System for combining laser array outputs into a single beam carrying digital data

• US 8,979,338 B2
• Filed: 11/20/2013
• Issued: 03/17/2015
• Est. Priority Date: 12/19/2009
• Status: Active Grant

• Current Assignee: Lumentum Operations, LLC (Lumentum Holdings Inc.)
• Original Assignee: TriLumina Corp
• Inventors: Joseph, John R.
• Primary Examiner(s): Williams, Joseph L
• Application Number:
  US14/085,686
• Publication Number:
  US 20140079088A1
• Time in Patent Office: 482 Days
• Field of Search: 362/553, 362/19, 362/235, 362/552, 362/259
• US Class Current: 362/553
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: G02B 27/0905 Dividing and/or superposing multiple light beams
• CPC Class Codes: G02B 27/0961 Lens arrays lens arrays per se G02B3/0006
• CPC Class Codes: G02B 6/4214 the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device G02B6/4246 takes precedence
• CPC Class Codes: G02B 6/43 Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01S 5/4012 Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
• CPC Class Codes: H01S 5/4025 Array arrangements, e.g. constituted by discrete laser diodes or laser bar H01S5/42 takes precedence
• CPC Class Codes: H01S 5/423 having a vertical cavity

Abstract

Embodiments comprise laser emitter devices that generate a collimated beam of light the intensity or amplitude of which may be varied so as to carry data signals at a high rate of efficiency, and that is less sensitive to alignment of the detector, and detector systems for detecting the same collimated beam and reading the data carried in the beam of light.

Claims

1. A system for combining the output of semiconductor light devices to generate a single light beam, comprising:

a set of one or more semiconductor light devices configured to generate a plurality of light beams representing a first channel of data;

a binary string containing digital data, each bit from the binary string controlling a power of each of the one or more semiconductor light devices from the set of one or more semiconductor light devices, wherein an amplitude of a light beam generated by each semiconductor light device is determined by a position of a particular bit controlling each semiconductor light device, the amplitude encoding the digital data in the light beam;

a lens array positioned over the set of semiconductor light devices and configured to focus the plurality of light beams to a single focal point; and

a macro lens positioned beyond the lens array and configured to collimate the plurality of light beams into the single light beam carrying the digital data for the first channel.

2. The system as recited in claim 1, wherein the set of one or more semiconductor light devices includes one or more laser arrays.

3. The system as recited in claim 1, wherein the set of one or more semiconductor light devices are light emitting diodes.

4. The system as recited in claim 1, wherein the set of one or more semiconductor light devices are resonant cavity light emitting diodes.

5. The system as recited in claim 1, wherein the set of one or more semiconductor light devices include a plurality of laser chips.

6. The system as recited in claim 1, wherein the plurality of light beams include a plurality of wavelengths.

7. The system as recited in claim 1, wherein the macro lens is positioned at or near the single focal point.

8. The system as recited in claim 1, further comprising a second lens array positioned between the lens array and the macro lens and configured to change a location of the single focal point, to extend an offset of the set of one or more semiconductor light devices, to extend an offset of the lens array, and to direct the plurality of laser beams to a wider convergence that fits a numerical aperture of the macro lens.

9. The system as recited in claim 1, further comprising an array of detectors positioned in a far field of the single light beam, each of the detectors in the array of detectors having a different attenuation and being configured to detect multiple amplitude encoded signals from the single focal point at a rate of at least 1 gigabit per second.

10. The system as recited in claim 1, further comprising:

an electrical channel for controlling the set of one or more semiconductor light devices and upon which the set of one or more semiconductor light devices are mounted; and

a submount upon which the electrical channel is mounted.

11. The system as recited in claim 1, further comprising:

one or more sets of additional semiconductor light devices configured to generate one or more additional plurality of light beams representing one or more additional channels of data;

one or more additional binary strings containing digital data, each bit from the one or more additional binary strings controlling the power of each of the one or more additional semiconductor light devices from the one or more sets of additional semiconductor light devices, wherein the amplitude of the light beam generated by each additional semiconductor light device is determined by the position of the particular bit controlling each additional semiconductor light device, the amplitude encoding the digital data in the light beam; and

one or more additional lens arrays positioned over the one or more additional sets of semiconductor light devices and configured to focus the one or more additional plurality of light beams to the single focal point, wherein the macro lens is further configured to collimate the one or more additional plurality of light beams into the single light beam carrying the digital data for the one or more additional channels.

12. The system as recited in claim 11, wherein the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices include one or more laser arrays.

13. The system as recited in claim 11, wherein the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices are light emitting diodes.

