Compensated photon detector
AssigneePsiquantum, Corp.
InventorsAvishai Benyamini, Eric F Dudley, Joseph Maria Fargas Cabanillas, Koustuban Ravi
Life of this patent
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Abstract
An optical device has an optical detector to detect light from an optical source, an optical returner that receives the light and forms returned light, and an optical coupler that couples the returned light from the optical returner to the optical detector. The optical coupler has a first waveguide and a second waveguide separated by a gap that tapers towards the optical returner, the first waveguide and second waveguide having waveguide walls that are tilted at an angle to a propagation direction along the optical coupler to cancel crosstalk between the first waveguide and the second, waveguide.
Claims20
An optical device comprising:
- an optical detector to detect light from an optical source;
- an optical returner that receives the light and forms returned light;
- and
- an optical coupler that couples the returned light from the optical returner to the optical detector, the light being coupled into the optical coupler from the optical detector along a propagation direction, the returned light being coupled into the optical detector, the optical coupler comprising a first waveguide and a second waveguide separated by a gap that tapers towards the optical returner, the first waveguide and second waveguide having waveguide walls that are tilted at an angle to the propagation direction along the optical coupler to cancel crosstalk between the first waveguide and the second waveguide.
A method comprising:
- detecting, using an optical detector, light from an optical source;
- forming returned light from the light using an optical returner;
- receiving, using an optical coupler, the light from the optical detector, the light being coupled to the optical detector from the optical coupler along a propagation direction;
- and
- coupling the returned light to the optical detector using the optical coupler, the light being coupled into the optical coupler from the optical detector along the propagation direction, the returned light being coupled into the optical detector, the optical coupler comprising a first waveguide and a second waveguide separated by a gap that tapers towards the optical returner, the first waveguide and second waveguide having waveguide walls that are tilted at an angle to the propagation direction along the optical coupler to cancel crosstalk between the first waveguide and the second waveguide.
Dependencies are inferred from the claim text.