Toptica has presented its compact, frequency-domain terahertz spectrometer. The system combines the company's TeraBeam, a highly integrated two-colour diode laser, with newly developed InGaAs/InP emitter and detector technology from the Fraunhofer Heinrich- Hertz Institute. The new cw THz system features a fast scan option, which reduces the acquisition times and acquires a complete THz spectrum in less than a minute. Making use of integrated DFB laser diodes and fibre components, the laser provides 30 mW per two-colour output and is therefore suited to the power requirements of the cw THz emitters and detectors. The emitter uses a high-bandwidth photodiode with an integrated waveguide structure and provides output levels in the microwatt range. The receiver employs an InGaAs photoconductor and achieves good SNR values up to 80 dB. The modules are fully packaged with SM/PM fibre pigtails.
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