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US 2022/0285915 A1Published application
Optical system and production method
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsCorrado SCIANCALEPORE, Houssein EL DIRANI
Life of this patent
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Abstract
An optical system is provided comprising a Bragg mirror comprising a ribbon part having a refractive index n1, corrugations having a refractive index n3 and a separation layer separating the ribbon from the corrugations and having a refractive index n2, such that n2<n3 and n2<n1. Also provided is a method for manufacturing such a mirror, and a laser comprising such a mirror as an output mirror.
Claims16
An optical system, comprising:
- a ribbon based on a first material having a first refractive index n1, said ribbon extending mainly in a first direction x and being intended to guide a propagation of a light radiation of wavelength λ in said first direction x,
- a first Bragg mirror formed from a first part of said ribbon, said first Bragg mirror further comprising corrugations at least at one face of said first ribbon part, said corrugations extending mainly in a second direction y normal to the first direction x and having a height h3 in a third direction z normal to the first and second directions, the corrugations of said first Bragg mirror being separated from said at least one face of the first ribbon part by a separation layer based on a second material having a thickness e2 in the third direction z and having a second refractive index n2, the corrugations being based on a third material having a third refractive index n3, such that n2<n3 and n2<n1,
- a second Bragg mirror comprising a second part of the ribbon,
- an optical cavity located between the first and second Bragg mirrors comprising a third part of the ribbon, and
- an amplifying medium based on a fourth material, at said third part of the ribbon.
2 more elements
A method for manufacturing an optical system, comprising:
- providing a ribbon based on a first material having a first refractive index n1, said ribbon extending mainly in a first direction x and having a face extending in a main extension plane xy formed by the first direction x and a second direction y normal to the first direction x,
- depositing, at least on a first part of said face of the ribbon, a separation layer based on a second material having a second refractive index n2 such that n2<n1, said separation layer having a thickness e2 in a third direction z normal to the first and second directions,
- depositing, on the separation layer, a disturbance layer based on a third material having a third refractive index n3, such that n2<n3, said disturbance layer having a thickness e3 taken in the third direction z,
- etching the disturbance layer so as to form corrugations extending mainly in the second direction y, and having a height h3≤e3 in the third direction z, said corrugations forming with the separation layer and the first part of the ribbon a first Bragg mirror,
- forming a second Bragg mirror at a second part of the ribbon, and
- transferring, at a third part of the ribbon located between the first and second parts, an amplifying medium based on a fourth material.
3 more elements
Dependencies are inferred from the claim text.