Retrocommunication utilizing electroabsorption modulators and non-mechanical beam steering
2005 (English)In: Optical Engineering: The Journal of SPIE, ISSN 0091-3286, Vol. 44, no 4, 045001- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2005. Vol. 44, no 4, 045001- p.
IdentifiersURN: urn:nbn:se:uu:diva-92442DOI: 10.1117/1.1883063OAI: oai:DiVA.org:uu-92442DiVA: diva2:165519