Optical connection component

• US 8,197,147 B2
• Filed: 12/22/2006
• Issued: 06/12/2012
• Est. Priority Date: 09/13/2006
• Status: Expired due to Fees

• Current Assignee: Edith Cowan University, Ytel Photonics Inc.
• Original Assignee: Edith Cowan University, Ytel Photonics Inc.
• Inventors: Lee, Yong Tak, Alameh, Kamal
• Primary Examiner(s): Healy, Brian
• Application Number:
  US12/440,916
• Publication Number:
  US 20100014806A1
• Time in Patent Office: 1,999 Days
• Field of Search: 385/14, 385/15, 385/31, 385/32, 385/33, 385/34, 385/88, 385/89, 385/92, 385/93, 385/94, 385/24, 385/129, 385/130, 385/131, 385/132, 398/135, 398/136, 398/137, 398/138, 398/139, 372/50.23
• US Class Current: 385/93
• CPC Class Codes: G02B 6/4204 the coupling comprising intermediate optical elements, e.g. lenses, holograms encapsulated active devices H01S5/02208, H01L33/52

Abstract

The present invention provides an optical connection component which comprises a solid state laser component for emitting a modulated beam of light in response to an applied electrical signal. The optical connection component also comprises an optical lens positioned relative to the solid state laser component at a predetermined position in which the optical lens reduces divergence of the emitted beam of light. The optical lens is formed at the predetermined position in a manner such that the optical lens is immobile relative to the solid state laser component. The optical connection component further comprises an optical waveguide having a core for guiding the light. The optical waveguide has first and second end-portions. The first end-portion is positioned for coupling the modulated light from the optical lens into the core. In addition, the optical connection component comprises a receiver for receiving the modulated light from the second end-portion of the optical waveguide and arranged for converting the modulated light into a corresponding electrical signal.

Claims

1. A high speed optical connection component, comprising:

a solid state laser component for emitting a modulated beam of light in response to an applied electrical signal;

an optical lens positioned relative to the solid state laser component at a predetermined position in which the optical lens reduces in use divergence of the emitted beam of light, the optical lens being formed on a portion of the solid state laser component and at the predetermined position in a manner such that the optical lens is immobile relative to the solid state laser component;

an optical waveguide having a core for guiding the light, the optical waveguide having first and second end-portions, the first end-portion being positioned for coupling the modulated light from the optical lens into the core;

a receiver for receiving the modulated light from the second end-portion of the optical waveguide and arranged for converting the modulated light into a corresponding electrical signal; and

wherein the optical lens is arranged for reduction of divergence of the emitted laser light in a manner such that substantially low-loss coupling of the emitted laser light into the core of the optical waveguide is possible if the first end-portion of the optical waveguide is positioned within a distance from the optical lens, the distance being larger than at least twice the diameter of the core of the optical waveguide.

2. The optical connection component of claim 1 wherein the optical lens and the solid state laser component are monolithically integrated.

3. The optical connection component of claim 1 being arranged for transmission of data at a speed of more than 10 Gb/s.

4. The optical connection component of claim 1 wherein the optical waveguide is an optical fibre.

5. The optical connection component of claim 1 wherein the core diameter is 30 μ

m or less and the distance is at least 100 μ

m.

6. The optical connection component of claim 1 wherein the optical lens is positioned and arranged so that in use the emitted laser light is substantially collimated by the optical lens.

7. The optical connection component of claim 1 wherein the solid state laser is a vertical-cavity surface-emitting laser (VCSEL) and wherein the receiver is a resonant cavity enhanced photodiode (RCE-PD).

8. The optical connection component of claim 1 wherein the solid state laser comprises a distributed Bragg reflector (DBR) and the optical lens is formed on an exterior surface of the DBR.

9. The optical connection component of claim 1 wherein the waveguide is an optical fibre, the optical connection component comprising a first and a second mechanical connection element, the first mechanical connection element being arranged for holding a first end-portion of the optical fibre in first predetermined position relative to the first mechanical connection element and the second mechanical connection element being arranged for holding a second end-portion of the optical fibre in second predetermined position relative to the second mechanical connection element,

wherein the first predetermined position is selected so that light can be coupled from the solid state laser component into the core of the optical fibre without substantial coupling losses and the second predetermined position is selected so that light can be coupled from the core of the optical fibre into the receivers without substantial coupling losses.

