Integrated multistage taper coupler for waveguide to fiber coupling
First Claim
Patent Images
1. A device comprising:
- a compression region, the compression region operable to;
receive an optical beam from a semiconductor waveguide,compress the optical beam to have a smaller cross section compared to light confined in the semiconductor waveguide, andtransmit optical beam to an expansion region; and
the expansion region, the expansion region operable to;
receive the optical beam from the compression region,expand the optical beam to have a larger cross section compared to light confined in the semiconductor waveguide, andtransmit the optical beam to an optical fiber, wherein the expansion region has a refractive index equal to or greater than 1.47 and equal to or less than 2.1.
1 Assignment
0 Petitions
Accused Products
Abstract
A waveguide coupler has a compression region and an expansion region for coupling light between a silicon waveguide and an optical fiber. The compression region receives light from the silicon waveguide and compresses an optical mode of the light. Light is transmitted from the compression region to an expansion region. The expansion region expands the light to have a larger cross section. Light is then transmitted to the optical fiber.
19 Citations
20 Claims
-
1. A device comprising:
-
a compression region, the compression region operable to; receive an optical beam from a semiconductor waveguide, compress the optical beam to have a smaller cross section compared to light confined in the semiconductor waveguide, and transmit optical beam to an expansion region; and the expansion region, the expansion region operable to; receive the optical beam from the compression region, expand the optical beam to have a larger cross section compared to light confined in the semiconductor waveguide, and transmit the optical beam to an optical fiber, wherein the expansion region has a refractive index equal to or greater than 1.47 and equal to or less than 2.1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method for coupling a semiconductor waveguide to an optical fiber, the method comprising:
-
transmitting a beam of light from a waveguide into an optical coupler; compressing the beam of light received from the waveguide in a first region of the optical coupler; expanding the beam of light in a second region of the optical coupler after compressing the beam of light in the first region, wherein the first region has a higher index of refraction than the second region; and transmitting the beam of light from the optical coupler to an optical fiber after expanding the beam of light in the second region of the optical coupler. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
Specification