14. The system as recited in claim 11, wherein the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices are resonant cavity light emitting diodes.

15. The system as recited in claim 11, wherein the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices include a plurality of laser chips.

16. The system as recited in claim 11, wherein the plurality of light beams and the one or more additional plurality of light beams include a plurality of wavelengths.

17. The system as recited in claim 11, wherein the macro lens is positioned at or near the single focal point.

18. The system as recited in claim 11, further comprising a second lens array positioned between the lens array, the one or more additional lens arrays and the macro lens and configured to change a location of the single focal point, to extend an offset of the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices, to extend an offset of the lens array and the one or more additional lens arrays, and to direct the plurality of laser beams and the one or more additional plurality of laser beams to a wider convergence that fits a numerical aperture of the macro lens.

19. The system as recited in claim 11, further comprising an array of detectors positioned in a far field of the single light beam, each of the detectors in the array of detectors having a different attenuation and being configured to detect multiple amplitude encoded signals from the single focal point at a rate of at least 1 gigabit per second.

20. The system as recited in claim 11, further comprising:

a first electrical channel for controlling the set of one or more semiconductor light devices and upon which the set of one or more semiconductor light devices are mounted;

one or more additional electrical channel for controlling the one or more sets of additional semiconductor light devices and upon which the one or more sets of additional semiconductor light devices are mounted; and

a submount upon which the first electrical channel and the one or more additional electrical channels are mounted.

21. The system as recited in claim 11, wherein the set of one or more semiconductor light devices and the lens arrays are formed within a first set of one or more laser chips, wherein the one or more sets of additional semiconductor light devices and the one or more additional lens arrays are formed with one or more additional laser chips, and wherein the first set of one or more laser chips and the one or more additional laser chips are mounted to a common submount.

22. The system as recited in claim 1, further comprising:

one or more sets of additional semiconductor light devices configured to generate one or more additional plurality of light beams representing one or more additional channels of data;

one or more additional binary strings containing digital data, each bit from the one or more additional binary strings controlling the power of each of the one or more additional semiconductor light devices from the one or more sets of additional semiconductor light devices, wherein the amplitude of the light beam generated by each additional semiconductor light device is determined by the position of the particular bit controlling each additional semiconductor light device, the amplitude encoding the digital data in the light beam;

wherein the one or more additional lens arrays are further positioned over the one or more additional sets of semiconductor light devices and configured to focus the one or more additional plurality of light beams to the single focal point, and wherein the macro lens is further configured to collimate the one or more additional plurality of light beams into the single light beam carrying the digital data for the one or more additional channels.

23. The system as recited in claim 22, wherein the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices include one or more laser arrays.

24. The system as recited in claim 22, wherein the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices are light emitting diodes.

25. The system as recited in claim 22, wherein the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices are resonant cavity light emitting diodes.

26. The system as recited in claim 22, wherein the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices include a plurality of laser chips.

27. The system as recited in claim 22, wherein the plurality of light beams and the one or more additional plurality of light beams include a plurality of wavelengths.

28. The system as recited in claim 22, wherein the macro lens is positioned at or near the single focal point.

29. The system as recited in claim 22, further comprising a second lens array positioned between the lens array, the one or more additional lens arrays and the macro lens and configured to change a location of the single focal point, to extend an offset of the set of one or more semiconductor light devices and the one or more sets of additional semiconductor light devices, to extend an offset of the lens array and the one or more additional lens arrays, and to direct the plurality of laser beams and the one or more additional plurality of laser beams to a wider convergence that fits a numerical aperture of the macro lens.

30. The system as recited in claim 22, further comprising an array of detectors positioned in a far field of the single light beam, each of the detectors in the array of detectors having a different attenuation and being configured to detect multiple amplitude encoded signals from the single focal point at a rate of at least 1 gigabit per second.

31. The system as recited in claim 22, further comprising:

a first electrical channel for controlling the set of one or more semiconductor light devices and upon which the set of one or more semiconductor light devices are mounted;

one or more additional electrical channel for controlling the one or more sets of additional semiconductor light devices and upon which the one or more sets of additional semiconductor light devices are mounted; and

a submount upon which the first electrical channel and the one or more additional electrical channels are mounted.

32. The system as recited in claim 22, wherein the set of one or more semiconductor light devices and the lens arrays are formed within a first set of one or more laser chips, wherein the one or more sets of additional semiconductor light devices and the one or more additional lens arrays are formed with one or more additional laser chips, and wherein the first set of one or more laser chips and the one or more additional laser chips are mounted to a common submount.