Attenuator and conditioner

• US 7,021,836 B2
• Filed: 12/26/2000
• Issued: 04/04/2006
• Est. Priority Date: 12/26/2000
• Status: Active Grant

• Current Assignee: Sumitomo Electric Device Innovations, U.S.A., Inc. (Sumitomo Corporation)
• Original Assignee: Emcore Corporation
• Inventors: Peterson, David W., Bryan, Robert P., Kemme, Shanalyn Adair, Anderson, Gene R., Carson, Richard F., Armendariz, Marcelino G., Duckett, Edwin B. III, McCormick, Frederick B.
• Primary Examiner(s): Ullah, Akm Enayet
• Assistant Examiner(s): Rahll, Jerry T
• Application Number:
  US09/749,282
• Publication Number:
  US 20040141709A1
• Time in Patent Office: 1,925 Days
• Field of Search: 385/48, 385/53, 385 88- 94, 385134-135, 385/140
• US Class Current: 385/89
• CPC Class Codes: G02B 6/3881 using grooves to align ferrule ends
• CPC Class Codes: G02B 6/3885 Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type optical ribbon cable G02B6/4403, G02B6/448
• 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 6/4228 Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements G02B6/4234 takes precedence
• CPC Class Codes: G02B 6/4246 Bidirectionally operating package structures
• CPC Class Codes: G02B 6/4249 comprising arrays of active devices and fibres
• CPC Class Codes: G02B 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/01039 Yttrium [Y]
• CPC Class Codes: H01L 2924/01078 Platinum [Pt]
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 2924/12041 LED
• CPC Class Codes: H01L 2924/3025 Electromagnetic shielding
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence

Abstract

An apparatus and method of attenuating and/or conditioning optical energy for an optical transmitter, receiver or transceiver module is disclosed. An apparatus for attenuating the optical output of an optoelectronic connector including: a mounting surface; an array of optoelectronic devices having at least a first end; an array of optical elements having at least a first end; the first end of the array of optical elements optically aligned with the first end of the array of optoelectronic devices; an optical path extending from the first end of the array of optoelectronic devices and ending at a second end of the array of optical elements; and an attenuator in the optical path for attenuating the optical energy emitted from the array of optoelectronic devices. Alternatively, a conditioner may be adapted in the optical path for conditioning the optical energy emitted from the array of optoelectronic devices.

Claims

1. An apparatus for attenuating the optical output of an optoelectronic connector, the apparatus comprising:

a mounting surface;

an array of optoelectronic devices adapted to the mounting surface, the optoelectronic devices having at least a first end;

an array of optical fibers, the array of optical fibers having at least a first and a second end;

the first end of the array of optical fibers positioned relative to the first end of the array of optoelectronic devices in such a manner that one or more optical fibers is optically aligned to one or more optoelectronic devices;

an optical path extending from the first end of the array of optoelectronic devices,

proceeding into the array of optical fibers and terminating at the second end of the array of optical fibers; and

an attenuator in the optical path, where the attenuator is capable of attenuating the optical energy emitted from one or more optoelectronic devices, wherein the attenuator comprises utilizing wavy-glass in at least a portion of the optical fiber.

2. An apparatus as in claim 1, wherein the attenuator comprises an attenuating coating on the first end of the array of optoelectronic devices.

3. An apparatus as in claim 1, wherein the attenuator comprises an attenuating coating on the first end of the array of optical fibers.

4. An apparatus as in claim 1, wherein the attenuator comprises an attenuating coating on the second end of the array of optical fibers.

5. An apparatus as in claim 1, wherein the attenuator comprises an attenuating coating on a surface of the optical fibers.

6. An apparatus as in claim 1, wherein the attenuator is capable of reflecting optical energy.

7. An apparatus as in claim 1, wherein the attenuator is capable of scattering optical energy.

8. An apparatus as in claim 1, wherein the attenuator is capable of absorbing optical energy.

9. An apparatus as in claim 1, wherein the attenuator comprises a diffractive lens positioned at an interstitial space between the first end of the array of optoelectronic devices and the first end of the array of optical fibers.

10. An apparatus as in claim 1, wherein the attenuator comprises utilizing bubbles formed on an inner surface of at least a portion of the optical fiber.

11. An apparatus as in claim 1, wherein the attenuator comprises utilizing smoked glass in at least a portion of the optical fiber.

12. An apparatus as in claim 1, wherein the attenuator comprises utilizing frosted-glass in at least a portion of the optical fiber.

13. An apparatus as in claim 1, wherein the attenuator comprises utilizing roughened inner surfaces in at least a portion of the optical fiber.

14. An apparatus as in claim 1, wherein the optoelectronic devices comprise vertical cavity surface emitting lasers.

15. An apparatus as in claim 14, wherein the vertical cavity surface emitting lasers comprise oxide vertical cavity surface emitting lasers.

16. An apparatus for conditioning the optical output of an optoelectronic connector, the apparatus comprising:

a mounting surface;

an array of optoelectronic devices adapted to the mounting surface the optoelectronic devices having at least a first end;

an array of optical fibers the array of optical fibers having at least a first and a second end;

the first end of the array of optical fibers positioned relative to the first end of the array of optoelectronic devices in such a manner that one or more optical fibers is optically aligned to one or more optoelectronic devices;

an optical path extending from the first end of the array of optoelectronic devices, proceeding into the array of optical elements and terminating at the second end of the array of optical fibers; and

a conditioner in the optical path, where the conditioner is capable of conditioning the

launch of the optical energy into the optical fibers by conditioning the optical energy emitted from the array of optoelectronic devices, wherein the conditioner comprises utilizing wavy-glass in at least a portion of the optical fiber.

17. An apparatus as in claim 16, wherein the optoelectronic devices comprise photodetectors.

18. An apparatus as in claim 16, wherein the optoelectronic devices comprise vertical cavity surface emitting lasers.

19. An apparatus as in claim 18, wherein the vertical cavity surface emitting lasers comprise oxide vertical cavity surface emitting lasers.

20. An apparatus as in claim 16, wherein the conditioner comprises utilizing bubbles formed on an inner surface of at least a portion of the optical fiber.

21. An apparatus as in claim 16, wherein the conditioner comprises utilizing roughened inner surfaces in at least a portion of the optical fiber.

22. An apparatus as in claim 16, wherein the conditioner comprises utilizing frosted-glass in at least a portion of the optical fiber.

23. An apparatus as in claim 16, wherein the conditioner comprises utilizing smoked glass in at least a portion of the optical fiber.

24. An apparatus as in claim 16, wherein the conditioner comprises a diffractive lens positioned at an interstitial space between the first end of the array of optoelectronic devices and the first end of the array of optical fiber.

25. An apparatus as in claim 16, wherein the conditioner is capable of changing the phase distribution of the optical energy that is emitted by the optoelectronic devices.

26. An apparatus as in claim 16, wherein the conditioner is capable of changing the distribution of power that is emitted by the optoelectronic devices.

27. An apparatus as in claim 16, wherein the conditioner comprises a coating on the first end of the array of optoelectronic devices.

28. An apparatus as in claim 16, wherein the conditioner comprises a coating on the first end of the array of optical fibers.

29. An apparatus as in claim 16, wherein the conditioner comprises a coating on the second end of the array of optical fibers.

30. An apparatus as in claim 16, wherein the conditioner comprises a coating on an inner surface of the optical fibers.