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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Foshee, J. Suning Tang Yuanji Tang Baofeng Duan Hartwick, T.S. |
| Copyright Year | 2007 |
| Description | Author affiliation: AFRL, Wright-Patterson AFB (Foshee, J.) |
| Abstract | This paper provides research progress in the development of fast electro-optic gratings for laser beam attenuations and in free space optical (FSO) communications involving mobile terminals. The electro-optic phase grating is formed by the phase separation of -100 nm liquid crystals droplets from a polymerizing organic matrix using holographic interference technique. The formed grating separates the incident laser beam into the output beams: the transmitted and diffracted beam, whose intensities can be electrically adjusted through electro-optic effect. The fast electro-optic gratings have a very fast electro-optic response time of 50 mus with diffraction efficiency above 99.8%. Optical receivers used in FSO have a limited dynamic range and there is a need for in-line variable attenuators to keep the signal levels from overloading the receiver. These attenuators should be continuous, provide sufficient attenuation, and also provide a low insertion loss for weak signal reception. The use of electro-optic phase gratings is one solution to meet the requirements for an in-line attenuator for FSO. |
| Starting Page | 1 |
| Ending Page | 10 |
| File Size | 8975386 |
| Page Count | 10 |
| File Format | |
| ISBN | 1424405246 |
| ISSN | 1095323X |
| DOI | 10.1109/AERO.2007.353013 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-03-03 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Lasers and electrooptics Laser beams Optical attenuators Optical receivers Holography Liquid crystal polymers Diffraction gratings Optical diffraction Holographic optical components Optical polymers |
| Content Type | Text |
| Resource Type | Article |
| Subject | Aerospace Engineering Space and Planetary Science |
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