PlugTech Precision Systems modulator bias controller is specially designed for MachZehnder modulators to ensure a stable operation state in various operating environments. Based on its fully digitized signal processing method, the controller can provide ultra stable performance.
Description An IQ modulator consists of three different modulators:I, Q arms are intensity modulators, P arm is a phase modulator. The IQ modulator is typically applied to coherent transmission systems. Plugtech Precision Systems’ modulator bias controller is specially designed for IQ modulators to ensure a stable operation state in various operating environments. Based on its fully digitized signal processing method, the controller can provide ultra stable performance. The controller injects a low frequency, low amplitude dither signal together with a bias voltage into the modulator. It keeps reading the output from the modulator and determines the condition of the bias voltage and the related error. A compensate bias voltage will be applied afterwards according to the previous measurements. In this way, the IQ modulator is ensured to work under a proper bias voltage.
Features
Provides three biases for IQ modulators
Modulation format independent: QPSK,QAM,OFDM,SSB verified
Plug and Play: No manual calibration needed Everything automatic
I,Q arms: control on Peak and Null modes High extinction ratio: 50dB max
P arm: control on Q+ and Q- modes Accuray: ± 2°
High stability: fully digital implementation
Easy to use: Manual operation with mini jumper Flexible OEM operations through UART
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