Optical-fiber array method and apparatus

• US 8,503,840 B2
• Filed: 08/23/2010
• Issued: 08/06/2013
• Est. Priority Date: 08/23/2010
• Status: Expired due to Fees

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Hu, Yongdan, Lemaire, Charles A.
• Primary Examiner(s): PEACE, RHONDA S
• Application Number:
  US12/861,773
• Publication Number:
  US 20120045169A1
• Time in Patent Office: 1,079 Days
• Field of Search: 385 33- 35
• US Class Current: 385/33
• CPC Class Codes: B23K 1/0008 specially adapted for particular articles or work
• CPC Class Codes: B23K 1/0056 soldering by means of beams, e.g. lasers, E.B.
• CPC Class Codes: B23K 2101/32 Wires
• CPC Class Codes: B23K 2103/18 Dissimilar materials
• CPC Class Codes: B23K 2103/50 Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
• CPC Class Codes: B23K 2103/52 Ceramics
• CPC Class Codes: B23K 2103/54 Glass
• CPC Class Codes: B23K 26/26 of rectilinear seams
• CPC Class Codes: B23K 26/32 taking account of the properties of the material involved
• CPC Class Codes: G02B 6/262 Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
• CPC Class Codes: G02B 6/272 comprising polarisation means for beam splitting and combining
• CPC Class Codes: G02B 6/2726 in or on light guides, e.g. polarisation means assembled in a light guide
• CPC Class Codes: G02B 6/2773 Polarisation splitting or combining
• CPC Class Codes: G02B 6/2843 the couplers having polarisation maintaining or holding properties polarisation preserving light guides G02B6/105
• CPC Class Codes: G02B 6/29311 Diffractive element operating in transmission
• CPC Class Codes: G02B 6/32 having lens focusing means positioned between opposed fibre ends with lens being an integral part of the single fibre end G02B6/262
• CPC Class Codes: G02B 6/3652 the additional structures being prepositioning mounting areas, allowing only movement in one dimension, e.g. grooves, trenches or vias in the microbench surface, i.e. self aligning supporting carriers
• CPC Class Codes: G02B 6/3672 with fibres arranged in a regular matrix array
• CPC Class Codes: G02B 6/4296 coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

Method and apparatus for forming an optical-fiber-array assembly, which include providing a plurality of optical fibers including a first optical fiber and a second optical fiber, providing a fiber-array plate that includes a first surface and a second surface, connecting the plurality of optical fibers to the first surface of the fiber-array plate, transmitting a plurality of optical signals through the optical fibers into the fiber-array plate at the first surface of the fiber-array plate, and emitting from the second surface of the fiber-array plate a composite output beam having light from the plurality of optical signals. Optionally, the first surface of the fiber-array plate includes indicia configured to assist in the alignment of the plurality of optical fibers on the first surface of the fiber-array plate. In some embodiments, the second surface of the fiber-array plate includes a plurality of beam-shaping optics configured to shape the composite output beam.

Claims

1. An apparatus comprising:

a plurality of optical fibers configured to transmit a plurality of optical signals, wherein the plurality of optical fibers includes a first optical fiber configured to transmit a first optical signal and a second optical fiber configured to transmit a second optical signal; and

a fiber-array plate configured to receive the plurality of optical signals from the plurality of optical fibers and emit a composite output beam, wherein the fiber-array plate includes a first surface and a second optical-signal-output surface, wherein the plurality of optical fibers are connected to the first surface of the fiber-array plate to provide an uninterrupted all-glass propagation path for the plurality of optical signals propagating between the plurality of optical fibers and the second optical-signal-output surface of the fiber-array plate, wherein the second surface of the fiber-array plate includes a single convex curvature for both the first optical signal and the second optical signal.

2. The apparatus of claim 1, further comprising a support structure configured to support the plurality of optical fibers connected to the first surface of the fiber-array plate.

3. The apparatus of claim 1, wherein the second surface of the fiber-array plate also includes a concave curvature.

4. The apparatus of claim 1, wherein the plurality of optical fibers are butt welded to the first surface of the fiber-array plate.

5. The apparatus of claim 1, wherein the plurality of optical fibers are fused to the first surface of the fiber-array plate.

6. The apparatus of claim 1, wherein the first surface of the fiber-array plate includes indicia configured to assist in the alignment of the plurality of optical fibers on the first surface of the fiber-array plate.

7. The apparatus of claim 1, wherein the plurality of optical fibers are connected to the first surface such that the first optical fiber is substantially parallel to the second optical fiber.

