Optical XOR gate
| DWPI Title: Photonic integrated circuit (PIC) for generating exclusive OR (XOR) function digital optical output, has detector which generates light portion which changes reverse-bias voltage on modulator to generate inverted AND function output |
| Abstract: An optical XOR gate is formed as a photonic integrated circuit (PIC) from two sets of optical waveguide devices on a substrate, with each set of the optical waveguide devices including an electroabsorption modulator electrically connected in series with a waveguide photodetector. The optical XOR gate utilizes two digital optical inputs to generate an XOR function digital optical output. The optical XOR gate can be formed from III-V compound semiconductor layers which are epitaxially deposited on a III-V compound semiconductor substrate, and operates at a wavelength in the range of 0.8-2.0 mum. |
| Use: PIC for generating XOR function digital optical output. |
| Advantage: The digital signal processing in the optical domain ca provide higher signal bandwidth, lower signal cross-talk, and greater protection against electronic eavesdropping. The optical signal processing eliminates the need to convert signals from the optical domain into the electronic domain for processing and then to re-convert the processed signals from the electronic domain back into the optical domain. The optical signal processing can reduce the cost, electrical power requirement, size and weight. |
| Novelty: The PIC has electroabsorption modulator (14,18) and photo detector (16,20) which are electrically connected in series, with modulator receiving third light portion split out from digital optical input (110,120) by optical waveguide splitter (22). The photo detector generates fourth light portion another photo detector signal which changes reverse-bias voltage on modulator to generate inverted AND function output from third light portion. An optical combiner combines inverted AND function outputs to form XOR function digital optical output (130). |
| Filed: 12/20/2010 |
| Application Number: US2010973470A |
| Tech ID: SD 11619.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |