Method and device for aligning a laser and a waveguide
AssigneeDustPhotonics
InventorYoel Chetrit
Life of this patent
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Abstract
A device and a method for aligning a laser unit to a waveguide unit. The method may include (a) placing the laser unit in a tested position in which the laser unit faces the waveguide unit;(b) supplying light, via a coupler of the waveguide unit, to an alignment waveguide of the waveguide unit; (c) receiving light emitted from the alignment waveguide; wherein the light was emitted as result of the supplying of the light; (d) determining whether the light emitted from the alignment comprises a spectral signature associated with an alignment unit of the laser unit; and (e) estimating whether the laser unit is aligned to the waveguide unit based on the determining of step (d).
Claims24
A method for aligning a laser unit to a waveguide unit, the method comprising:
- placing the laser unit in a tested position in which the laser unit faces the waveguide unit;
- supplying light, via a coupler of the waveguide unit, to an alignment waveguide of the waveguide unit;
- receiving light emitted from the alignment waveguide;
- wherein the light was emitted as result of the supplying of the light;
- determining whether the light emitted from the alignment comprises a spectral signature associated with an alignment unit of the laser unit;
- and
- estimating whether the laser unit is aligned to the waveguide unit based on the determining;
- and
- wherein the alignment unit is a first Bragg grating and wherein the method comprises attenuating light that passed through the first Bragg grating by a second Bragg grating.
A device, comprising a laser unit and a waveguide unit;
- wherein the laser unit comprises a laser and an alignment unit;
- wherein the waveguide unit comprises an alignment waveguide and a coupler;
- wherein the coupler is configured to receive light from a light source and to provide the light to the alignment waveguide;
- wherein the alignment waveguide is configured to direct the light towards the laser unit;
- wherein when aligned to the waveguide unit the alignment unit is configured to reflect light having a spectral signature of the alignment unit towards the alignment waveguide;
- wherein when misaligned to the waveguide unit the laser unit is configured to reflect light without the spectral signature of the alignment unit towards the alignment waveguide;
- wherein the alignment waveguide is configured to direct the reflected light towards the coupler;
- wherein the coupler is configured to direct the reflected light towards a detector;
- and
- wherein the alignment unit is a first Bragg grating and wherein the method comprises attenuating light that passed through the first Bragg grating by a second Bragg grating.
Dependencies are inferred from the claim text.