The MBC-NULL bias voltage controller from Plugtech is a high-performance automatic bias voltage controller specifically designed for MZ intensity modulators. Its principle involves injecting a dither signal into the modulator, continuously analyzing the modulator's working state, and adjusting the output DC bias voltage to compensate for the working point drift caused by external environmental changes. Thanks to its excellent control algorithm design, users can precisely lock the modulator at common Peak and Null working points through simple operations, allowing the modulator to maintain good working status for long periods. The MBC-NULL controller operates by default at the Null point. Its fully digital control method enables the controller to quickly lock onto the working point, ensuring the modulator outputs the maximum extinction ratio. Additionally, a specialized version of the controller is available for EOSpace’s Ultra High Extinction Ratio modulator, capable of automatic adjustment of both the DC Bias port and Tuning port. Please contact Plugtech for more information.
The MBC-NULL controller supports serial communication. Users can switch the controller's working mode (automatic/manual), customize the output voltage, adjust the dither signal amplitude, read system working parameters, and set special working points via GUI software or by sending standard commands.