What is Laser Induced Fluorescence Spectroscopy?
Laser Induced Fluorescence (LIF) is an optical spectroscopic technique where a sample is excited with a laser, and the fluorescence emitted by the sample is subsequently captured by a photodetector.
What is LIF technology?
Laser-induced fluorescence (LIF) is a technique that uses laser light to excite fluorescent molecules that exist in the vast majority of hazardous non-aqueous phase liquids (NAPLs) such as petroleum fuels/oils, coal tars, and creosotes.
Why is a laser used as the excitation source in fluorescence?
The high photon flux and spatial coherence (focusing capability) of laser light provide excellent properties for a fluorescence excitation source. Since laser lines are monochromatic, background elevations from Rayleigh and Raman scattering are easily avoided by selection of the appropriate emission wavelengths.
What is meant by laser excitation?
The excitation mechanism is the source of energy that raises the atoms in the active medium into their excited state, thus creating population inversion. In accordance to the law of conservation of energy, the electromagnetic radiation out of the laser is always less then the input energy by the excitation mechanism.
How does laser ablation work?
Laser ablation or photoablation is the process of removing material from a solid (or occasionally liquid) surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser energy and evaporates or sublimates. At high laser flux, the material is typically converted to a plasma.
What is an excitation source?
The excitation source of the engine intake air noise is the pressure fluctuation produced by the reciprocating piston motion and the valve timing. The noise due to the mechanical vibration of the intake pipes can also be associated as a part of the intake noise, or called secondary airborne noise.
What is laser explain?
laser, a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light, typically producing a very narrow beam of radiation. Laser is an acronym for “light amplification by the stimulated emission of radiation.”
What is laser mean?
Light amplification by stimulated emission of radiation
Laser/Full name
What is laser ablation?
Laser ablation (LA) is a process in which a laser beam is focused on a sample surface to remove material from the irradiated zone.
What is fluorescence excitation spectrum?
A fluorescence excitation spectrum is when the emission wavelength is fixed and the excitation monochromator wavelength is scanned. In this way, the spectrum gives information about the wavelengths at which a sample will absorb so as to emit at the single emission wavelength chosen for observation.
What is tryptophan fluorescence?
Tryptophan is an important intrinsic fluorescent (amino acid), which can be used to estimate the nature of microenvironment of the tryptophan. With fluorescence excitation at 295 nm, the tryptophan emission spectrum is dominant over the weaker tyrosine and phenylalanine fluorescence.
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