blank.png

Laser Lock Box

One of twelve instruments included with every Moku:Lab

MokuLab-SilverFront.png
blank.png

Laser Lock Box

One of twelve instruments
included with every Moku:Lab

MokuLab-SilverFront.png

Laser Lock Box overview

Features


  • Block diagram view of the signal processing chain
  • Demodulate signals with internal or external local oscillators
  • Scan resonances with sawtooth or triangle waveforms
  • Observe signals at different locations in the signal processing chain using an integrated oscilloscope
  • Quickly lock to any zero-crossing in the error signal using the ‘Tap-to-Lock’ feature
  • Low-pass filter demodulated signals with up to fourth order infinite-impulse response filters
  • Individually configure high- and low-bandwidth PID controllers for fast and slow feedback
  • Observe signals with respect to the scanning voltage using the ‘Scope-Scan Lock’ feature

Specifications


  • Local oscillator frequency: 1 mHz to 200 MHz (3.55 µHz resolution)
  • Scan waveforms: positive sawtooth, negative sawtooth, triangle
  • Scan frequency: 1 mHz to 1 MHz
  • Low-pass filter corner frequency: 1 kHz to 14 MHz
  • 6 dB / 12 dB per octave filter roll-off
  • Low-pass filter types: Butterworth, Chebyshev, Inverse Chebyshev, Elliptic, Gaussian, Bessel, Legendre
  • AC / DC coupling
  • 50 Ω / 1 MΩ input impedance

Laser Lock Box overview

Features


  • Block diagram view of the signal processing chain
  • Demodulate signals with internal or external local oscillators
  • Scan resonances with sawtooth or triangle waveforms
  • Observe signals at different locations in the signal processing chain using an integrated oscilloscope
  • Quickly lock to any zero-crossing in the error signal using the ‘Tap-to-Lock’ feature
  • Low-pass filter demodulated signals with up to fourth order infinite-impulse response filters
  • Individually configure high- and low-bandwidth PID controllers for fast and slow feedback
  • Observe signals with respect to the scanning voltage using the ‘Scope-Scan Lock’ feature

Specifications


  • Local oscillator frequency: 1 mHz to 200 MHz (3.55 µHz resolution)
  • Scan waveforms: positive sawtooth, negative sawtooth, triangle
  • Scan frequency: 1 mHz to 1 MHz
  • Low-pass filter corner frequency: 1 kHz to 14 MHz
  • 6 dB / 12 dB per octave filter roll-off
  • Low-pass filter types: Butterworth, Chebyshev, Inverse Chebyshev, Elliptic, Gaussian, Bessel, Legendre
  • AC / DC coupling
  • 50 Ω / 1 MΩ input impedance
LaserLockBox-TabletView.jpg

Badge-AppStore.png Badge-Python.png Badge-MATLAB.png Badge-LabVIEW.png

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

LaserLockBox-TabletView.jpg

Badge-AppStore.png Badge-Python.png
Badge-MATLAB.png Badge-LabVIEW.png

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

The single-instrument solution for
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 birds-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.

Tap-to-lock

Quickly lock to any zero-crossing in the error signal using the ‘Tap-to-Lock’ feature.

Custom controls

Screenshot-CustomControls.jpg

Quickly access the controls you need with customisable control palette view. Split screen access to the integrated oscilloscope lets you adjust parameters and observe your system’s response in real-time.

High performance

Direct digital down-conversion of frequencies up to 200 MHz sidesteps 1/f noise introduced by analog electronics. Precisely control demodulation phase with 1 millidegree accuracy. Ensure a clean error signal with Moku:Lab’s low noise input (< 30 nV/√Hz) and user-configurable low-pass filters.

Dual PID controllers

Individually configure high- and low-bandwidth PID controllers for fast and slow feedback. Tune the response in real-time from an intuitive interface.

Export data effortlessly

Icon-Dropbox.png Icon-SDCard.png Icon-Cloud.png Icon-Email.png

Export your data to Dropbox, SD Card, iCloud or e-mail. Moku:Lab can save an image of your screen or export your data in CSV or .MAT formats.

LabVIEW, Python, and MATLAB

Integrate Moku:Lab’s Laser Lock Box and its other instruments into your existing system using LabVIEW, Python, and MATLAB APIs.

The single-instrument solution for 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 birds-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.

Tap-to-lock

Quickly lock to any zero-crossing in the error signal using the ‘Tap-to-Lock’ feature.

Custom controls

Screenshot-CustomControls.jpg

Quickly access the controls you need with customisable control palette view. Split screen access to the integrated oscilloscope lets you adjust parameters and observe your system’s response in real-time.

High performance

Direct digital down-conversion of frequencies up to 200 MHz sidesteps 1/f noise introduced by analog electronics. Precisely control demodulation phase with 1 millidegree accuracy. Ensure a clean error signal with Moku:Lab’s low noise input (< 30 nV/√Hz) and user-configurable low-pass filters.

