Laser 2000

Lock-in Amplifier

Lock-In-Amplifier

Available on Moku:Go, Moku:Lab, and Moku:Pro hardware

Liquid Instruments

Lock-in Amplifier

A Lock-in Amplifier is typically designed to isolate and extract a signal of known frequency from a noisy environment. It enables you to measure signals obscured by noise with more than 100 dB of dynamic reserve on Moku:Go and more than 120 dB of dynamic reserve on Moku:Lab and Moku:Pro.

Below is the Lock-in Amplifier’s user interface showcasing some of the key features explained below:

 

Key Features of the Lock-in Amplifier:

Visualise and Configure with the Intuitive Block Diagram

The block diagram, shown above, provides a clear interactive overview of the Lock-in Amplifier’s setup allowing you to easily configure, monitor, and adjust every stage in the signal processing chain. The intuitive and interactive user interface allows you to:

  • Configure the setup
  • Monitor the signal throughout the signal process
  • Adjust components using interactive icons

 

Built-in Probe Points

The integrated Oscilloscope and Data Logger are accessible via probe points. You can place the probe points on the block diagram to monitor signals and log data at various points in the Lock-in Amplifier’s setup. In the video above, probe points A, B, C and D are used, and their signals are clearly displayed on the Oscilloscope below the block diagram.

Integrated instruments accessible via probe points:

  • Oscilloscope
  • Data Logger

 

Demodulation Modes

Multiple demodulation modes are available, including Dual Phase Demodulation. Select from a wide range internal and external (with or without phase-locked loop) demodulation modes, with the option to bypass the mixer stage.

Toggle between rectangular (X/Y mode) or polar coordinates (R/Theta mode) by a click of a button on the block diagram.

 

Low Noise

Industry-leading noise performance across the entire spectrum.

 

Applications:

  • Laser scanning microscopy (SRS, TA)
  • Magnet sensing (magneto-optical Kerr effect)
  • Laser frequency stabilising
  • Pump probe / ultrafast spectroscopy

The Lock-in Amplifier runs on Moku:Go, Moku:Lab and Moku:Pro. You can compare the platform specifications below:

Moku:Go’s
Lock-in Amplifier
Moku:Lab’s
Lock-in Amplifier
Moku:Pro’s
Lock-in Amplifier
Demodulation frequency
1 mHz to 20 MHz 1 mHz to 200 MHz 1 mHz to 600 MHz
Input noise
3 µV/√Hz at 100 kHz 30 nV/√Hz at 100 kHz 30 nV/√Hz at 100 Hz
Input impedance
1 MΩ 50 Ω / 1 MΩ 50 Ω / 1 MΩ
Output Gain Range
-80 to +80 dB -80 to +160 dB -80 to +160 dB
Local Oscillator Output
Up to 20 MHz with variable amplitude Up to 200 MHz with variable amplitude Up to 500 MHz with variable amplitude
Reference mode
Internal, external, external PLL, and none Internal, external, external PLL, and none Internal, external, external PLL, and none
Time constant
From 128 ns to 1.59 s From 32 ns to 0.537 s From 12.8 ns to 0.215 s
Dynamic reserve
> 100 dB > 120 dB > 120 dB
Data logging
1 MSa/s 1 MSa/s 10 MSa/s
Filter Slopes
6, 12, 18, or 32 dB/Oct 6, 12, 18, or 32 dB/Oct 6, 12, 18, or 32 dB/Oct
Dual-phase demodulation
X/Y or R/θ X/Y or R/θ X/Y or R/θ
Phase shift precision
0.001° 0.001° 0.001°
Deployable in Multi-instrument Mode?
No N/A Yes
Software & APIs
macOS App
Windows App
API support for Python, MATLAB, and LabVIEW
iPadOS App
Windows App
API support for Python, MATLAB, and LabVIEW
iOS App
API support for Python and MATLAB
Lock-in Amplifier Datasheet - Moku:Go
Lock-in Amplifier Datasheet - Moku:Lab
Lock-in Amplifier Datasheet - Moku:Pro
Lock-in Amplifier User Manual - Moku:Go
Lock-in Amplifier User Manual - Moku:Lab
Lock-in Amplifier User Manual - Moku:Pro
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Lock-In-Amplifier

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