P/N 202229

THz detector for power measurements up to 3 W.

Key features

Relative Measurements from 0.1 to 30 THz

Broadband, room temperature operation, easier to use and less expensive than a Golay cell

Flat Spectral Response

Get the best precision accross the entire wavelength range.

Measure Higher Powers

Up to 3 W of continuous power with the THZ12D model, the highest in our THz range of products

Large Aperture

Models range from 9 to 12 mm Ø aperture.

Calibrated at 10.6 µm

THZ-D detectors are calibrated at a single wavelength (10.6 µm) and include wavelength correction data from 10.6 to 440 µm. They are used for relative measurements outside that range.

Compatible stand

Compatible displays & PC interfaces


    Touchscreen display device for power & energy measurement. Single-channel, multiple outputs (USB, Ethernet, Analog).


    PC interface for power & energy measurement. Single-channel, USB output.


    Analog power module, to interface -B heads with oscilloscopes and lock-in amplifiers.

Measurement capabilities

  • Maximum average power

    3 W
  • Noise equivalent power1

    0.5 μW
  • Spectral range2

    10 - 3000 μm
  • Frequency

    0.1 - 30 THz
  • Typical rise time3

    3 sec
  • Typical power sensitivity4

    200 mV/W
  • Power calibration uncertainty5

    ±8.0 %
  • Repeatability

    ±0.5 %
  • Thermal drift

    12 μW/°C
  • Minimum measurable power6

    50 - 100 µW
  • Minimum repetition rate7

    7 Hz
    • 1. Nominal value. Actual value depends on electrical noise in the measurement system.
    • 2. From 10 to 440 μm, spectrometer measurement with multiple laser references validation. From 440 to 600 μm, spectrometer measurement only. From 600 to 3000 μm, relative measurement only. This spectral range is subject to change.
    • 3. With anticipation.
    • 4. Into 100 kΩ load. Maximum output voltage = sensitivity x maximum power.
    • 5. Including linearity with power.
    • 6. Actual value depends on ambient conditions and the measurement system.
    • 7. Minimum repetition rate for stable average power measurements.

Damage thresholds

  • Maximum average power density1

    30 W/cm²
  • Maximum energy density

    1 J/cm²
    • 1. At 1064 nm, 1 W CW.

Physical characteristics

  • Aperture diameter

    12 mm
  • Absorber

  • Dimensions

    73H x 73W x 28D mm (80D mm with tube)
  • Weight

    0.32 kg

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