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    • 1. 发明申请
    • System and method for reducing interferometric distortion and relative intensity noise in directly modulated fiber optic links
    • 用于减少直接调制光纤链路中的干涉失真和相对强度噪声的系统和方法
    • US20060078339A1
    • 2006-04-13
    • US10960159
    • 2004-10-07
    • Willie NgDavid PersechiniRobert Buckley
    • Willie NgDavid PersechiniRobert Buckley
    • H04B10/04
    • H04B10/504H01S5/06817
    • A laser transmitter with a feedback control loop for minimizing noise. The novel laser transmitter includes a laser, an external reflector adapted to form an extended cavity to the laser, and a feedback control loop adapted to detect noise in the laser and in accordance therewith, adjust the optical phase of the extended cavity such that the noise is at a desired level. The optical phase of the extended cavity is adjusted by adjusting an operating parameter of the laser, such as its bias current. In an illustrative embodiment, the feedback control loop is adapted to compute the rate of change of the noise with respect to bias current and in accordance therewith, adjust the bias current of the laser such that relative intensity noise and interferometric intermodulation distortion are simultaneously minimized.
    • 具有反馈控制回路的激光发射器,用于最小化噪声。 新颖的激光发射器包括激光器,适于形成到激光器的延伸空腔的外部反射器,以及适于检测激光器中的噪声的反馈控制回路,并且根据该激光器调节扩展腔体的光学相位,使得噪声 处于所需的水平。 通过调整激光器的工作参数(如偏置电流)来调节扩展腔的光学相位。 在说明性实施例中,反馈控制环路适于计算噪声相对于偏置电流的变化率,并且根据其调整激光器的偏置电流,使得相对强度噪声和干涉式互调失真同时最小化。