Laser warning receiver to identify the wavelength and angle of arrival of incident laser light
| DWPI Title: Laser warning receiver for detecting laser sources, has optical sources that are oriented to receive laser light at angle of arrival and to direct laser light onto multi-wavelength photodetector |
| Abstract: A laser warning receiver is disclosed which has up to hundreds of individual optical channels each optically oriented to receive laser light from a different angle of arrival. Each optical channel has an optical wedge to define the angle of arrival, and a lens to focus the laser light onto a multi-wavelength photodetector for that channel. Each multi-wavelength photodetector has a number of semiconductor layers which are located in a multi-dielectric stack that concentrates the laser light into one of the semiconductor layers according to wavelength. An electrical signal from the multi-wavelength photodetector can be processed to determine both the angle of arrival and the wavelength of the laser light. |
| Use: Laser warning receiver for detecting laser sources, used in aircraft cockpit. |
| Advantage: The threat to the munitions and laser guided missile and disable of satellite borne imaging system can be identified easily by determining the angle of arrival and wavelength of the laser light. |
| Novelty: The laser warning receiver (10) has several optical channels (12) each comprises optical sources such as a lens (14), a stepped light baffle (20) and an optical wedge (16). The optical sources are oriented to receive laser light (100) at an angle of arrival and to direct the laser light onto a multi-wavelength photodetector (18). The angle of arrival of laser light is different for every optical channel. The angle of arrival and wavelength of the laser light are identified using the optical sources and multi-wavelength photodetector. |
| Filed: 4/24/2008 |
| Application Number: US2008108635A |
| Tech ID: SD 10796.0 |
| 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. |
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