Pound-Drever-Hall Signal Unit: PDH-1000-5C
The Pound-Drever-Hall error signal is a pillar of modern laser frequency stabilization.
Our fully-integrated PDH unit helps you achieve ultralow noise error signals without the need for bulky RF generators or long, lossy RF delay lines. We’ve combined a fast transimpedance amplifier, an RF output signal driving an EOM phase modulator, and lock-in detection in an RF-shielded enclosure to generate a crisp, clean PDH error signal. We offer full customization, from choice of fiber-coupled or free-space photodetector in silicon, InGaAs, or extended InGaAs.
The best cavity locking starts with the best error signals
Performance & Specs
| Operating Wavelengths | 500-2050 nm | Chosen at time of order |
| Photodetector input noise | < 7 pA/ √Hz | |
| Modulation output frequency | 5 MHz standard | Up to 50 MHz custom |
| Modulation output amplitude | 4 Vpp | Adjustable via front panel |
| Error Signal amplitude | 300 mVpp (typical) | Some board adjustment of gain is available. |
| Error Signal ripple | < 15 mV | Includes components from fmod and 2xfmod |
| Dimensions | 75 x 125 x 70 mm (H) | M6 mounting hole provided |
Features
- Compatible with any laser stabilization system
- Fully-integrated detector, RF oscillator, and filter in a compact, RF-shielded package
- Generates RF output signal to drive an external EOM phase modulator
- Phase of local oscillator adjustable over 160 degrees from front panel
- Generate robust, ultralow noise PDH error signals
Applications
- Cavity frequency stabilization
- Can be modified for residual amplitude modulation detection
Customization Options
- Fiber-coupled or free-space photodetector
- Choice of silicon, InGaAs, or extended InGaAs photodetector
- Modulation frequency may be chosen at time of order, up to 50 MHz