Dual PID controllers

Individually configure high- and low-bandwidth PID controllers for fast and slow feedback. Tune the response in real-time from an intuitive interface.

Export data effortlessly

Icon-Dropbox.png Icon-SDCard.png Icon-Cloud.png Icon-Email.png

Export your data to Dropbox, SD Card, iCloud or e-mail. Moku:Lab can save an image of your screen or export your data in CSV or .MAT formats.

LabVIEW, Python, and MATLAB

Integrate Moku:Lab’s Laser Lock Box and its other instruments into your existing system using LabVIEW, Python, and MATLAB APIs.

F.A.Q.


  • If Moku:Lab only has two output channels, how is it possible to generate feedback control signals as well as the modulation tone and scanning waveform?

    The low-bandwidth control signal on output Channel 2 can be separated electronically from the high-frequency modulation tone using an external bias-tee (not included with Moku:Lab). An appropriate bias-tee can be purchased from Mini-Circuits.

    The scanning waveform is typically applied to the same actuator as the high-bandwidth control signal, so no bias-tee is required to separate the two signals.


  • Can I adjust the corner frequency of the low-pass filter?

    Yes! The low-pass filter corner frequency can be tuned from 1 kHz to 14 MHz. You can also select different filter types including Chebyshev II and Elliptic filters that can be used to notch troublesome resonances.


  • What laser locking techniques does the Laser Lock Box support?

    The Laser Lock Box supports a number of different locking techniques including Pound-Drever Hall (PDH) locking, Heterodyne offset phase locking, RF locking and Dither locking.


  • Does it lock frequency or phase?

    The Laser Lock Box can be used to phase-lock lasers (e.g., offset phase locking) or to lock to a reference cavity (Pound-Drever Hall locking).


  • Can I demodulate with an external reference?

    Yes! The Laser Lock Box supports direct demodulation with an external source and demodulation with a phase-locked loop (PLL) locked to an external source.


  • Does it lock continuous wave and pulsed lasers?

    Moku:Lab's Laser Lock Box can be used to stabilize the frequency of continuous wave lasers.


  • What if my actuator can't take negative voltages?

    The Laser Lock Box has output voltage limiters designed for exactly this purpose. You can set arbitrary high and low limits on each output and the control signals will be clamped to these levels, preventing damage to sensitive actuators. Note that the modulation signal from the auxiliary oscillator is not clamped to avoid clipping and distortion.


  • When and how should I use the slow PID controller?

    When stabilizing lasers, there are often multiple actuators to feed back to. A common situation is to have one fast actuator with limited range (e.g. current or piezo) and one slow actuator with a much larger range (e.g. temperature). The slow PID controller acts on the fast PID controller's output, keeping it centered around zero and thus maximizing the dynamic range for fast feedback.


F.A.Q.


  • If Moku:Lab only has two output channels, how is it possible to generate feedback control signals as well as the modulation tone and scanning waveform?

    The low-bandwidth control signal on output Channel 2 can be separated electronically from the high-frequency modulation tone using an external bias-tee (not included with Moku:Lab). An appropriate bias-tee can be purchased from Mini-Circuits.

    The scanning waveform is typically applied to the same actuator as the high-bandwidth control signal, so no bias-tee is required to separate the two signals.


  • Can I adjust the corner frequency of the low-pass filter?

    Yes! The low-pass filter corner frequency can be tuned from 1 kHz to 14 MHz. You can also select different filter types including Chebyshev II and Elliptic filters that can be used to notch troublesome resonances.


  • What laser locking techniques does the Laser Lock Box support?

    The Laser Lock Box supports a number of different locking techniques including Pound-Drever Hall (PDH) locking, Heterodyne offset phase locking, RF locking and Dither locking.


  • Does it lock frequency or phase?

    The Laser Lock Box can be used to phase-lock lasers (e.g., offset phase locking) or to lock to a reference cavity (Pound-Drever Hall locking).


  • Can I demodulate with an external reference?

    Yes! The Laser Lock Box supports direct demodulation with an external source and demodulation with a phase-locked loop (PLL) locked to an external source.


  • Does it lock continuous wave and pulsed lasers?

    Moku:Lab's Laser Lock Box can be used to stabilize the frequency of continuous wave lasers.


  • What if my actuator can't take negative voltages?

    The Laser Lock Box has output voltage limiters designed for exactly this purpose. You can set arbitrary high and low limits on each output and the control signals will be clamped to these levels, preventing damage to sensitive actuators. Note that the modulation signal from the auxiliary oscillator is not clamped to avoid clipping and distortion.


  • When and how should I use the slow PID controller?

    When stabilizing lasers, there are often multiple actuators to feed back to. A common situation is to have one fast actuator with limited range (e.g. current or piezo) and one slow actuator with a much larger range (e.g. temperature). The slow PID controller acts on the fast PID controller's output, keeping it centered around zero and thus maximizing the dynamic range for fast feedback.


Want your own?

Contact Us
Buy Now

Want your own?

Contact Us
Buy Now