Patent ID: 9715072
Date: 2017-07-25
CPC Classifications: G02B,H01S

Claim:
1. An optical coupler in a vertical configuration, comprising: a first waveguide extending in a longitudinal direction, the first waveguide including a first core and a first cladding each having an optical index, a second waveguide distinct from the first waveguide, extending parallel to the first waveguide, the second waveguide including a second core and a second cladding having an optical index, the optical index of the first core of the first waveguide being lower than the optical index of the second cladding of the second waveguide, the optical coupler further comprising: a third waveguide distinct from the first and second waveguides and extending parallel to the first and second waveguides, the third waveguide being arranged between the first waveguide and the second waveguide in a transverse direction perpendicular to the longitudinal direction and having parameters influencing the evanescent wave coupling between the first waveguide and the second waveguide, those parameters being chosen such that the coupling is greater than 15%.