High-Speed THz Time-Domain Spectrometer

MENLO TERA ASOPS Laser THz path purgebox 3w


Advanced Features and Benefits

  • NEW: Spectral Range >4.5 THz
  • NEW: Dynamic Range >70 dB
  • No Mechanical Delay Line
  • Large Scanning Range
  • High Spectral Resolution
  • Turnkey System, User-Friendly Controller Software
  • Remote Control via Network
THz specifications
Spectral Range >4.5 THz
Dynamic Range >70 dB
Total Scan Range up to 10 ns (pulse-to-pulse distance)
Rapid Sampling Rate >600 Hz
Laser specifications  
Laser Output Ports for THz Two fiber coupled ports, 1560 nm, FC/APC, PM fiber, <90 fs after 2.5 m patch cord
System Repetition Rate 100 MHz
Dimensions / weight  
Optomechanical Setup 900 x 600 x 200 mm3, 34 kg
THz Control Electronics mounted in a 19” rack cabinet,800 x 600 x 1800 mm3, 75 kg





With the ASOPS technique ultrafast data sampling is no longer limited by the natural restrictions of a mechanically moving optical delay unit. The novel TERA ASOPS highspeed THz time-domain spectrometer system is using this technique to temporally scan THz pulse traces at a revolutionary high rate. At the same time it is extending the detection window to nanoseconds pushing the spectral resolution into the region of hundreds of MHz.

TERA ASOPS is using two ultrafast lasers operating at a locked repetition rate with a tunable difference, providing the optical pulses for THz emission and detection. The lasers are featuring Menlo Systems’ patented figure 9® mode locking technology for highest stability and reliability. The laser pulses are delivered via optical fiber to the THz antenna modules which are of the latest standard for high-power THz wave emission. High-transmission low-loss polymer optics ensure easy alignment and long-term stability of the THz path.

For seamless integration into existing experiments, the software features remote control of the spectrometer and high-speed data transfer over network. On request, additional laser output ports at 1560 nm and 780 nm can be configured.


  • THz Purge Box Extension Unit

    Product Code: THz Purge Box

    Menlo Purge box option 3w 

    Compact purge box for our THz mirror systems for improved, water line free Terahertz spectroscopy.

    Download PDF: Infosheet THz Purgebox

  • MULTIBRANCH Additional Seed Ports

    Product Code: MULTIBRANCH

    Seeding of multiple amplifiers with optional subsequent frequency conversion to cover multiple wavelengths

  • TERA Image Extension Unit

    Product Code: TERA Image


    For THz imaging applications our fully automated extension TERA Image can be integrated.


  • Plug-in Terahertz Reflection Head Add-on for flexible THz measurement geometry

    Product Code: Reflection Head

    MENLO THz Reflection Head

    Plug-in THz reflection head with integrated parabolic mirror THz optics. Compatible with Menlo Systems' fiber-coupled THz antennas TERA15-TX-FC (Emitter) and TERA15-RX-FC (Receiver).

    Download PDF: Infosheet THz Reflection Head

  • Reflection Guide Add-on for flexible THz measurement geometry

    Product Code: Reflection Guide


    THz path pivot platform for quick and flexible manual adjustment of the reflection angle, ranging from a minimal reflection angle of 38° to normal up to a stretched configuration for measurements in transmission geometry. A scale for measurement angle indication is included. The platform assures angle adjustment of the sample holder.

  • ImageLab: Extended Edition THz Image Analysis

    Product Code: ImageLab


    Hyperspectral Image Processing Software for THz Imaging Data


THz pulse measured in low humidity atmosphere*

 MENLO SYSTEMS Terahertz Time Domain Solution time ASOPS apo


Calculated THz spectrum:

 MENLO SYSTEMS Terahertz Time Domain Solution FFT ASOPS apo

*Settings: Averaging time: 500 s, Scanning rate: 100 Hz

Menlo Expert Milan Oeri 2022
Dr. Milan Öri
Your direct line to our expert

Data sheets

Product literature

Ordering information

  • Product Code

+49 89 189166 0

Menlo Systems, Inc.
+1 973 300 4490

Feedback? Click here