Retrocommunication utilizing electroabsorption modulators and nonmechanical beam steering -: art. no. 045001

被引:28
作者
Hällstig, E
Ohgren, J
Allard, L
Sjöqvist, L
Engström, D
Hård, S
Agren, D
Junique, S
Wang, Q
Noharet, B
机构
[1] Swedish Def Res Agcy, Dept Laser Syst, SE-58111 Linkoping, Sweden
[2] Chalmers Univ Technol, Photon Lab, SE-41296 Gothenburg, Sweden
[3] Acreo AB, SE-16440 Kista, Sweden
关键词
free-space optical communication; multiple quantum wells; beam steering; spatial light modulator; tracking;
D O I
10.1117/1.1883063
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A novel retrocommunication link utilizing reflective multiple quantum well (MQW) optical modulators and nonmechanical beam steering and tracking is demonstrated. Large aperture reflective MOW modulators using AlGaAs/GaAs are optimized and manufactured. The modulators exhibit a contrast ratio larger than 4:1 and a modulation bandwidth of 10 MHz. Nonmechanical beam steering and tracking are studied using nematic liquid crystal (NLC) spatial light modulators (SLMs). The communication link is comprised of a retromodulating array with four MOW modulators and a transceiver using a NLC SLM for beam steering and tracking. Transfer of audio, real-time image data and pseudorandom bit sequences over 100-m range while tracking the moving retromodulator is shown. The link is capable of transferring data at approximately 8 Mbps. (c) 2005 Society of Photo-Optical Instrumentation Engineers.
引用
收藏
页码:1 / 8
页数:8
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