Accelerate optics and photonics research

Performing complex optical experiments like PDH locking can be tedious and time-consuming — so we laid it all out for you! Download our new ebook for a step-by-step walkthrough of modern laser stabilization techniques. 

Ebook: The ultimate guide to PDH locking
An engineer in a lab using Moku:Pro, holding an iPad

Test smarter with unmatched performance and versatility

Moku:Pro and other Moku devices integrate a full suite of instruments crucial for laser stabilization and measurement, like the Laser Lock Box and Lock-in Amplifier, while providing test essentials like an Oscilloscope and Waveform Generator. Thanks to the software-defined, multi-instrument platform, it's easy to integrate custom algorithms into your test sequence.

Seamless lock-in detection

Utilize the 4-channel, 600 MHz Lock-in Amplifier for multiple frequencies or harmonics. Achieve ultra-low noise performance with 10-bit and 18-bit blended ADCs.

Painless laser locking

Easily lock lasers to a cavity using the Laser Lock Box — no manual labor required! With Lock Assist, you can instantly lock to any zero-crossing on the demodulated error signal.

Better optical PLLs

The integrated PID Controller enables easy laser frequency stabilization and phase locking. Adjust parameters and view results in real time to optimize closed-loop control.
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Get your experiment up and running, faster

The Laser Lock Box supports PDH locking, fringe-side locking, tilt locking, RF locking, and dither locking. Combine the Laser Lock Box with additional instruments in Multi-instrument Mode to further tailor your instruments to your research without needing to buy additional equipment. Watch the video to learn more.

Engineered for demanding applications. Like yours.

With Moku:Pro, you have access to multiple pieces of advanced optics instrumentation in one device. Deployed standalone or in Multi-instrument Mode, the Lock-in Amplifier, Laser Lock Box, and Phasemeter cover applications such as:

• Gravitational wave detection system development
• Interferometry
• Laser frequency stabilization with PDH locking

• Precision spectroscopy

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Get instant access to new instrument features

We continually update our software with new features, so your Moku device gets better over time. Check out our latest upgrades for Moku:Lab, Moku:Pro, and Moku:Go to enable multi-instrument and customization capabilities across the entire Moku product line, strengthen API support, improve the capabilities of multiple software-defined instruments, and support a broader range of use cases for closed-loop control systems, spectroscopy, microscopy, and more. 

We've got you covered


PDH technique with the Moku:Lab Laser Lock Box

Learn how to replace complicated laser-locking devices with a next-generation Moku:Lab device and use the Pound-Drever-Hall (PDH) technique to lock a laser to a cavity.

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Using Moku:Pro for photonics IC control system research at Intel Labs

Discover how researchers at Intel Labs are using the Moku:Pro Lock-in Amplifier to advance the field of photonics integrated circuits (PICs) while saving time and reducing experimental complexity.


Laser locking with closed-loop transfer function measurement

Explore simultaneous locking and characterization of a narrow line-width laser system using the Moku:Pro Frequency Response Analyzer and Laser Lock Box.

About Liquid Instruments

Liquid Instruments delivers modern, software-defined test and measurement solutions that provide advanced capabilities, a great user experience, and custom programmability for maximum flexibility and performance in a range of applications.

Compare hardware platforms

Explore the Lock-in Amplifier, Laser Lock Box, and Phasemeter options. Compare the instrument specs to choose the right device for your application.



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Suite 150
San Diego, CA 92130

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