Moku:Lab’s Laser Lock Box enables you to lock a laser’s frequency to a reference cavity or atomic transition using high-performance modulation locking and modulation-free 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. It also features an integrated 2‑channel oscilloscope, allowing you to observe signals at any point in the signal processing chain at up to 500 MSa/s.


Local oscillator frequency
1 mHz to 200 MHz (3.55 µHz resolution)

Scan frequency
10 MHz

Infinite impulse response low-pass or bandpass filter
1 kHz to 14 MHz corner frequency (second or fourth order)


Integrator crossover frequency
• 1.25 Hz to 125 kHz (fast PID)
• 19.53 mHz to 1.953 kHz (slow PID)

Ultra-fast data acquisition
• Snapshot mode up to 500 MSa/s
• Continuous mode up to 1 MSa/s

DAC resolution
16 bits

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

Key features

Maintain frequency lock with two independent 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 low-pass 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
Virtually probe within the signal processing chain to observe signals with the integrated 500 MSa/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

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


Pound-Drever-Hall technique

Precision spectroscopy

Gravitational wave detection

Custom phase-locked loop

Other closed-loop control systems


Moku:Lab Spec Sheet

Laser Lock Box Datasheet

User Manual
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.

Freedom in the lab when you need it

You’re not tethered to your bench with Moku software for iPad. Tap to lock your laser’s frequency while you move freely throughout the lab.

Try it in demo mode

High performance frequency stabilization

Moku:Lab replaces stand-alone 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:Lab hardware

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

Moku:Lab features a suite of twelve different instruments

Replace multiple pieces of equipment with a single device at a fraction of the cost.