Optic device comprising a plurality of resonant cavities of different lengths associated with different wavelengths
AssigneeCommissariat à l'Energie Atomique (CEA)
InventorFrancois Marion
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Abstract
The device comprises several resonant cavities of different lengths, in order to emit over several different wavelengths, depending on the length of the corresponding cavity. Each resonant cavity comprises a convex cap, preferably hemispherical, of transparent material for the emitted wavelengths. The convex cap defines, at one end of the cavity, an excessive thickness, of length li, which enables to vary the length of the corresponding cavity. The caps are, preferably, obtained by remelting cakes of preset dimensions, for example of selenium, on the material forming the cavities.
Claims14
An optic device comprising a plurality of resonant cavities of different lengths emitting and/or detecting at different corresponding wavelengths, wherein
- a plurality of first mirrors are located on a face of a common intermediate section having a constant thickness, each of the plurality of resonant cavities including one of the plurality of first mirrors,
- one of a plurality of solid, plano-convex caps, each having different thicknesses, is provided on an opposite face of the common intermediate section from each of a corresponding one of the plurality of first mirrors, said caps being made of a solid material transparent to said wavelengths,
- one of a plurality of second curved mirrors is provided on each of a corresponding one of the caps, and
- each one of the first mirrors and the corresponding one of the second mirrors delimit one of the plurality of resonant cavities, whereby a length of each of the plurality of resonant cavities is equal to the sum of the thickness of the intermediate section and the thickness of the corresponding cap.
Dependencies are inferred from the claim text.