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Sökning: swepub > Larsson Anders > Larsson Anders 1957 > Haglund Åsa 1976

  • Resultat 71-80 av 83
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71.
  • Westbergh, Petter, 1981, et al. (författare)
  • 40 Gbit/s error-free operation of oxide-confined 850 nm VCSEL
  • 2010
  • Ingår i: Electronics Letters. - : Institution of Engineering and Technology (IET). - 1350-911X .- 0013-5194. ; 46:14, s. 1014-1015
  • Tidskriftsartikel (refereegranskat)abstract
    • Error-free transmission is demonstrated at bit rates up to 40 Gbit/s in a back-to-back configuration and up to 35 Gbit/s over 100 m multimode fibre using a directly modulated oxide confined 850 nm vertical cavity surface emitting laser.
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72.
  • Westbergh, Petter, 1981, et al. (författare)
  • 850 nm VCSEL Operating Error-Free at 40 Gbit/s
  • 2010
  • Ingår i: Semiconductor Laser Conference (ISLC), 2010 22nd IEEE International. - 0899-9406. - 9781424456833 ; , s. 154 - 155
  • Konferensbidrag (refereegranskat)abstract
    • We report on speed enhancement of 850 nm oxide confined VCSELs by photon lifetime reduction and demonstrate a 23 GHz modulation bandwidth and error-free operation at 40 Gbit/s.
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73.
  • Westbergh, Petter, 1981, et al. (författare)
  • A high-speed laser for future data-communication links
  • 2009
  • Ingår i: SPIE Newsroom. - : SPIE-Intl Soc Optical Eng. - 1818-2259.
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Optimized designs significantly improve the transmission rate of standard short-wavelength light sources.
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74.
  • Westbergh, Petter, 1981, et al. (författare)
  • High speed large aperture 850 nm VCSELs
  • 2009
  • Ingår i: International Nano-Optoelectronics Workshop (iNOW).
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Error-free transmission over 50 m of OM3 fiber at 32 Gbit/s is demonstrated at a bias current density of 11 kA/cm2 using a large aperture 850 nm oxide-confined VCSEL optimized for high speed operation.
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75.
  • Westbergh, Petter, 1981, et al. (författare)
  • High speed, low current density 850 nm VCSELs
  • 2009
  • Ingår i: IEEE Journal of Selected Topics in Quantum Electronics. - 1558-4542 .- 1077-260X. ; 15:3, s. 694-703
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on the design, fabrication, and evaluation of large-aperture, oxide-confined 850 nm vertical cavity surface emitting lasers (VCSELs) with high modulation bandwidth at low current densities. We also compare the use of InGaAs and GaAs quantum wells (QWs) in the active region. Both VCSELs reach an output power of 9 mW at room temperature, with a thermal resistance of 1.9deg C/mW. The use of InGaAs QWs improves the high-speed performance and enables a small-signal modulation bandwidth of 20 GHz at 25degC and 15 GHz at 85degC. At a constant bias current density of only 11 kA/cm2, we generate open eyes under large-signal modulation at bit rates up to 25 Gbit/s at 85degC and 30 Gbit/s at 55degC.
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76.
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77.
  • Westbergh, Petter, 1981, et al. (författare)
  • Higher speed VCSELs by photon lifetime reduction
  • 2011
  • Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. - : SPIE. - 0277-786X .- 1996-756X. - 9780819484895 ; 7952
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • The impedance characteristics and the effects of photon lifetime reduction on the performance of high-speed 850 nm VCSELs are investigated. Through S 11 measurements and equivalent circuit modeling we show that the parasitic mesa capacitance can be significantly reduced by using multiple oxide layers. By performing a shallow surface etch (25 - 55 nm) on the fabricated VCSELs, we are able to reduce the photon lifetime by up to 80% and thereby significantly improve both static and dynamic properties of the VCSELs. By optimizing the photon lifetime we are able to enhance the 3dB modulation bandwidth of 7 μm oxide aperture VCSELs from 15 GHz to 23 GHz and finally demonstrate errorfree transmission at up to 40 Gbit/s.
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78.