10. The optical connection component as claimed in claim 1 further comprising a metallic substrate or layer on which at least one optical element, provided in the form of the solid state laser component or the receiver, is positioned.

11. The optical connection component as claimed in claim 1 further comprising:

an insulating layer adjacent at least one side portion of at least one optical element which is provided in the form of the solid state laser component or the receiver; and

electrically conductive layer portions electrically connected to the, or a respective, optical element, the electrically conductive layer portions overlapping the insulating layer and extending away from the, or a respective, optical element so that electrical connection of the or each optical element can be achieved by contacting the electrical conductive layer portions at a location that is remote from the or each optical element.

12. An optical connection system comprising a plurality of the optical connection components as claimed in claim 1 and being arranged for parallel transmission of data and wherein the solid state laser components and the receivers are arranged in arrays.

13. The optical connection system of claim 12 wherein the solid state laser components comprise first and second groups of solid state laser components and the receivers comprise first and second groups of receivers, the first group of the solid state laser components being positioned adjacent the first group of the receivers and a second group of the solid state laser components being positioned adjacent a second group of the receivers.

14. The system of any one of claim 13 wherein the waveguides are optical fibres, the system comprising first and second mechanical connection elements, the first mechanical connection elements being arranged for holding the first end-portions of the optical fibres in first predetermined positions relative to the first mechanical connection elements and the second mechanical connection elements being arranged for holding the second end-portions of the optical fibres in second predetermined positions relative to the second mechanical connection elements,

wherein the first predetermined positions are selected so that light can be coupled from the solid state laser components into the cores of the optical fibres without substantial coupling losses and the second predetermined positions are selected so that light can be coupled from the cores of the optical fibres into the receivers without substantial coupling losses.

15. The system of claim 14 wherein the first and second mechanical connection elements have first and second guiding pins, the system further comprising at least one circuit board having corresponding first and second apertures for receiving respective guiding pins and wherein the first guiding pins and the first apertures are positioned so that the first end-portions of the optical fibres are positioned in the first predetermined positions when the first guiding pins are received by the first apertures and wherein the second guiding pins and the second apertures are positioned so that the second end-portions of the optical fibres are positioned in the second predetermined positions when the second guiding pins are received by the second apertures.

20. The optical connection component of claim 1 wherein the core diameter is 30 μ

m or less and the distance is less than 200 μ

m.

21. The optical connection component of claim 1 wherein the core diameter is 30 μ

m or less and the distance is less than 300 μ

m.

16. An electronic circuitry comprising at least one optical element, the or each optical element having electric contacts and the electronic circuitry further comprising:

a metallic substrate or layer on which the or each optical element is positioned,

an insulating layer positioned over portions of the metallic substrate and adjacent at least one side portion of the or each optical element;

electrically conductive layer portions electrically connected to the, or a respective, optical element, the electrically conductive layer portions overlapping the insulating layer and extending away from the, or a respective, optical element so that electrical connection of the or each optical element can be achieved by contacting the electrical conductive layer portions at a location that is remote from the or each optical element.

17. A high speed optical connection component, comprising:

a solid state laser component for emitting a modulated beam of light in response to an applied electrical signal;

an optical lens positioned relative to the solid state laser component at a position in which the optical lens reduces in use divergence of the emitted beam of light, the optical lens being formed on a portion of the solid state laser component and at the predetermined position in a manner such that the optical lens is immobile relative to the solid state laser component;

an optical fibre having a core, the optical fibre having first and second end-portions, the first end-portion being positioned for coupling the modulated light from the optical lens into the core;

a receiver for receiving the modulated light from the second end-portion of the optical fibre and arranged for converting the modulated light into a corresponding electrical signal;

at least one circuit board having first and second apertures; and

first and second mechanical connection elements which are movable relative to the at least one circuit board, the first mechanical connection element being arranged for holding the first end-portion of the optical fibre in a first predetermined position and the second mechanical connection element being arranged for holding the second end-portion of the optical fibre in a second predetermined position, the first and second mechanical connection elements having first and second guiding pins, respectively, which are arranged for being received by the first and second apertures, respectively, of the at least one circuit board;

wherein the first guiding pin and the first aperture are positioned so that the first end-portion of the optical fibre is positioned in the first predetermined position when the first guiding pin is received by the first aperture and wherein the second guiding pin and the second aperture are positioned so that the second end-portion of the optical fibre is positioned in the second predetermined position when the second guiding pin is received by the second aperture, and

wherein the first predetermined position is selected so that the modulated light can be coupled from the solid state laser component into the optical fibre without substantial coupling losses and the second predetermined positions is selected so that the modulated light can be coupled from the optical fibre into the receiver without substantial coupling losses.