8. The apparatus of claim 1, wherein the fiber-array plate is made from a material that includes monolithic fused silica.

9. A method comprising:

providing a plurality of optical fibers including a first optical fiber and a second optical fiber;

providing a fiber-array plate, wherein the fiber-array plate includes a first surface and a second optical-signal-output surface;

connecting the plurality of optical fibers to the first surface of the fiber-array plate;

transmitting a plurality of optical signals through the plurality of optical fibers and into the fiber-array plate at the first surface of the fiber-array plate, wherein the connecting includes providing an uninterrupted all-glass propagation path for the plurality of optical signals propagating between the plurality of optical fibers and the second optical-signal-output surface; and

emitting a composite output beam from the second optical-signal-output surface of the fiber-array plate, wherein the emitting of the composite output beam includes shaping the composite output beam, wherein the providing of the fiber-array plate includes providing a curved second surface of the fiber-array plate, and wherein the shaping of the composite output beam includes transmitting the plurality of optical signals through the curved second surface.

10. The method of claim 9, wherein the connecting of the plurality of optical fibers includes butt welding the plurality of optical fibers to the first surface of the fiber-array plate.

11. The method of claim 9, wherein the connecting of the plurality of optical fibers includes fusing the plurality of optical fibers to the first surface of the fiber-array plate.

12. The method of claim 9, wherein the providing of the fiber-array plate includes providing a plurality of lenslets on the second surface of the fiber-array plate, and wherein the shaping of the composite output beam includes transmitting the plurality of optical signals through the plurality of lenslets.

13. The method of claim 9, further comprising:

providing a support structure; and

supporting the plurality of optical fibers using the support structure during the connecting of the plurality of optical fibers to the first surface of the fiber-array plate.

14. The method of claim 9, wherein the providing of the fiber-array includes providing indicia on the first surface to assist alignment of the plurality of optical fibers during the connecting of the plurality of optical fibers to the first surface.

15. A method comprising:

providing a plurality of optical fibers including a first optical fiber and a second optical fiber;

providing a fiber-array plate, wherein the fiber-array plate includes a first surface and a second optical-signal-output surface;

connecting the plurality of optical fibers to the first surface of the fiber-array plate;

transmitting a plurality of optical signals through the plurality of optical fibers and into the fiber-array plate at the first surface of the fiber-array plate, wherein the connecting includes providing an uninterrupted all-glass propagation path for the plurality of optical signals propagating between the plurality of optical fibers and the second optical-signal-output surface; and

emitting a composite output beam from the second optical-signal-output surface of the fiber-array plate, wherein the emitting of the composite output beam includes shaping the composite output beam, wherein the providing of the fiber-array plate includes providing a single convex second surface of the fiber-array plate, and wherein the shaping of the composite output beam includes transmitting the plurality of optical signals through the single convex second surface.

16. A method comprising:

providing a plurality of optical fibers including a first optical fiber and a second optical fiber;

providing a fiber-array plate, wherein the fiber-array plate includes a first surface and a second optical-signal-output surface;

connecting the plurality of optical fibers to the first surface of the fiber-array plate;

transmitting a plurality of optical signals through the plurality of optical fibers and into the fiber-array plate at the first surface of the fiber-array plate, wherein the connecting includes providing an uninterrupted all-glass propagation path for the plurality of optical signals propagating between the plurality of optical fibers and the second optical-signal-output surface; and

emitting a composite output beam from the second optical-signal-output surface of the fiber-array plate, wherein the emitting of the composite output beam includes shaping the composite output beam, wherein the providing of the fiber-array plate includes providing a concave second surface of the fiber-array plate, and wherein the shaping of the composite output beam includes transmitting the plurality of optical signals through the concave second surface.

17. The method of claim 16, wherein the providing of the fiber-array plate includes providing a plurality of lenslets on the second surface of the fiber-array plate, and wherein the shaping of the composite output beam includes transmitting the plurality of optical signals through the plurality of lenslets.

18. The method of claim 16, further comprising:

providing a support structure; and

supporting the plurality of optical fibers using the support structure during the connecting of the plurality of optical fibers to the first surface of the fiber-array plate.

19. The method of claim 16, wherein the providing of the fiber-array includes providing indicia on the first surface to assist alignment of the plurality of optical fibers during the connecting of the plurality of optical fibers to the first surface.

20. The method of claim 16, wherein the connecting of the plurality of optical fibers includes fusing the plurality of optical fibers to the first surface of the fiber-array plate.