LOW-PROFILE OPTICAL COMMUNICATIONS MODULE HAVING TWO GENERALLY FLAT OPTICAL CONNECTOR MODULES THAT SLIDINGLY ENGAGE ONE ANOTHER

• US 20120063725A1
• Filed: 09/10/2010
• Published: 03/15/2012
• Est. Priority Date: 09/10/2010
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies Fiber IP Singapore PTE Limited (Broadcom, Inc.)
• Inventors: Meadowcroft, David J.K., Chen, Ye, Kaneshiro, Ron
• Granted Patent: US 8,620,122 B2
• Time in Patent Office: Days
• US Class Current: 385/88
• CPC Class Codes: G02B 6/3853 Lens inside the ferrule lensed connectors G02B6/32
• 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 6/4286 Optical modules with optical power monitoring
• CPC Class Codes: G02B 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Abstract

A low-profile optical communications module is provided that has two generally flat optical connector modules that slidingly engage one another to allow optical signals to be coupled between the optical connector modules. Because of the generally flat shapes of the optical connector modules and the manner in which they slidingly engage on another, the optical communications module has a very low profile that makes it well suited for use in thin devices, such as laptop and notebook computers and other electronics devices.

Claims

1. A low-profile optical communications module comprising:

a low-profile first optical connector module having generally planar upper and lower surfaces and at least one optical waveguide channel formed therein, each optical waveguide channel having a first end a second end and extending in directions that are generally parallel to the generally planar upper and lower surfaces;

a low-profile second optical connector module having generally planar upper and lower surfaces and at least one optical waveguide channel formed therein, each optical waveguide channel of the second low-profile optical connector module having a first end a second end and extending in directions that are generally parallel to the generally planar upper and lower surfaces of the second optical connector module, the first and second optical connector modules being in sliding engagement with each other such that the optical connector modules are movable into a fully engaged position by a sliding action of one or both of the optical connector modules in a direction that is generally parallel to the planar upper and lower surfaces of the connector modules;

a first optical coupling system disposed in the first optical connector module, the first optical coupling system receiving light propagating out of the second end of said at least one optical waveguide channel and directing the light in a direction toward the generally planar upper surface of the second optical connector module; and

a second optical coupling system disposed in the second optical connector module, wherein when the first and second optical connector modules are in the fully engaged position, the second optical coupling system receives light directed by the first optical coupling system toward the generally planar upper surface of the second optical connector module and directs the received light into the second end of said at least one optical waveguide channel formed in the second optical connector module.

2. The low-profile optical communications module of claim 1, wherein each optical connector module has at least two of the optical waveguide channels formed therein, the optical waveguide channels extending generally parallel to one another such that light propagating in the optical waveguide channels propagates in directions that are generally parallel to one another.

3. The low-profile optical communications module of claim 2, wherein light propagating in one of the optical waveguide channels of the first optical connector module propagates in a direction that is opposite to a direction in which light propagates in one of the optical waveguide channels of the second optical connector module, and wherein light propagating in one of the optical waveguide channels of the first optical connector module propagates in a same direction as light propagating in one of the optical waveguide channels of the second optical connector module.

4. The low-profile optical communications module of claim 1, wherein each of the first and second optical coupling systems includes an angled reflector.

5. The low-profile optical communications module of claim 4, wherein each of the first and second optical coupling systems includes at least one refractive lens.

6. The low-profile optical communications module of claim 5, wherein when the first and second optical connector modules are in the fully engaged position, the light propagating out of the second end of the optical waveguide channel of the first optical coupling system is incident on the angled reflector of the first optical coupling system and is reflected by the angled reflector of the first optical coupling system toward the generally planar upper surface of the second optical connector module, and wherein the light that is directed toward the generally planar upper surface of the second optical connector module by the angled reflector is received by said at least one refractive lens of the first optical coupling system and directed thereby onto said at least one refractive lens of the second optical coupling system, and wherein said at least one refractive lens of the second optical coupling system receives the light directed thereon by said at least one refractive lens of the first optical coupling system and directs the light onto the angled reflector of the second optical coupling system, and wherein the angled reflector of the second optical coupling system receives the light directed thereon by the angled reflector of the second optical coupling system and directs the light received thereby into the second end of said at least one optical waveguide channel formed in the second optical connector module.