18. A high speed optical connection component, comprising:

a solid state laser component for emitting a modulated beam of light in response to an applied electrical signal;

an optical lens positioned relative to the solid state laser component at a predetermined position in which the optical lens reduces in use divergence of the emitted beam of light, the optical lens being formed on a portion of the solid state laser component and at the predetermined position in a manner such that the optical lens is immobile relative to the solid state laser component;

an optical waveguide having a core for guiding the light, the optical waveguide having first and second end-portions, the first end-portion being positioned for coupling the modulated light from the optical lens into the core;

a receiver for receiving the modulated light from the second end-portion of the optical waveguide and arranged for converting the modulated light into a corresponding electrical signal; and

a metallic substrate or layer on or over which the solid state laser component is positioned.

19. A high speed optical connection component, comprising:

a solid state laser component for emitting a modulated beam of light in response to an applied electrical signal;

an optical lens positioned relative to the solid state laser component at a predetermined position in which the optical lens reduces in use divergence of the emitted beam of light, the optical lens being formed on a portion of the solid state laser component and at the predetermined position in a manner such that the optical lens is immobile relative to the solid state laser component;

an optical waveguide having a core for guiding the light, the optical waveguide having first and second end-portions, the first end-portion being positioned for coupling the modulated light from the optical lens into the core;

a receiver for receiving the modulated light from the second end-portion of the optical waveguide and arranged for converting the modulated light into a corresponding electrical signal;

an insulating layer adjacent at least one side portion of the solid state laser component; and

electrically conductive layer portions electrically connected to the solid state laser component, the electrically conductive layer portions overlapping the insulating layer and extending away from the solid state laser component so that electrical connection of solid state laser component can be achieved by contacting the electrical conductive layer portions at a location that is remote from solid state laser component.

22. A high speed optical connection component, comprising:

a solid state laser component for emitting a modulated beam of light in response to an applied electrical signal;

an optical lens positioned relative to the solid state laser component at a predetermined position in which the optical lens reduces in use divergence of the emitted beam of light, the optical lens being formed on a portion of the solid state laser component and at the predetermined position in a manner such that the optical lens is immobile relative to the solid state laser component;

an optical waveguide having a core for guiding the light, the optical waveguide having first and second end-portions, the first end-portion being positioned for coupling the modulated light from the optical lens into the core; and

a receiver for receiving the modulated light from the second end-portion of the optical waveguide and arranged for converting the modulated light into a corresponding electrical signal;

wherein the core of the optical waveguide has a diameter of 30 μ

m or less and wherein the optical lens is arranged for reduction of divergence of the emitted laser light in a manner such that substantially low-loss coupling of the emitted laser light into the core of the optical waveguide is possible if the first end-portion of the optical waveguide is positioned within a distance of at least 100 μ

m from the optical lens.

23. The optical connection component of claim 22 wherein the optical waveguide is an optical fibre.

24. The optical connection component of claim 23 wherein the optical lens and the solid state laser component are monolithically integrated.

25. The optical connection component of claim 23 wherein the optical lens is positioned and arranged so that in use the emitted laser light is substantially collimated by the optical lens.

26. The optical connection component of claim 23 wherein the solid state laser is a vertical-cavity surface-emitting laser (VCSEL) and wherein the receiver is a resonant cavity enhanced photodiode (RCE-PD) and wherein the solid state laser comprises a distributed Bragg reflector (DBR) and the optical lens is formed on an exterior surface of the DBR.

27. The optical connection component of claim 23 wherein the optical connection component comprises a first and a second mechanical connection element, the first mechanical connection element being arranged for holding the first end-portion of the optical fibre in first predetermined position relative to the first mechanical connection element and the second mechanical connection element being arranged for holding a second end-portion of the optical fibre in second predetermined position relative to the second mechanical connection element,

wherein the first predetermined position is selected so that light can be coupled from the solid state laser component into the core of the optical fibre without substantial coupling losses and the second predetermined position is selected so that light can be coupled from the core of the optical fibre into the receivers without substantial coupling losses.