THz Spectroscopy

An emerging application space is the generation of THz emission and THz spectroscopy.  IPS has been a pioneer in the generation of semiconductor laser-based THz emission sources for nearly 20 years [1-3]. Generation of THz radiation is accomplished by combining two single frequency laser sources at slightly different wavelengths inside an optical fiber. 

The combined beam is used to illuminate a photo-mixer that generates THz radiation with a wavelength proportional to the frequency difference of the two laser diodes.  Using this method, the THz frequency can be swept by precisely changing the temperature of the laser diode sources; see for example US Patents 9,134,054 and 9,806,491.

The frequency sweeping enables numerous absorption spectroscopy applications.  Over the frequency range of interest, mode-hop free laser sources with optical isolators are required to enable stable operation. 

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IPS lasers offers compact single frequency laser sources that are ideal for these applications.

Related Products

We offer a wide variety of THz spectroscopy lasers, including: