En óptica, un interferómetro de Fabry-Pérot, o Etalon está, normalmente, constituido por una placa con dos superficies reflectantes, o dos espejos paralelos. volo per applicazioni in campo astronomico da satellite. Viene presentato l’ interferometro di. Fabry-Pérot all’interno del quadro degli spettroscopi per uso. Media in category “Fabry-Pérot interferometer”. The following 37 files are in this category, out of 37 total. Airy distribution of a Fabry-Perot.
|Published (Last):||10 February 2009|
|PDF File Size:||8.2 Mb|
|ePub File Size:||4.95 Mb|
|Price:||Free* [*Free Regsitration Required]|
It is named after Charles Fabry and Alfred Perotwho developed the instrument in The flats in an interferometer are often made in a wedge shape to prevent the rear surfaces from producing interference fringes; the rear surfaces often also have an anti-reflective coating.
Resonances occur at frequencies at which light exhibits constructive interference after one round trip. If both surfaces have a reflectance Rthe transmittance function of the etalon is given by.
It is displayed as the blue line in the figure “The physical fahry of the Lorentzian finesse”.
Retrieved from ” https: In the accompanying illustration, interferometrl one ray emitted from point A on the source is traced. Archived from the original pdf on To within a constant multiplicative phase factor, the amplitude of the m th transmitted beam can be written as:. Etalons with high finesse show sharper transmission peaks ve lower minimum transmission coefficients.
At the point where. This approximation is then typically also used to calculate the Airy finesse. This page was last edited on 2 Novemberat Photoniques in French If the transmitted beams are out-of-phase, destructive interference occurs and this corresponds to a transmission minimum.
The stored, transmitted, and reflected light is spectrally modified compared to the incident light.
This article needs additional citations for verification. Optical Physics 3rd ed. The underlying Lorentzian lines can be resolved as long as the Taylor criterion is obeyed see figure “The physical meaning of the Lorentzian finesse”. Breathalyzer Carbon dioxide sensor Carbon monoxide detector Catalytic bead sensor Chemical field-effect transistor Electrochemical gas sensor Electrolyte—insulator—semiconductor sensor Electronic nose Fluorescent chloride sensors Holographic sensor Hydrocarbon dew point analyzer Hydrogen sensor Hydrogen sulfide sensor Infrared point sensor Ion selective electrode Microwave chemistry sensor Nitrogen interferomerro sensor Nondispersive infrared sensor Olfactometer Optode Oxygen sensor Pellistor pH glass electrode Potentiometric sensor Pefot electrode Smoke detector Zinc oxide nanorod sensor.
May Learn how and when to remove this template message. The series is a geometric series whose sum can interfferometro expressed analytically.
Since the incident beam was assumed to have an intensity of one, this will also give the transmission function:. Imterferometro Wikipedia, the free encyclopedia. The amplitude can be rewritten as. Due to the angle dependence of the transmission, the peaks can also be shifted by rotating the etalon with respect to the beam. Also in this case each Airy distribution is the sum of all underlying mode profiles which can be strongly distorted. Etalons are widely used in telecommunicationslasers and spectroscopy to control and measure the wavelengths of light.
The generic Airy distribution, which considers solely the physical processes exhibited by light inside the resonator, then derives as the intensity circulating in the resonator relative to the intensity launched, . CS1 French-language sources fr Articles needing additional references from May All articles needing additional references Articles needing additional references from October Therefore, the Airy distribution becomes the underlying fundamental function and the measurement delivers a sum of Airy distributions.
Diode Lasers and Photonic Integrated Circuits 2nd ed. For an asymmetrical cavity, that is, one with two different mirrors, the general form of the transmission function is. The incident amplitude at point a is taken to be one, and phasors are used to represent the amplitude of the radiation. In the derivation below, n is the index of refraction inside the etalon, and n 0 is that outside the etalon.
Svelto, “Principles of Lasers”, 5th ed. Constructive interference occurs if the two beams are in phaseleading to resonant enhancement of light inside the resonator.
Interferômetro de Fabry-Pérot
The measurable case interferomerto the intensity resulting from the interference of both backward-propagating electric fields results in the Airy distribution .
Views Read Edit View history. The maximum reflectivity is given by:.
In contrast to the exact solution above, it leads to. This definition of the Airy finesse is consistent with the Taylor criterion of the resolution of a spectrometer. If the two beams are out of phase, only a interferomwtro portion of the launched light is stored inside the resonator.
Interferómetro Fabry-Pérot – Wikipedia, a enciclopedia libre
However, this approach is physically misleading, because it assumes that interference takes place between the outcoupled beams after mirror 2, outside the resonator, rather than the launched and circulating beams after mirror 1, inside the resonator. The intensity of the beam will be interferkmetro t times its complex conjugate. The limiting case occurs at.
Please help improve this section by adding citations to reliable sources. The field transmitted after the first propagation and the smaller and smaller fields transmitted after each consecutive propagation through the resonator are. As the ray passes through the paired flats, it is multiply reflected to produce multiple transmitted rays which are collected by the focusing lens and brought to point A’ on the screen. Active pixel sensor Angle—sensitive pixel Back-illuminated sensor Charge-coupled device Contact image sensor Electro-optical sensor Flame detector Infrared Kinetic inductance detector LED as light sensor Light-addressable potentiometric sensor Nichols radiometer Optical fiber Photodetector Photodiode Photoelectric sensor Photoionization detector Photomultiplier Photoresistor Photoswitch Phototransistor Phototube Position sensitive device Scintillometer Shack—Hartmann wavefront sensor Single-photon avalanche diode Superconducting nanowire single-photon df Transition edge sensor Tristimulus colorimeter Visible-light photon counter Df sensor.
In the oblique incidence case, the finesse will depend on the polarization state of the beam, since the value of “R”, given by the Fresnel equationsis interferomtero different for p and s polarizations.