The latest development in IR-fibre optics enables us to expand the spectral range of process spectroscopy from 2μm out
to 17μm (5000 to 600cm-1) i.e. into the most informative "finger-print" part of the spectrum. Mid-IR wavelength ranges
from 2 to 6-10μm may be covered by Chalcogenide IR-glass CIR-fibres while Polycrystalline PIR-fibres made of Silver
Halides solid solutions transmit 4-17 μm wavelength radiation.
PIR-fibre immersion ATR probes and Transmission/Reflection probes had been manufactured and successfully tested
with different FTIR spectrometers in the field of remote spectroscopy for forensic substances identification, chemical
reaction control, and monitoring of exhaust or exhalation gases. Using these techniques no sample preparation is
necessary for fibre probes to measure evanescent, reflection and transmission spectra, in situ and in real time. QCL
spectrometer may be used as a portable device for multispectral gas analysis at 1ppb level of detectivity for various
applications in environmental pollution monitoring.