Description
The Precision Ditherless Bias Controller (MBC-PDBC) is an OEM, standalone device designed for precise bias control in feedback loops. It provides accurate modulator biasing using a pilot tone mode to bring the modulator to the Quad position, followed by a ditherless mode to maintain that position.
The unit can also operate in manual mode to lock the bias to a specific working point without a pilot tone. The locking slope is adjustable via a jumper on the board. Built-in photodiodes provide feedback for real-time adjustments, while an external reference voltage can be applied upon request.
This controller ensures stable and precise locking, even when the modulator drifts out of the desired range, and can quickly bring the system back to the correct point. Its fast response, high dynamic range, and high accuracy make it ideal for applications such as Mach-Zehnder modulators and Fabry-Perot fiber control loop-back systems. The unit also features an alarming LED for overtuning, providing further system reliability.
Precision Ditherless Bias Controller
Specifications
| Product Type: | PDBC |
|---|---|
| Modulation Type: | DQPSK |
| Detector Input Power: | -10 dBm |
| Locking Slope: | Positive, Negative |
| Locking Mode: | Quad+, Quad-, Null, Peak Positions |
| Photodetector Type: | Unspecified |
| Tunability: | Tunable |
| Input Signal Current: | 0.1 mA |
| Locking Accuracy: | 2 Degrees |
| DC Bias Voltage: | -10 to +10 V |
| Modulation Depth: | 6 % |
| Pilot Tone Frequency: | 1 kHz |
| Positive Power Supply: | 15 V |
| Negative Power Supply: | -15 V |
| Positive Supply Current: | 120 mA |
| Negative Supply Current: | 90 mA |
| Operating Temperature: | 0 to +70 °C |
| Storage Temperature: | -40 to +80 °C |
| Dimension: | 3.3 x 2.2 x 0.5 inches |
Download Data Sheet
Features
- Ditherless Mode: No pilot tone required for continuous locking of the modulator
- High Dynamic Range: Provides precise control with high accuracy
- Fast Response: Quickly stabilizes the modulator at the desired working point
- Tunable: External voltage tuning option available in manual mode
- Built-in Photodiodes: Two photodiodes integrated for real-time feedback and adjustment
- Compact Design: Space-saving dimensions (3.3" x 2.2" x 0.5")
- Alarming LED: Indicates overtuning to prevent system instability
- Manual Mode: Lock the bias point manually without a pilot tone
Applications
- Mach-Zehnder (MZ) Modulators: Ideal for precise bias control in MZ modulator applications
- Fabry-Perot Fiber Control: Useful for feedback loop applications in Fabry-Perot systems
- Optical Communication Systems: Ensures optimal performance in high-precision communication setups
- Research and Testing: Essential in laboratory setups requiring accurate modulator bias control
- Fiber Optic Testing: Useful for testing and calibrating fiber optic modulator systems
Frequently Asked Questions
What is the Precision Ditherless Bias Controller used for?
Does the Precision Ditherless Bias Controller require a pilot tone?
What types of modulators is the Precision Ditherless Bias Controller compatible with?
Can the Precision Ditherless Bias Controller be manually controlled?
What is the operating temperature range of the Precision Ditherless Bias Controller?
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