The TFLN-NULL bias voltage controller from Plugtech is specifically designed for TFLN Thermo-optic (TO) MZ 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 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 TFLN-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.
The TFLN-NULL controller has a variety of output specifications to choose from, making it easy for users to deploy the controller to modulators of various voltage specifications. In addition, the TFLN-NULL controller supports UART command control, users can easily debug the system through GUI software, control scripts, etc.