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In optics, a Fabry–Pérot interferometer (FPI) or etalon is an optical cavity made from two parallel reflecting surfaces (i.e.: thin mirrors). Optical waves can pass through the optical cavity only when they are in resonance with it. It is named after Charles Fabry and Alfred Perot, who developed the instrument in 1899.
The plane-parallel resonator is also the basis of the Fabry–Pérot interferometer. For a resonator with two mirrors with radii of curvature R 1 and R 2, there are a number of common cavity configurations. If the two radii are equal to half the cavity length (R 1 = R 2 = L / 2), a concentric or spherical resonator results.
A ring modulator placed in a Fabry-Perot laser cavity was reported to eliminate the tuning power by automatic matching of the laser wavelength with that of the ring modulator while maintaining high-speed ultralow-power modulation of a Si microring modulator.
Fabry–Pérot thin-film etalons are used in narrow bandpass filters capable of selecting a single spectral line for imaging; for example, the H-alpha line or the Ca-K line of the Sun or stars. Fig. 10 shows an Extreme ultraviolet Imaging Telescope (EIT) image of the Sun at 195 Ångströms (19.5 nm), corresponding to a spectral line of multiply ...
ARROW relies on the principle of thin-film interference. It is created by forming a Fabry-Perot cavity in the transverse direction, with cladding layers that function as Fabry-Perot etalons. [1] A Fabry-Perot etalon is in resonance when the light in the layer constructively interferes with itself, resulting in high transmission.
The first of these highly accurate experiments was conducted by Brillet & Hall (1979), in which they analyzed a laser frequency stabilized to a resonance of a rotating optical Fabry–Pérot cavity. They set a limit on the anisotropy of the speed of light resulting from the Earth's motions of Δ c / c ≈ 10 −15 , where Δ c is the difference ...
Marie Paul Auguste Charles Fabry ForMemRS [1] [2] (French: [maʁi pɔl oɡyst ʃaʁl fabʁi]; 11 June 1867 – 11 December 1945) was a French physicist working on optics. [3] [4] Together with Alfred Pérot he invented the Fabry–Pérot interferometer. He is also one of the co-discoverers of the ozone layer.
a) Facet feedback and wavelength resonances in the optical emission spectrum of a multimode Fabry-Perot laser; b) power spectral density of a superluminescent light emitting diode. When an electrical forward voltage is applied, an injection current across the active region of the SLED is generated.