收信道。 各种描述的实现允许检测和校正路由器和接收器通带之间的热失准,而不需要控制路由器的温度。