What is the principle of Fabry-Perot interferometer explain its working?
The Fabry-Perot interferometer uses the phenomenon of multiple beam interference that arises when light shines through a cavity bounded by two reflective parallel surfaces. Each time the light encounters one of the surfaces, a portion of it is transmitted out, and the remaining part is reflected back.
What is the use of Fabry-Perot interferometer?
A Fabry–Pérot etalon can be used to make a spectrometer capable of observing the Zeeman effect, where the spectral lines are far too close together to distinguish with a normal spectrometer. In astronomy an etalon is used to select a single atomic transition for imaging. The most common is the H-alpha line of the sun.
How many plates we can use in Fabry etalon experiment?
An etalon is an optical interferometer that consists of two glass plates, separated by a small,flxed distance.
How does a Fabry-Perot filter work?
A Fabry-Perot optical filter consists of two flat highly-reflective and parallel mirrors spaced a well-defined distance apart, with the reflecting part facing each other. The space in between the mirror surfaces is essentially a resonance cavity.
How does a Fabry-Perot interference filter work?
This interferometer makes use of multiple reflections between two closely spaced partially silvered surfaces. Part of the light is transmitted each time the light reaches the second surface, resulting in multiple offset beams which can interfere with each other.
How does a Fabry-Perot laser work?
Fabry–Perot lasers have their frequency controlled by the spacing of mirrors at each end of the laser. The frequency control mechanism is such that the laser can oscillate simultaneously, or jump in rapid succession, to several wavelengths that are close to each other. This is sometimes called mode hopping.
What is the type of fringes formed in Fabry-Perot interferometer?
The fringes in a Fabry-Pérot interferometer are formed with light incident nearly normally (θ ≈ 0) on the air film bounded between the parallel inner faces of a pair of glass plates (for precision work, the space between the glass plates is evacuated) because the separation between the successive fringes is maximum for …
What is difference between Fabry-Perot interferometer and Fabry-Perot Etalon?
This Fabry-Perot interferometer or etalon is a folded Michelson interferometer. With a Fabry-Perot etalon we observe the interference pattern formed by light that is transmitted through two partially reflecting mirrors, while with a Michelson interferometer we observe the interference pattern formed by reflected light.
What is the difference between Fabry-Perot interferometer and Fabry-Perot Etalon?
What is the difference between Michelson and Fabry-Perot interferometer?
With a Fabry-Perot etalon we observe the interference pattern formed by light that is transmitted through two partially reflecting mirrors, while with a Michelson interferometer we observe the interference pattern formed by reflected light.