Optical coupling device with a holographic diffraction structure
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsChristophe Martinez, Daivid Fowler, Quentin Wilmart, Loïc Laplatine
Life of this patent
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Abstract
An optical coupling device (100) configured to optically couple a first optical guide device (102) to a second optical guide device (104), comprising at least one first optical input-output through which the first optical guide device is intended to emit and/or receive a first light beam (103), and a second optical input-output through which the second optical guide device is intended to receive and/or emit the first light beam, further including at least one holographic diffraction structure (108) configured to guide and adapt the first light beam between the first and second optical inputs-outputs of the optical coupling device.
Claims13
An optical coupling device configured to optically couple a first optical guide device to a second optical guide device, comprising:
- at least one first optical input-output through which the first optical guide device is configured to emit and/or receive a first light beam according to a first direction,
- a second optical input-output through which the second optical guide device is configured to receive and/or emit the first light beam according to a second direction,
- at least one holographic diffraction structure including:
- a first region representative of first interferences that occur between the first light beam when the latter is emitted in the first optical input-output of the optical coupling device according to the first direction and a second light beam emitted according to a third direction which is not parallel to the first direction and which meets the first light beam in the first region of the holographic diffraction structure;
- and
- a second region, distinct from the first region, and representative of second interferences that occur between a third light beam emitted in the second optical input-output of the optical coupling device parallel to the second direction and a fourth light beam, corresponding to a light beam conjugated with the second light beam, emitted according to a fourth direction opposite to the third direction and which meets the third light beam in the second region of the holographic diffraction structure.
A method for making an optical system, comprising at least:
- making a first optical guide device configured to emit and/or receive a first light beam according to a first direction, making a second optical guide device on a substrate over which the first optical guide device is arranged, the second optical guide device being configured to receive and/or emit the first light beam according to a second direction;
- making an optical coupling device including the following steps:
- depositing a holographic material layer over at least one region of the substrate at which a holographic diffraction structure is intended to be made;
- emitting a first write light beam by the first optical guide device according to the first direction, and a second write light beam according to a third direction which is not parallel to the first direction and which meets the first write light beam in a first region of the holographic diffraction structure which is representative of the interferences produced between the first and second write light beams;
- emitting a third write optical beam by the second optical guide device parallel to the second direction, and a fourth write light beam, corresponding to a light beam conjugated with the second write light beam, according to a fourth direction opposite to the third direction and which meets the third write light beam in a second region of the holographic diffraction structure which is representative of the interferences produced between the third and fourth write light beams.
Dependencies are inferred from the claim text.