Photoconductive Switches
Compact modules for pulsed terahertz generation
- Fiber-Coupled InGaAs Antennas
- SM/PM fiber pigtail and Silicon lens included
- High bandwidth > 6 THz, typ. 70 µW power
- Core components of TeraFlash pro and TeraFlash smart
Pulsed terahertz generation with leading-edge technology: InGaAs antennas provide up to 400 µW power and a bandwidth of 6 THz. The emitter and detector modules, developed by Fraunhofer Heinrich-Hertz Institute (Berlin/Germany), are packaged with a Silicon lens and SM/PM fiber and can be flexibly positioned in transmission or reflection experiments.
Specifications
| Photoconductive Switches | |
| Terahertz emitter | InGaAs/InP photoconductive switch with strip-line antenna |
| Terahertz receiver | InGaAs/InP photoconductive switch with dipole antenna |
| Emitter / receiver bandwidth | 6 THz |
| Semiconductor material | Multi-layer structure of InGaAs and InAIAs on InP |
| Wavelength | 1.5 µm |
| Average terahertz power | Typ. 70 µW @ 20 mW laser power |
| Package | Cylindrical, integrated Si lens and SM/PM fiber pigtail Emitter / receiver modules: Ø 25 mm, 34 mm length |
| Recommended operating conditions | Laser power 20 mW average Max. bias +100 V (unipolar, emitter), ± 3 V (receiver, only for testing) |
Additional Information
Literature
Papers
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Fastest thickness measurements with a terahertz time-domain system based on electronically controlled optical sampling
M. Yahyapour et al. in Appl. Sciences (2019)
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Laser-based terahertz generation & applications
Lang, M. et al. in Photonik International (2012)
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Industrial applications of terahertz sensing: State of play
Naftaly, M. et al. in Sensors (2019)
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Terahertz-time domain spectrometer with 90 dB peak dynamic range
Vieweg et al. in Journal of Infrared, Millimeter, and Terahertz Waves (2014)
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High resolution lensless terahertz imaging and ranging
Damyanov, D., et al. in IEEE Access (2019)
