Moku:Pro’s Lock-in Amplifier

Compare all lock-in amplifiers

Overview

Moku:Pro’s digital Lock-in Amplifier supports dual-phase demodulation (XY/Rθ) from DC to 600 MHz with more than 120 dB dynamic reserve. Blended ADC technology ensures consistent low noise (as low as 30 nV/√Hz at 100 Hz) across the entire spectrum, from acoustic to RF. An integrated PID controller can be placed after the demodulation stage for phase-locked loop applications. It also features an integrated 4-channel oscilloscope and data logger, enabling you to observe internal signals at up to 1.25 GSa/s and log data at up to 10 MSa/s.

Specs

Demodulation frequency
Demodulate with frequencies ranging from 1 mHz to 600 MHz with 3.55 μHz resolution

Dynamic reserve
>120 dB

Adjustable time constant
From 12.8 ns

Input noise performance
30 nV/√Hz at 100 Hz

Filter slopes
6, 12, 18, or 32 dB/Oct

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

Dual-phase demodulation
X/Y or R/θ

Phase shift precision
0.001°

Input impedance
50 Ω / 1 MΩ

Output gain range
-80 to +160 dB

Local oscillator output
Up to 500 MHz with variable amplitude

Key features

Extract signals with high precision
Measure signals obscured by noise with more than 120 dB dynamic reserve

Custom configuration and data acquisition
Built-in probe points for signal monitoring and data logging

Choose your output coordinate
Toggle between rectangular (X/Y mode) or polar coordinates (R/θ mode)

Onboard PID controller
Real-time control with proportional, integral, and derivative gain profiles

Select from different demodulation modes
Internal, external (direct local oscillator input or phase-locked loop), with the option to bypass the mixer stage

Applications

Pump probe / ultrafast spectroscopy

Laser scanning microscopy (SRS, TA, etc.)

Magnetic sensing (magneto-optical Kerr effect)

Laser frequency stabilization

Documentation

Specs
Moku:Pro Spec Sheet

Datasheet
Moku:Pro Datasheet
Moku:Pro’s Lock-in Amplifier Datasheet

User Manual
Moku:Pro’s Lock-in Amplifier User Manual

Connect from your tablet

Control your Moku hardware through an intuitive iPad interface.

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 and MATLAB allows straightforward automation of Moku:Pro in complex setups or for repetitive tasks.

Try the software

Dual-phase demodulation

Moku:Pro’s Lock-In Amplifier features a dual-phase demodulator with cascaded single pole low-pass filters to attenuate the second harmonic and suppress noise in each quadrature.

  • Select between 6, 12, 18, and 24 dB / octave lowpass filter slopes
  • Select between rectangular (X/Y) and polar (R/θ) coordinate modes
  • View the demodulated in-phase and quadrature signals prior to the low-pass filters using the integrated Oscilloscope

Internal and external references

Demodulate your input signal with an internal or external reference. In internal mode, the orthogonal reference signals are generated internally using a direct digital synthesizer (DDS). In external mode, you can select between either direct or phase-locked options. In direct external mode, the input signal is demodulated using the reference input signal for single-phase demodulation (X). The phase-locked loop option reconstructs two orthogonal references that are phase-locked to the reference input signal to support external dual-phase demodulation (XY/Rθ). Additionally, the mixer stage can be bypassed for additional closed-loop control applications.

Integrated PID controller, oscilloscope, data logger

Monitor up to four signals at a time using the Lock-In Amplifier’s integrated 4 channel, 1.25 GSa/s oscilloscope, and continuously log data at up to 10 MSa/s using its built-in data logger. Additionally, the PID controller provides real-time control over proportional, integral, and derivative gain profiles with configurable saturation.

Available on Moku:Pro hardware

Our most powerful hardware platform to date, Moku:Pro harnesses the power of a Xilinx Ultrascale+ FPGA with higher bandwidth, lower noise, more channels, and more output power than ever before.

Moku:Pro features a suite of nine instruments

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