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Sökning: (WFRF:(Gustavsson Johan 1974 )) srt2:(2005-2009) > (2006)

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  • Modh, Peter, 1968, et al. (författare)
  • Linear Cascade VCSEL Arrays With High Differential Efficiency and Low Differential Resistance
  • 2006
  • Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 18:1, s. 100-102
  • Tidskriftsartikel (refereegranskat)abstract
    • We have fabricated monolithic linear cascade ver- tical-cavity surface-emitting laser (VCSEL) arrays intended for low loss fiber-optic radio-frequency links. Arrays with up to four VCSELs connected in series, with a spacing of 250 m, were fab- ricated on an insulating substrate. A thick layer of BCB was used to facilitate series connection through contact metallization and enable high frequency operation. The threshold current is 0.6 mA, independent of the number of VCSELs in the array. Differential efficiency, maximum output power, voltage, and differential re- sistance scale linearly with the number of VCSELs. For a four VCSEL array, we achieve a high differential efficiency of 160%, a maximum output power of 24 mW, and a low differential resis- tance of 220 . Basic link measurements, using a series connected VCSEL array, a parallel fiber ribbon, and a parallel connected detector array revealed a differential current gain exceeding unity in the low frequency limit.
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  • Persson, K. A., et al. (författare)
  • WCDMA radio-over-fibre transmission experiment using singlemode VCSEL and multimode fibre
  • 2006
  • Ingår i: Electronics Letters. - : Institution of Engineering and Technology (IET). - 1350-911X .- 0013-5194. ; 42:6, s. 372-374
  • Tidskriftsartikel (refereegranskat)abstract
    • A high-performance singlemode VCSEL developed for analogue applications has been evaluated for use in a radio-over-fibre link for WCDMA in-building distributed antenna systems. The experiment showed penalty-free transmission over a wide range of input RF powers. The ACLR limited the downlink input RF power to less than -13dBm.
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  • Resultat 1-10 av 14

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