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Sökning: WFRF:(Agren B) > (2000-2004) > Wide-aperture GaAs/...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003342naa a2200409 4500
001oai:DiVA.org:liu-46824
003SwePub
008091011s2002 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-468242 URI
0247 a https://doi.org/10.1117/12.4701772 DOI
040 a (SwePub)liu
041 a engb eng
042 9 SwePub
072 7a vet2 swepub-contenttype
072 7a kon2 swepub-publicationtype
1001 a Wang, Q.u Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Sweden4 aut
2451 0a Wide-aperture GaAs/AlGaAs multiple quantum well electro-optic modulators
264 1b SPIE,c 2002
338 a print2 rdacarrier
520 a We present design and fabrication methods for surface normal monolithic amplitude modulators with an aperture up to 14 × 14 mm2, a contrast ratio of 6:1 and for low driving voltages (=8 V). The modulators consist of undoped GaAs/AlGaAs quantum wells embedded in a Fabry-Perot (FP) resonance cavity grown by MOVPE. To improve the device performance the FP cavity, the period and thickness of the quantum well and doping concentration were optimised. Also, the dimension of the modulator were varied from 0.5 × 0.5 to 14 × 14 mm2. The results show that the yield of the modulators increases significantly when decreasing the size of the modulators. To remedy the low yield issue for wide aperture modulator, a pixelated approach was used to divide the mono pixel in a monolithic modulator into several pixels, for example from 4 to 48. The modulation speed of the modulators with different dimensions was characterised by electro-optic (EO) response measurements. The temporal optical response of the large modulators was satisfactory up to the order of MHz modulation frequency where the RC constant limited the performance. A few of the modulators with wide apertures are to be assembled into an optical link system for free-space communication.
653 a Electro-optic modulator
653 a Free-space optical communication
653 a GaAs/AlGaAs quantum wells
653 a NATURAL SCIENCES
653 a NATURVETENSKAP
7001 a Junique, S.u Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Sweden4 aut
7001 a Agren, D.u Ågren, D., Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Sweden4 aut
7001 a Noharet, B.u Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Sweden4 aut
7001 a Malm, H.u Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Sweden4 aut
7001 a Borglind, J.u Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Sweden4 aut
7001 a Andersson, J.u Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Sweden4 aut
7001 a Sjoqvist, L.4 aut
7001 a Ohgren, J.4 aut
7102 a Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Swedenb Ågren, D., Optical Engineering Department, Acreo AB, Electrum 236, 164 40 Kista, Sweden4 org
7730 t Proceedings of SPIE, the International Society for Optical Engineeringd : SPIEg 4947, s. 59-67q 4947<59-67x 0277-786Xx 1996-756X
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-46824
8564 8u https://doi.org/10.1117/12.470177

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