Terahertz time-domain spectroscopy (TDS) uses low energy THz pulses in the spectral region of 0.1-10 THz to characterize and probe vibrations of atoms and molecules within materials in both amplitude and phase. Many materials are transparent at THz range, which is biologically safe, making THz-TDS a high-potential technique for many societal applications such as fundamental science, security, and medicine.
Laser Solutions for THz-TDS
As mentioned in Secondary Sources – Terahertz Generation section, depending on the pulse energy and spectral range used, different lasers and conversion processes can be used. Amplitude proposes a broad range of solutions :
- For broadband Terahertz generation with two-color filamentation, ultrashort TiSa lasers have been widely used, and now post-compressed Ytterbium lasers bring increasing interest.
- For optical rectification in organic crystals, Ytterbium lasers are usually preferred.
- For organic crystals MIR OPCPA sources are the best option.
