MULTIPLEXING HIGH SPEED LIGHT EMITTING DIODES (LEDs)

• US 20090034977A1
• Filed: 07/30/2007
• Published: 02/05/2009
• Est. Priority Date: 07/30/2007
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Fiorentino, Marco, Tan, Michael Renne Ty, Wang, Shih-Yuan, Bratkovski, Alexandre M., Beausoleil, Raymond G.
• Application Number:
  US11/830,618
• Publication Number:
  US 20090034977A1
• Time in Patent Office: Days
• US Class Current: 398/82
• CPC Class Codes: H01L 33/025 Physical imperfections, e.g. particular concentration or distribution of impurities
• CPC Class Codes: H01L 33/06 within the light emitting region, e.g. quantum confinement structure or tunnel barrier
• CPC Class Codes: H01L 33/22 Roughened surfaces, e.g. at the interface between epitaxial layers
• CPC Class Codes: H04J 14/02 Wavelength-division multiplex systems

Abstract

A system for multiplexing a plurality of high speed light emitting diodes (HSLEDs) includes a plurality of HSLEDs. Each of the plurality of HSLEDs emits a wavelength of light at a speed greater than or equal to about 1 Gigabyte per second. A multiplexer receives the wavelengths of light from the plurality of HSLEDs and combines the wavelengths of light for transmission over a channel. A method of multiplexing the plurality of HSLEDs is also disclosed.

Claims

1. A system for multiplexing a plurality of high speed light emitting diodes (HSLEDs) comprising:

the plurality of HSLEDs, wherein each of the plurality of HSLEDs emits a wavelength of light at a speed greater than or equal to about 1 Gigabyte per second; and

a multiplexer which receives the wavelengths of light from the plurality of HSLEDs and combines the wavelengths of light for transmission over a channel.

2. The system of claim 1, wherein the channel is at least one selected from free space and a waveguide configured to propagate the combined wavelengths of light.

3. The system of claim 1, further comprising:

a demultiplexer which separates the combined wavelengths of light into the wavelengths emitted by the plurality of HSLEDs.

4. The system of claim 3, further comprising:

at least one receiver for receiving the separated wavelengths of light.

5. The system of claim 1, wherein the multiplexer includes at least one dichroic mirror.

6. The system of claim 1, wherein the plurality of HSLEDs are configured to emit different wavelengths of light from the demultiplexer.

7. The system of claim 1, further comprising:

a current generator operable to electrically bias the plurality of HSLEDs to spontaneously generate light in an active layer of the plurality of HSLEDs upon a movement of carriers into the active layer.

8. The system of claim 1, wherein at least one of the HSLEDs comprises:

an active layer having a plurality of modulation-doped layers and a plurality of quantum wells arranged in an alternating configuration.

9. The system of claim 1, wherein at least one of the HSLEDs comprises:

a texturized surface at an interface of the active layer and either a p-type layer or an n-type layer.

10. A method of multiplexing a plurality of high speed light emitting diodes (HSLEDs) comprising:

receiving a plurality of inputs from the plurality of HSLEDs, wherein each of the plurality of inputs includes a wavelength of light emitted from the plurality of HSLEDs at a speed greater than or equal to about 1 Gigabyte per second;

combining the plurality of inputs for transmission over a channel; and

transmitting the plurality of combined inputs over the channel.

11. The method of claim 10, further comprising:

receiving the transmitted combined inputs at a demultiplexer; and

separating the combined inputs into the wavelengths of light emitted from the plurality of HSLEDs.

12. The method of claim 10, wherein receiving a plurality of inputs from the plurality of HSLEDs comprises:

receiving a plurality of different wavelengths of light from the plurality of HSLEDs.

13. The method of claim 10, wherein receiving a plurality of inputs from the plurality of HSLEDs comprises:

receiving the plurality of inputs at a multiplexer which includes at least one dichroic mirror.

14. The method of claim 10, further comprising:

electrically biasing the plurality of HSLEDs to spontaneously generate light in an active layer of the plurality of HSLED upon a movement of carriers into the active layer.

15. The method of claim 10, wherein at least one of the plurality of HSLEDs comprises an active layer having a plurality of modulation-doped layers and a plurality of quantum wells arranged in an alternating configuration.

16. The method of claim 10, wherein at least one of the plurality of HSLEDs comprises a texturized surface at an interface of an active layer and either a p-type layer or an n-type layer.

17. The method of claim 10, wherein the channel includes at least one selected from a waveguide and free space.

18. An interface for transmitting a plurality of wavelengths of light generated from a plurality of high speed light emitting diodes (HSLEDs) comprising:

the plurality of HSLEDs, wherein each of the plurality of HSLEDs is configured to emit the wavelengths of light at a speed greater than or equal to about 1 Gigabyte per second;

means for combining the wavelengths of light emitted from the plurality of HSLEDs; and

a channel configured to facilitate the transmission of the combined wavelengths of light.

19. The system of claim 18, wherein at least one of the plurality of HSLEDs comprises an active layer having plurality of modulation-doped layers and a plurality of quantum wells arranged in an alternating configuration.

20. The system of claim 18, wherein at least one of the plurality of HSLEDs comprises a texturized surface at an interface of an active layer and either a p-type layer or an n-type layer.