Resources Contact Us Home
All-optical holographic code division multiple access switch

Image Number 13 for United States Patent #6844947.

A technique for processing optical input signals to produce optical output signals using only a single hologram for a plurality of circularly shifted code words used to encode the input signals. A spatial light modulator coupled to the each of the optical input signals encodes a corresponding one of the input optical signals, and the optical signals are linear combined for further processing. A matched filter composed of the single hologram receives the linear combination, and a two-dimensional microlens arrangement coupled to the matched filter emits each of the optical output signals from a corresponding microlens in the arrangement. Switching is engendered by controlling each spatial light modulator to thereby direct each input signal to the desired one of the microlens in the arrangement.

  Recently Added Patents
Vehicle grille
Method and system for using personal devices for authentication and service access at service outlets
Cis-alkoxy-substituted spirocyclic 1-H-pyrrolidine-2,4-dione derivatives
Piezoelectric quasi-resonance linear motors based on acoustic standing waves with combined resonator
Routing of data including multimedia between electronic devices
Method and structure of forming backside through silicon via connections
Auto-provisioning of network services over an Ethernet access link
  Randomly Featured Patents
Abrasion-resistant sliding material
Apparatus for separation and recovery of liquid and slurry abrasives used for polishing
Spray insulation shield apparatus and application method
Automatic routing and information system for telephone services
Ceiling fan blade
Step wave power converter
Rugged fluid flow and property microsensor
Spread spectrum communication system
Peptides of a melanoma antigen and their use in diagnostic, prophylactic, and therapeutic methods
Fixing device with condensed LED light