High-bandwidth dual-loop control
Independent fast (current) and slow (piezo) feedback loops for precise stabilisation.
Description
The FSC is an ultra-fast PID servo controller for high-bandwidth laser locking,
with separate control loops for fast (typically diode current) and slow (usually piezo)
feedback for complete control of laser frequency.
Critical feedback parameters are easily adjusted using the front-panel control knobs for cavity locking,
linewidth narrowing or beatnote offset locking applications.
Compatible with all laser heads that include direct injection modulation
drivers that include external piezo control (such as the DLC).
A matched low-noise 30MHz photodetector, the PDA030,
can be powered directly from the FSC.
Optimised for laser locking applications
Supports cavity locking, linewidth narrowing, and beat-note stabilisation.
Intuitive front-panel control
Dedicated knobs allow real-time adjustment of critical feedback parameters.
Wide system compatibility
Works with lasers supporting current modulation and piezo control.
Integrated photodetector support
Can power compatible photodetectors such as our PDA030.
Features
- High-bandwidth PID or PI²D control
- All-analogue signal processing with propagation delay 40ns
- Parallel FAST and SLOW control loops
- Feedback to both current and piezo
- Flexible control of loop parameters
- High-bandwidth external modulation
- Internal ramp generator
- Two low-noise photodetector power supplies
- TTL control
System Integration
The FSC integrates with diode laser systems and external drivers to provide high-speed feedback control. It is typically used alongside laser controllers and photodetectors in advanced stabilisation setups.