SINGLE CHIP SCANNING LIDAR AND METHOD OF PRODUCING THE SAME

摘要

A chip-scale scanning lidar includes a two dimensional (2D) scanning micromirror for a transmit beam and a 2D scanning micromirror for a receive beam, a laser diode and a photodetector, a first waveguide and first grating outcoupler coupled to a front facet of the laser diode, a second waveguide and a second grating outcoupler coupled to a rear facet of the laser diode on a substrate. A first fixed micromirror, a second micromirror, a third micromirror, and a focusing component are in a dielectric layer bonded to the substrate over the laser diode and photodetector. The photodetector is optically coupled to the second fixed micromirror and the third fixed micromirror for coherent detection.

主权项

1. A method of fabricating a chip-scale scanning lidar comprising:
forming a two dimensional (2D) scanning micromirror for a transmit beam on a substrate; forming a two dimensional (2D) scanning micromirror for a receive beam on the substrate; forming a laser diode on the substrate; forming a photodetector on the substrate; forming a first waveguide on the substrate coupled to a front facet of the laser diode; forming a first grating outcoupler on the substrate coupled to the first waveguide; forming a second waveguide on the substrate coupled to a rear facet of the laser diode; forming a second grating outcoupler on the substrate coupled to the second waveguide; forming a first fixed micromirror and a second fixed micromirror in a first dielectric layer; forming a third fixed micromirror in a second dielectric layer; forming a focusing component in a third dielectric layer; bonding the first, second and third dielectric layers together to form a composite structure; aligning the composite structure to the substrate over the laser diode and photodetector; and bonding the composite structure to the substrate over the laser diode and photodetector.