FSC Fast Servo Controller
The MOGLabs FSC fast servo controller provides high bandwidth low latency PID/PI2D feedback control for linewidth narrowing and frequency locking with a highfinesse optical cavity.
Front-panel controls of all loop parameters make it very easy to use: no fiddling with hidden rotary switches or trimpots.
Parallel FAST and SLOW control loops are designed for feedback to laser current and piezo. An internal ramp generator allows convenient scanning to find a peak, with simple scan/lock switch to lock.
Two photodiode power supplies are included, with standard Thorlabs-style connectors. A companion high-speed ultralow-noise photodetector suitable for PDH cavity locking is also available.
Features
- Low latency (<40ns)-High bandwidth
- Intuitive controls
- Auto-lock to centre of oscilloscope trace
- Two oscilloscope trace selector switches
- Two parallel feedback loops
- PID/PI2D loop shaping
- Ramp generator
- High-bandwidth external modulation
- Low-noise photodiode power supplies (±12V)
Applications
- Laser frequency stabilisation
- Linewidth narrowing
- Optical cavity locking
- Beatnote offset locking
Specifications
General
Bandwidth (fast output)
>35 MHz (–3 dB)
Propagation delay
< 40ns
External modulation
0 – 35MHz (–3 dB)
Sweep mode
Internal or external
Internal sweep rate
Adjustable, 1 – 50Hz
Monitor outputs
2 selectable monitors, ± 5V
Inputs
A in, B in
SMA, 1MΩ, ± 2.5V
External sweep
SMA, 1MΩ, 0 to 2.5V, 10kHz bandwidth
External gain control
SMA, 1MΩ, ± 1.0V
External fast modulation
SMA, 1MΩ, ± 1.0V
Input noise
< 5.5nV/√Hz
Error offset
± 450mV
TTL lock input
3.5mm stereo jack, active low
Servo controls
Servo type
Independently configurable fast and slow servos, can be nested
Controller action
Slow: I or I2, Fast: PID
Slow gain
-20dB to +20dB
Slow integrator
Off, 25Hz – 1kHz
Fast gain
-14dB to +46dB
Fast integrator
Off, 10kHz – 2MHz
Fast differentiator
Off, 100kHz – 10MHz
Fast differentiator gain limit
0 – 24dB
Adjustable low-pass filter
Off, 25kHz – 200kHz
Fast gain limit
Off, 0 – 60dB
Slow output
SMA, 0 - 5V, 50Ω impedance
Fast output
SMA, ± 2.5V, 50Ω impedance
Power and dimensions
IEC input
100 or 110/120 or 220/240V, 50/60 Hz, 3A
Photodiode supply output
±12V, 150mA, M8 connector
Power consumption
< 10W
Dimensions
250x79x 292mm (W x H x D), 2kg
描述 [描述] 为线宽窄化和频率锁定提供了高带宽、低延迟的PID/PI2D反馈控制。