7. The low-profile optical communications module of claim 6, wherein the angled reflectors are 45°

mirrors.

8. The low-profile optical communications module of claim 1, wherein the first ends of the optical waveguide channels are disposed adjacent respective ends of the first and second optical connector modules onto which ends of external optical waveguides are mechanically coupled such that light passing out of the end of the external optical waveguide coupled to the first optical connector module is received in the first end of said at least one optical waveguide channel of the first optical connector module and such that light propagating out of the first end of said at least one optical waveguide channel of the second optical connector module is received in the end of the external optical waveguide coupled to the second optical connector module.

9. The low-profile optical communications module of claim 1, further comprising:

a low-profile housing having a upper, lower, right-side, and left-side surfaces that together form a partial enclosure having front and back openings therein, wherein the front and back openings are shaped and sized to receive the first and second optical connector modules, respectively, when the first and second optical connector modules are in the fully engaged position, and wherein the upper and lower surfaces of the housing are generally parallel to the upper and lower surfaces of the first and second optical connector modules when the optical connector modules are in the fully engaged position.

10. The low-profile optical communications module of claim 9, wherein the first and second optical connector modules are made of plastic and the housing is made of sheet metal.

11. The low-profile optical communications module of claim 1, wherein the first and second optical connector modules have first and second wiper, respectively, disposed thereon for wiping portions of the second and first optical coupling systems to remove debris or dirt therefrom.

12. A method for optically coupling light between first and second low profile optical connector modules of an optical communications module, the method comprising:

providing a low-profile first optical connector module having generally planar upper and lower surfaces and at least one optical waveguide channel formed therein, each optical waveguide channel having a first end a second end and extending in directions that are generally parallel to the generally planar upper and lower surfaces;

providing a low-profile second optical connector module having generally planar upper and lower surfaces and at least one optical waveguide channel formed therein, each optical waveguide channel of the second low-profile optical connector module having a first end a second end and extending in directions that are generally parallel to the generally planar upper and lower surfaces of the second optical connector module;

slidingly engaging the low-profile first optical connector module with the second optical connector module by applying a sliding action on at least the first optical connector module in a direction that is generally parallel to the planar upper and lower surfaces of the first and second connector modules to cause the first and second optical connector modules to become fully engaged with one another in a fully engaged position;

propagating light along at least one of the optical waveguide channels of the first optical connector module in a direction from a first end of the optical waveguide channel to a second end of the optical waveguide channel;

with a first optical coupling system of the first optical connector module, receiving light propagating out of the second end of said at least one optical waveguide channel and directing the received light in a direction toward the generally planar upper surface of the second optical connector module; and

with a second optical coupling system of the second optical connector module, receiving light directed by the first optical coupling system toward the generally planar upper surface of the second optical connector module and directing the received light into the second end of one of the optical waveguide channels of the second optical connector module, wherein the optical waveguide channels of the first and second optical connector modules are generally parallel to one another.

13. The method of claim 12, wherein each optical connector module has at least two of the optical waveguide channels formed therein, the optical waveguide channels extending generally parallel to one another such that light propagating in the optical waveguide channels propagates in directions that are generally parallel to one another.

14. The method of claim 13, wherein light propagating in one of the optical waveguide channels of the first optical connector module propagates in a direction that is opposite to a direction in which light propagates in one of the optical waveguide channels of the second optical connector module, and wherein light propagating in one of the optical waveguide channels of the first optical connector module propagates in a same direction as light propagating in one of the optical waveguide channels of the second optical connector module.

15. The method of claim 12, wherein each of the first and second optical coupling systems includes an angled reflector.

16. The method of claim 15, wherein each of the first and second optical coupling systems includes at least one refractive lens.

