BOREAL LASER GasFinder2, Operation Manual

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Boreal Laser Inc. GasFinder2 Operation Manual — Tutorial July 17th 2017
Glossary of Common Terms and Abbreviations.
absorption lines Dark lines in the spectrum due to absorption of the light.
absorption wavelength The wavelength at which a gas absorbs light.
angle of incidence(i) The angle to the perpendicular that a beam makes.
angle of refl ection(r) The angle to the perpendicular that a refl ected beam makes.
angstrom Measurement of wavelength 0.000 000 000 1 part of a meter.
arrays A group of graphs or curves.
corner cube Special type of refl ector surface (see retrorefl ector).
coherent Having the same frequency and phase.
digitised Represented by numbers.
facets Sides or faces.
frequency Number of repeated oscillations a wave makes in a set time.
inert Not reactive.
infra- red Long wavelength electromagnetic radiation.
laser L ight A mplifi cation by S timulated E mission of R adiation.
microcontroller A small device using a microcomputer.
microcomputer A small computer the size of a postage stamp.
micron 0.000 001 part of a meter.
modulated Like a wave.
molecule A collection of atoms bonded together.
multimode A light beam containing many different frequencies.
nanometer 0.000 000 001 part of a meter.
NIST N ational I nstitute of S tandards and T echnology.
OTDR O ptical T ime D omain R efl ectometer.
orders of magnitude Multiples of ten.
permeation tube A device to generate a gas at a known and controlled rate.
photo-diode An electronic device used to detect light.
ppm parts per million.
ppmm parts per miliion metre.
ppb parts per billion.
retrorefl ector A device to refl ect a beam back to where it came from.
retro arrays A group of retro refl ectors.
saw-tooth Serrated, or shaped like the teeth on a saw.
singlemode A light beam containing only one frequency.
spectroscopy Measurement of different radiation spectra.
TDLS T uneable D iode L aser S pectroscopy.
tuneable diode A diode (emitter) that can have its wavelength altered.
wavelength Distance between the same points in two consecutive waves.