|Download Pulsed Terahertz Spectrometer Datasheet (PDF, 643 KB)|
Tydex Pulsed Terahertz Spectrometer (PTS-1) is an integrated solution for broadband THz time-domain spectroscopy. It is ideal for scientific research applications due to its radiation propagating through free space.
Similar to other broadband THz time-domain spectroscopy systems, the pumping source for THz radiation generator is a femtosecond laser (1049 nm wavelength, ~100 fs pulse duration, 70 MHz pulse repetition rate). PTS-1 utilizes optical rectification of femtosecond pulses to generate THz radiation. The femtosecond laser radiation is transmitted to THz radiation generator which is a crystal of magnesium-oxide-doped lithium niobate (MgO:LiNbO3) plate with a HRFZ Si prism. The generated pulses propagate through free space and are detected by electro-optical means with an Electro-Optical Detector (EOD) manufactured by Tydex.
Fig. 1. Principal diagram of PTS-1.
THz radiation generation and detection is effected as follows: laser radiation is delivered by a system of mirrors to the beamsplitter, where it is divided into a pumping beam and a signal beam.
The pumping beam is focused into the generating structure. THz radiation output from the generating structure is directed to the cell containing the sample under study. After passing through the cell, the THz radiation is focused into electro-optical crystal of EOD.
The signal beam passes through an optical delay line, then is focused into the same EOD crystal by the system of mirrors. The EOD signal (the TDS systems directly measure the electric field of THz pulse) is received by the software that also controls the delay line. The software includes a mathematical apparatus that transforms the EOD signal into a frequency spectrum.
Key features of the PTS-1:
Applications of the PTS-1:
PTS-1 package includes:
All optomechanical components, both for optical and THz path;
Operating modes of the PTS-1:
|Spectral range||0.1-1.2 THz (0.1-2.5 THz optional)|
|Dynamic range||≥ 40 dB|
|Average output power (THz radiation)||≥ 100 μW|
|Delay time||≥ 450 ps|
|Spectral resolution||≤ 40 GHz|
|Type of THz radiation source||MgO:LiNbO3|
|Center pumping wavelength||1049 nm|
|Pumping laser pulse duration||90 fs|
|Detector type||Near IR EOD|
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