Moku:Pro Laser Lock Box

Compare all laser lock boxes


The Moku:Pro Laser Lock Box enables you to lock a laser’s frequency to a reference cavity or atomic transition using high-performance modulation locking techniques. The Laser Lock Box includes a “Tap-to-Lock” feature, enabling you to quickly lock to any zero-crossing on the demodulated error signal. With Multi-instrument Mode, you can deploy up to four laser lock modules simultaneously. Each module shares the same clock base from the internal or an external source. This is the ideal solution for multi-laser stabilization systems.



Local oscillator frequency
1 mHz to 600 MHz (1 μHz resolution)

Scan frequency
Up to 10 MHz

Infinite impulse response lowpass or bandpass filter
2.6 kHz to 35 MHz corner frequency (second or fourth order)

Filter roll-off
12 dB / 24 dB per octave filter roll-off

Integrator crossover frequency
• 312.5 mHz to 3.125 MHz
• 988.2 mHz to 9.882 MHz (double integrator)

Ultra-fast data acquisition
• Snapshot mode up to 1.25 GSa/s
• Continuous mode up to 10 MSa/s

DAC resolution
16 bits

Input coupling

Key features

Maintain frequency lock with two PID controllers
Individually configure high- and low-bandwidth PID controllers for fast and slow feedback

Scan waveforms
Positive sawtooth, negative sawtooth, triangle

Post-demodulation filtering
Filter demodulated signals with up to fourth order infinite impulse response lowpass filters: Butterworth, Chebyshev, Chebyshev II, Elliptic, Cascaded, Gaussian, Bessel, Legendre

Block diagram view of the signal processing chain
Clear overview of the laser locking to aid control and understanding

Quickly lock to any zero-crossing in the error signal using the “Tap-to-Lock” feature

Onboard Oscilloscope
Probe within the signal processing chain to observe signals with the integrated 1.25 GSa/s oscilloscope

Stabilize a laser’s frequency to a reference cavity or atomic transition
Supported locking techniques include Pound-Drever-Hall (PDH) locking, heterodyne offset phase-locking, RF locking, and dither locking

Flexible configuration of the demodulation source
Demodulate signals with internal or external local oscillators; use the internal PLL frequency multiplier to demodulate up to the 250th harmonic or down to 1/8th of the fundamental frequency

Custom controls
Quickly access the controls you need with a palette view


Pound-Drever-Hall technique

Precision spectroscopy

Gravitational wave detection

Custom phase-locked loop

Other closed-loop control systems


Moku:Pro Spec Sheet

Moku:Pro's Laser Lock Box Datasheet

User Manual
Moku:Pro's Laser Lock Box User Manual

Software & APIs

Stabilize a laser's frequency to a reference cavity or atomic transition using high-performance modulation locking techniques, all from intuitive Moku software for iPad, or with APIs for Python, MATLAB, and LabVIEW.

Intuitive software and API integration

Moku: app for iPadOS provides a clear and dynamic user experience, making configuring, modifying, and debugging your setup easy.

API integration with Python, MATLAB, and LabVIEW allows straightforward automation of Moku:Pro in complex setups or for repetitive tasks.

Try the software

High performance frequency stabilization

Moku:Pro replaces standalone waveform generators, phase shifters, demodulators, filters, and PID controllers. Its high-performance digital signal processing, powerful visualization, and flexible user interface delivers an all-in-one solution for laser frequency stabilization.

Block diagram view

Get a bird’s-eye view of your control system and observe signals anywhere in the signal processing chain using the integrated oscilloscope. Use conditional triggering, synchronized scanning, and configurable output limiters optimized specifically for cavity stabilization systems.


Available on Moku:Pro hardware

The digital signal processing power of an FPGA coupled with the high-quality analog front-end ensures that with Moku:Pro you never have to sacrifice performance for flexibility.

Moku:Pro features a suite of eleven different instruments

Replacing the need for multiple instruments, Moku:Pro is the most powerful solution yet in software-defined instrumentation.