FALC pro: Fast PID | TOPTICA Photonics AG

Concept	Fast PID regulator in external module for a DLC pro to lock one of TOPTICA’s TDLS laser to a frequency reference. Two configurations allow for best performance with either direct error signals or the phase comparison of two RF signals
Operation	Using the interface of the DLC pro*
Requirements	Requires CAN bus interface of MC+ module of DLC pro**
Fast circuit branch
Typically connected to	Modulation input of laser head
PIC regulator	Three integrator stages, two differential stages: PI³D²
Bandwidth	50 MHz (-3 dB)
Signal delay	< 10 ns
DC gain	-60 dB to +95 dB
Output voltage range	± 1.7 V at 50 Ω load
Output impedance	50 Ω
Flexibility	> 100,000 different transfer functions, spanning 8 decades of frequency, full access in remote operation

トプティカ社ではレーザー線幅制御のためのモジュールを幅広いラインナップでご提供しております。FALC pro、 FALC 110 や DigiLock 110 のような高帯域なレギュレーターは最大でサブヘルツの線幅まで到達した実績がございます。

Software update provided though DLC pro updates
Product Brochure: Optical Clocks
Product Brochure: Rydberg Flyer
TOPTICA Python Laser SDK (updated with every DLC pro software release) makes the command interface of the DLC pro including the FALC pro easily available in Python
Technical drawing FALC pro

Slow circuit branch
Typically connected to	Input of DLC pro
Regulator	Single integrator stage, independent of fast branch
Bandwidth	15 kHz
Output voltage range	± 3.7 V at loads > 1 kΩ
Output impedance	50 Ω, although intended for high-impedance loads
Flexibility	12 steps of slew rate, spanning 7 decades of frequency, full access in remote operation
Configuration for direct error signals
Layout	Two high-speed low-noise inputs, connected to a differential amplifier
Typical application	Side-of-fringe locks, error signals generated by demodulation
Input noise density	< 3.0 nV/√ Hz
Input voltage range	± 0.36 V for lowest noise, ± 1.8 V for largest range
Input impedance	50 Ω, high impedance (10 kΩ) optional
Configuration for phase locks
Layout	Two RF inputs connected to an integrated low-noise mixer
Typical application	Phase locks, generation of a PDH error signal
Frequency range	5 MHz .. 200 MHz
Optimum LO input level	-8 .. -5 dBm
Abs. max. AC input level	RF input: +17 dBm, LO input: +13 dBm
Input impedance	50 Ω (AC-coupled)
General
Mounting options	Optical breadboards: May be mounted vertically or horizontally to both, metric and imperial*** Each T-RACK can take up to six FALC pro.
Size	54.2 x 105 x 200 mm³ (H x W x D) without mounting brackets***
Weight	900 g
Power supply	Either through CAN bus from DLC pro (one FALC pro per DLC pro only) or 100 - 240 V~, 50 / 60 Hz (power supply adaptor included)
Power consumption	~ 6 W