Photonic data compression system and method

• US 5,479,164 A
• Filed: 05/05/1994
• Issued: 12/26/1995
• Est. Priority Date: 05/05/1994
• Status: Expired due to Fees

• Current Assignee: Ben Yorks, Yorks, Jason
• Original Assignee: Ben Yorks, Yorks, Jason
• Inventors: Yorks, Jason, Yorks, Ben
• Primary Examiner(s): Young, Brian K.
• Application Number:
  US08/238,677
• Time in Patent Office: 600 Days
• Field of Search: 341/50, 341/155, 341/144, 359/15, 385/8, 385/24, 385/49, 250/568
• US Class Current: 341/50
• CPC Class Codes: H04J 14/02 Wavelength-division multiplex systems
• CPC Class Codes: H04Q 11/0003 Details
• CPC Class Codes: H04Q 2011/0007 Construction
• CPC Class Codes: H04Q 2011/0022 using fibre gratings
• CPC Class Codes: H04Q 2011/0024 using space switching
• CPC Class Codes: H04Q 2011/0052 Interconnection of switches

Abstract

A photonic system for compressing and decompressing data using a hologram that converts a plurality of spatially modulated light beams into a single reference beam that has a wavelength unique to a bit string of data. The single reference beam is then converted into a plurality of spatially modulated light beams by a diffraction grating. The light beams are detected by a bank of photodetectors which convert the photonic energy into electrical signals that correspond to the originally transmitted bit string.

Claims

1. A photonic system for compressing a data bit string which has a plurality of data bits, comprising:

a light source that generates a first spatially modulated light beam which has a spatial address that corresponds to the data bits of the data bit string, said first spatially modulated light beam has a plurality of wavelengths;

a refractive element that reconstructs said first spatially modulated light beam to create a reference beam which has a wavelength that is unique to said spatial address of said first spatially modulated light beam;

a diffraction element that receives said reference beam and creates a second spatially modulated light beam which has a spatial address that corresponds to the data bit string; and

,

a photodetector which detects said second spatially modulated light beam.

2. The system as recited in claim 1, wherein said refractive element is a volume hologram.

3. The system as recited in claim 2, wherein said refractive element includes a hologram that emits said reference beam at an angle unique to said spatial address, and a filter that absorbs said wavelengths except said wavelength that is unique to said spatial address.

4. The system as recited in claim 1, wherein said light source is a plurality of light emitters.

5. The system as recited in claim 1, further comprising a first buffer that stores the data bits of the data bit string and is coupled to said light source.

6. The system as recited in claim 5, further comprising a second buffer that is coupled to said photodetector and stores the data bits of the data bit string.

7. The system as recited in claim 1, wherein said refractive element creates a reference beam with a first wavelength from a first spatial address of said first spatially modulated light beam, and creates a reference beam with a second wavelength from a second spatial address of said first spatially modulated light beam.

8. The system as recited in claim 1, further comprising an optical waveguide that couples said refractive element with said diffraction element.

9. A method for compressing a data bit string which has a plurality of data bits, comprising the steps of:

a) generating a first spatially modulated light beam which has a spatial address that corresponds to the data bits of the data bit string, said first spatially modulated light beam having a plurality of wavelengths;

b) reconstructing said first spatially modulated light beam to create a reference beam which has a wavelength that is unique to said spatial address of said first spatially modulated light beam;

c) transmitting said reference beam;

d) receiving said reference beam;

e) creating a second spatially modulated light beam from said reference beam, wherein said second spatially modulated light beam has a spatial address that corresponds to the data bits of the data bit string; and

,

f) detecting said second spatially modulated light beam.