At a Glance
Pulsed photoconductive antennas for 1.5 μm optical wavelength, emitted THz power confirmed by PTB (Physikalisch Technische Bundesanstalt)
Technical Background
In terahertz time-domain spectroscopy (TDS), a device under test (DUT) is probed with a short THz pulse. The frequency dependence of loss and refractive index is extracted from the detected pulse via a Fourier transform. Typical applications for pulsed THz radiation are depth-resolved imaging for e.g. 3D quality inspection and spectroscopic measurements up to 6.5 THz. HHI’s high power THz modules allow for faster measurements and therefore facilitate the transfer of THz technology to industrial applications and environments.
Features
- >300 µW THz power
- Photoconductive emitter and receiver
- Mesa-structured InGaAs chips
- Small module footprint
- Plug and play design
Applications
- High-bandwidth terahertz spectroscopy
- Industrial process control
- Non-contact coating film thickness measurement
- High-speed measurements
Specifications
- THz power (typ.): >300 μW
- Spectral range: 0.1 - 6.5 THz
- Dynamic range (peak): >110 dB
- Optical wavelength: 1.5 μm
- Maximum optical power: 50 mW
- Optical pulse duration: 100 fs*
- Emitter bias voltage: 200 V
- Measuring head diameter: 25 mm
* at emitter position
