Dual-DPMZ-Modulator Bias Controller model 0054 is a device specially designed to control the bias positions for dual-DPMZ-modulator used for 80Gbit DQPSK applications. DQPSK (Differential quadrature phase-shift key) modulator can improve optical transmission properties such as total reach, dispersion tolerance, or spectral efficiency. Since the Dual DPMZl modulator is a combination of 2 phase modulators and 4 Mach-Zehnder modulators, there are six bias points requiring controllers. YY Labs’ Dual-DPMZ modulator bias controller has been developed especially for this kind of device.

- Three modulators can be controlled with one controller (1st, 2nd modulator at Null/peak mode, the 3rd at Quad);
- User selectable locking slope (NULL ? PEAK);
- One photodiodes are integrated in the controller.
- Two operation modes: calibration mode and locking mode;
- Both differential bias outputs and single side bias outputs are provided.
- Calibration-off mode for quick system setup in locking mode;
- All settings are remote through RS-232 computer interface
- Low profile (4” * 2.5” * 0.65”).