Spectral narrowing module, refined spectral line device and method therefor
AssigneesUniversite De Rennes 1, Centre National De La Recherche Scientifique
InventorsMehdi Alouini, Gwennaël Danion, Marc Vallet
Life of this patent
Estimating the term…
Abstract
Many applications require the use of lasers with short optical ray lengths. However, at present, there is no module that makes it possible to refine a ray from a light source in a satisfactory manner, in particular one from a semiconductor laser. The invention relates to a spectral refinement method (500), a device with refined spectral line (200) comprising at least one light source (210) and a spectral refinement module (100). The latter includes at least one first coupler (111), a Brillouin resonator (120) and a modulator (130).
Claims20
A spectral narrowing module for at least one first light source, the spectral narrowing module comprising:
- at least one first coupler;
- said at least one first coupler is configured to derive at least one first pumping light beam from a first incident light beam originating from said at least one first light source and introduced into the spectral narrowing module;
- a Brillouin resonator;
- the Brillouin resonator is configured to generate, from at least one portion of said first pumping light beam, at least one first resonant light beam;
- and
- a modulator;
- the modulator is configured to generate, from the first resonant light beam, at least one first modulated light beam;
- the spectral narrowing module is configured to totally or partially introduce the first modulated light beam into said at least one first coupler, said at least one first coupler is configured to totally or partially introduce the first modulated light beam into said at least one first light source so as to narrow the spectral line of said at least one first light source.
A spectral narrowing method for at least one first light source emitting a first incident light beam, the spectral narrowing method comprising:
- deriving of the first incident light beam originating from said at least one first light source so as to generate a light beam called first pumping light beam
- resonating at least one portion of said light beam called first pumping light beam with a Brillouin resonator so as to generate a first resonant light beam;
- modulating at least one portion of the first resonant light beam so as to generate at least one first modulated light beam;
- and
- introducing a portion or all of said at least one first modulated light beam into said at least one first light source.
Dependencies are inferred from the claim text.