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Retrocommunication utilizing electroabsorption modulators and non-mechanical beam steering
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- Hällstig, Emil (author)
- Uppsala universitet,Kvantkemi
- Öhgren, Johan (author)
- Allard, Lars (author)
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- Sjöqvist, Lars (author)
- Engström, David (author)
- Hård, Sverker (author)
- Ågren, Daniel (author)
- Junique, Stephane (author)
- Wang, Qin (author)
- Noharet, Bertrand (author)
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- (creator_code:org_t)
- SPIE-Intl Soc Optical Eng, 2005
- 2005
- English.
- In: Optical Engineering. - : SPIE-Intl Soc Optical Eng. - 0091-3286 .- 1560-2303. ; 44:4, s. 045001-
- Journal article (peer-reviewed)
Abstract
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- A novel retrocommunication link utilizing reflective multiplequantum well (MQW) optical modulators and nonmechanical beamsteering and tracking is demonstrated. Large aperture reflective MQWmodulators using AlGaAs/GaAs are optimized and manufactured. Themodulators exhibit a contrast ratio larger than 4:1 and a modulationbandwidth of 10 MHz. Nonmechanical beam steering and tracking arestudied using nematic liquid crystal (NLC) spatial light modulators(SLMs). The communication link is comprised of a retromodulating arraywith four MQW modulators and a transceiver using a NLC SLM for beamsteering and tracking. Transfer of audio, real-time image data and pseudorandombit sequences over 100-m range while tracking the movingretromodulator is shown. The link is capable of transferring data at approximately8 Mbps.
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- Öhgren, Johan
- Allard, Lars
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- Engström, David
- Hård, Sverker
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- Ågren, Daniel
- Junique, Stephan ...
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