Method and system for a bi-directional multi-wavelength receiver for standard single-mode fiber based on grating couplers

• US 10,020,884 B2
• Filed: 08/14/2017
• Issued: 07/10/2018
• Est. Priority Date: 02/03/2014
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Luxtera Incorporated (Cisco Systems, Inc.)
• Inventors: DeDobbelaere, Peter, Bergey, Christopher, Mekis, Attila
• Primary Examiner(s): Bocure, Tesfaldet
• Application Number:
  US15/676,197
• Publication Number:
  US 20170346567A1
• Time in Patent Office: 330 Days
• CPC Class Codes: G02B 6/12007 forming wavelength selective elements, e.g. multiplexer, demultiplexer
• CPC Class Codes: G02B 6/124 Geodesic lenses or integrated gratings
• CPC Class Codes: G02B 6/305 and having an integrated mode-size expanding section, e.g. tapered waveguide
• CPC Class Codes: G02B 6/34 utilising prism or grating G02B6/293 takes precedence
• CPC Class Codes: H04B 10/2589 Bidirectional transmission
• CPC Class Codes: H04B 10/40 Transceivers
• CPC Class Codes: H04B 10/506 Multiwavelength transmitters
• CPC Class Codes: H04J 14/0202 Arrangements therefor

Abstract

Methods and systems for a bi-directional receiver for standard single-mode fiber based on grating couplers may include, in an integrated circuit comprising an optoelectronic transceiver, a multi-wavelength grating coupler, and first and second optical sources coupled to the integrated circuit: coupling first and second source optical signals at first and second wavelengths into the photonically-enabled integrated circuit using the first and second optical sources, where the second wavelength is different from the first wavelength, receiving a first optical data signal at the first wavelength from an optical fiber coupled to the multi-wavelength grating coupler, and receiving a second optical data signal at the second wavelength from the optical fiber. Third and fourth optical data signals at the first and second wavelengths may be communicated out of the optoelectronic transceiver via the multi-wavelength grating coupler.

Claims

1. A method for communication, the method comprising:

in an integrated circuit comprising an optoelectronic transceiver, a multi-wavelength grating coupler, and first and second optical sources coupled to the integrated circuit;

coupling a first source optical signal at a first wavelength into the integrated circuit using the first optical source;

coupling a second source optical signal at a second wavelength different from the first wavelength into the integrated circuit using the second optical source;

receiving a first optical data signal at the first wavelength from an optical fiber coupled to the multi-wavelength grating coupler; and

receiving a second optical data signal at the second wavelength from the optical fiber coupled to the multi-wavelength grating coupler.

2. The method according to claim 1, comprising communicating a third optical data signal at the first wavelength out of the optoelectronic transceiver via the multi-wavelength grating coupler.

3. The method according to claim 2, comprising communicating a fourth optical data signal at the second wavelength out of the optoelectronic transceiver via a second multi-wavelength grating coupler.

4. The method according to claim 1, wherein the integrated circuit comprises a complementary metal-oxide semiconductor (CMOS) chip.

5. The method according to claim 1, wherein the optical fiber comprises a single mode fiber.

6. The method according to claim 1, wherein the multi-wavelength grating coupler comprises sections of curved waveguides, a first section configured for the first wavelength and a second section configured for the second wavelength.

7. The method according to claim 1, wherein the multi-wavelength grating coupler comprises a two-dimensional array of scattering elements located at intersections of two one-dimensionally periodic gratings.

8. A system for communication, the system comprising:

an integrated circuit comprising an optoelectronic transceiver, a multi-wavelength grating coupler, and first and second optical sources coupled to the integrated circuit, said integrated circuit being operable to;

couple a first source optical signal at a first wavelength into the integrated circuit using the first optical source;

couple a second source optical signal at a second wavelength different from the first wavelength into the integrated circuit using the second optical source;

receive a first optical data signal at the first wavelength from an optical fiber coupled to the multi-wavelength grating coupler; and

receive a second optical data signal at the second wavelength from the optical fiber coupled to the multi-wavelength grating coupler.

9. The system according to claim 8, wherein the integrated circuit is operable to communicate a third optical data signal at the first wavelength out of the optoelectronic transceiver via the multi-wavelength grating coupler.

10. The system according to claim 8, wherein the integrated circuit is operable to communicate a fourth optical data signal at the second wavelength out of the optoelectronic transceiver via a second multi-wavelength grating coupler.

11. The system according to claim 8, wherein the integrated circuit comprises a complementary metal-oxide semiconductor (CMOS) chip.

12. The system according to claim 8, wherein the optical fiber comprises a single mode fiber.

13. The system according to claim 8, wherein the multi-wavelength grating coupler comprises sections of curved waveguides, a first section configured for the first wavelength and a second section configured for the second wavelength.

14. The system according to claim 8, wherein the multi-wavelength grating coupler comprises a two-dimensional array of scattering elements located at intersections of two one-dimensionally periodic gratings.

15. A system for communication, the system comprising:

an integrated circuit comprising an optoelectronic transceiver, and first and second grating couplers, said photonically-enabled integrated circuit being operable to;

communicate a first optical data signal from the optoelectronic transceiver into a first fiber coupled to the first grating coupler;

receive a second optical data signal from the first optical fiber coupled to the first grating coupler;

communicate a third optical data signal from the optoelectronic transceiver into a second optical fiber coupled to the second grating coupler; and

receive a fourth optical data signal from the second optical fiber coupled to the second grating coupler.

16. The system according to claim 15, wherein the first and third optical data signals are at a first wavelength.

17. The system according to claim 16, wherein the second and fourth optical data signals are at a second wavelength different from the first wavelength.

18. The system according to claim 15, wherein the integrated circuit comprises a complementary metal-oxide semiconductor (CMOS) chip.

19. The system according to claim 15, wherein the first and second optical fibers comprise single mode fibers.

20. The system according to claim 15, comprising generating the first optical data signal utilizing a first optical source coupled to the integrated circuit and the second optical data signal utilizing a second optical source coupled to the integrated circuit.