Waveguide lens for coupling laser light source and optical element

摘要

A waveguide lens includes a substrate, a planar waveguide, a media grating, and a pair of electrode. The planar waveguide is formed on the substrate and configured to couple with a laser light source that emits a laser beam into the planar waveguide along an optical axis. The media grating is formed on the planar waveguide and arranged symmetrically about a widthwise central axis that is collinear with the optical axis. The electrodes are formed on the substrate, positioned at two opposite sides of the waveguide lens, and arranged symmetrically about the optical axis.

主权项

1. A waveguide lens, comprising:
a substrate having a bottom surface and a top surface opposite to the bottom surface; a planar waveguide being substantially rectangular and comprising a lower surface located on the top surface, an upper surface opposite to the lower surface, a first sidewall perpendicular to the top surface and the lower surface, two second sidewalls opposite to each other and perpendicularly interconnected between the lower surface and the upper surface, the first sidewall configured to couple with a laser light source, the laser light source being configured to emit a laser beam into the planar waveguide along an optical axis that is perpendicular to the first sidewall; a media grating formed on the planar waveguide and being symmetrical about a widthwise central axis of the media grating that is collinear with the optical axis; and two electrodes formed on the top surface, positioned at two opposite sides of the waveguide lens, and arranged symmetrically about the optical axis, each electrode having a substantially L-shaped cross section along the direction of the first sidewall, the two electrodes facing each other and being spaced apart from each other, the two electrodes and the top surface of the substrate cooperatively forming a receiving room having a first opening and a second opening, the planar waveguide received in the receiving room, the first sidewall being exposed at the first opening, the upper surface being exposed at the second opening, and the two second sidewalls facing the two electrodes and entire shielded by the two electrodes.