17. The method of claim 16, wherein when the first and second optical connector modules are in the fully engaged position, the light propagating out of the second end of the optical waveguide channel of the first optical coupling system is incident on the angled reflector of the first optical coupling system and is reflected by the angled reflector of the first optical coupling system toward the generally planar upper surface of the second optical connector module, and wherein the light that is directed toward the generally planar upper surface of the second optical connector module is received by said at least one refractive lens of the first optical coupling system and directed thereby onto said at least one refractive lens of the second optical coupling system, and wherein said at least one refractive lens of the second optical coupling system receives the light directed thereon by said at least one refractive lens of the first optical coupling system and directs the light onto the angled reflector of the second optical coupling system, and wherein the angled reflector of the second optical coupling system receives the light directed thereon by the angled reflector of the second optical coupling system and directs the light received thereby into the second end of said at least one optical waveguide channel formed in the second optical connector module.

18. The method of claim 17, wherein the angled reflectors are 45°

mirrors.

19. The method of claim 12, wherein the first ends of the optical waveguide channels are disposed adjacent respective first ends of the first and second optical connector modules, and wherein ends of respective external optical waveguides are mechanically coupled to the first ends of the first and second optical connector modules such that light passing out of the end of the external optical waveguide coupled to the first optical connector module is received in the first end of said at least one optical waveguide channel of the first optical connector module and such that light propagating out of the first end of said at least one optical waveguide channel of the second optical connector module is received in the end of the external optical waveguide coupled to the second optical connector module.

20. An optical communications module comprising:

a low-profile first optical connector module having a generally flat shape and having at least upper and lower surfaces, and wherein at least one optical waveguide channel is formed in first optical connector module, each optical waveguide channel having a first end a second end;

a low-profile second optical connector module having a generally flat shape and having at least upper and lower surfaces, the lower and upper surfaces of the first and second optical connector modules, respectively, being generally parallel to each other, the first and second optical connector modules being in sliding engagement with each other such that the optical connector modules are movable into a fully engaged position by a sliding action of one or both of the optical connector modules in a direction that is generally parallel to the lower and upper surfaces of the first and second connector modules, respectively;

a first optical coupling system disposed in the first optical connector module, the first optical coupling system receiving light propagating out of the second end of said at least one optical waveguide channel and directing the light in a direction toward the lower and upper surfaces of the first and second optical connector modules, respectively; and

a second optical coupling system disposed in the second optical connector module, wherein when the first and second optical connector modules are in the fully engaged position, the second optical coupling system receives light directed by the first optical coupling system toward the upper surface of the second optical connector module and directs the received light onto at least one optical-to-electrical converter of the optical communications system.

21. An optical communications module comprising:

a low-profile first optical connector module having a generally flat shape and having at least upper and lower surfaces, and wherein at least one optical waveguide channel is formed in first optical connector module, each optical waveguide channel having a first end a second end;

a low-profile second optical connector module having a generally flat shape and having upper and lower surfaces, the lower and upper surfaces of the first and second optical connector modules, respectively, being generally parallel to each other, the first and second optical connector modules being in sliding engagement with each other such that the optical connector modules are movable into a fully engaged position by a sliding action of one or both of the optical connector modules in a direction that is generally parallel to the lower and upper surfaces of the first and second connector modules, respectively;

a second optical coupling system disposed in the second optical connector module, wherein when the first and second optical connector modules are in the fully engaged position, the second optical coupling system receives light produced by at least one electrical-to-optical converter of the optical communications module and directs a first portion of the received light onto the first optical coupling system and directs a second portion of the received light onto a monitoring optical-to-electrical converter of the optical communications module; and

a first optical coupling system disposed in the first optical connector module, wherein when the first and second connector modules are in the fully engaged position, the first optical coupling system receives said first portion of light and directs at least a portion of the first portion of the received light into the second end of said at least one optical waveguide channel of the first optical connector module such that the light propagates toward the first end of said at least one optical waveguide channel of the first optical connector module.