  • Westbergh, Petter, 1981, et al. (författare)
  • Impact of Photon Lifetime on High-Speed VCSEL Performance
  • 2011
  • Ingår i: IEEE Journal of Selected Topics in Quantum Electronics. - 1558-4542 .- 1077-260X. ; 17:6, s. 1603-1613
  • Tidskriftsartikel (refereegranskat)abstract
    • We investigate the impact of reduced photon lifetime on the static and dynamic performance of high-speed, oxide-confined 850-nm vertical-cavity surface-emitting lasers (VCSELs). The photon lifetime is reduced by a shallow-surface etch that lowers the reflectivity of the top mirror. From an analysis of the dependence of slope efficiency on mirror loss (etch depth) and temperature, we deduce values for the internal quantum efficiency and the internal optical loss and their dependencies on temperature. From an analysis of the dependence of the small-signal-modulation response on photon lifetime (etch depth) and temperature, we deduce values for differential gain and gain compression, and their dependencies on photon lifetime and temperature. We find a tradeoff between high resonance frequency and low damping for speed enhancement, leading to an optimum photon lifetime close to 3 ps for this particular VCSEL design that enables a modulation bandwidth of 23 GHz and error-free transmission at 40 Gb/s.
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79.
  • Westbergh, Petter, 1981, et al. (författare)
  • Large aperture 850 nm VCSEL operating at 28 Gbit/s
  • 2008
  • Ingår i: Semiconductor Laser Conference, 2008. ISLC 2008. IEEE 21st International. - 9781424417827 ; , s. 7-8
  • Konferensbidrag (refereegranskat)abstract
    • We report on large aperture, oxide-confined VCSELs at 850 nm with modulation bandwidths in excess of 20 GHz and demonstrate large-signal modulation up to 28 Gbit/s at a bias current density of only 10 kA/cm2.
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80.
  • Westbergh, Petter, 1981, et al. (författare)
  • Large aperture 850 nm VCSELs operating at bit rates up to 25 Gbit/s
  • 2008
  • Ingår i: Electronics Letters. - 1350-911X .- 0013-5194. ; 44:15, s. 907-908
  • Tidskriftsartikel (refereegranskat)abstract
    • Small signal modulation bandwidths in excess of 20 GHz are demonstrated for a 9 μm oxide aperture VCSEL emitting at 850 nm. Open eye diagrams are obtained under large signal modulation at bit rates up to 25 Gbit/s with a bias current density of only 10 kA/cm2.
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  • Resultat 71-80 av 83
Typ av publikation
konferensbidrag (48)
tidskriftsartikel (35)
Typ av innehåll
refereegranskat (68)
övrigt vetenskapligt/konstnärligt (15)
Författare/redaktör
Gustavsson, Johan, 1 ... (76)
Westbergh, Petter, 1 ... (54)
Kögel, Benjamin, 197 ... (26)
Haglund, Erik, 1985 (23)
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Bengtsson, Jörgen, 1 ... (22)
Modh, Peter, 1968 (10)
Szczerba, Krzysztof, ... (8)
Debernardi, P. (8)
Karlsson, Magnus, 19 ... (6)
Andrekson, Peter, 19 ... (6)
Jedrasik, Piotr, 195 ... (6)
Safaisini, Rashid, 1 ... (6)
Joel, A. (5)
Fattal, David (5)
Sorin, W. V. (5)
Wang, Shu Min, 1963 (4)
Sadeghi, Mahdad, 196 ... (4)
Amann, M. C. (4)
Vukusic, Josip, 1972 (4)
Agrell, Erik, 1965 (3)
Stattin, Martin, 198 ... (3)
Zhao Ternehäll, Huan ... (3)
Baveja, P. P. (3)
Gierl, Christian (3)
Meissner, Peter (3)
Hopfer, Friedhelm (3)
Bimberg, Dieter (3)
O'Reilly, E. P. (3)
Haglund, Emanuel, 19 ... (3)
Tan, Michael (3)
Sun, Jie, 1977 (2)
Adolfsson, Göran, 19 ... (2)
Yurgens, Avgust, 195 ... (2)
Olsson, Bengt-Erik, ... (2)
White, I. H. (2)
Maywar, D. N. (2)
Agrawal, G. P. (2)
Bimberg, D. (2)
Carlsson, Christina, ... (2)
Davani, Hooman A. (2)
Grasse, Christian (2)
Zogal, Karolina (2)
Gründl, Tobias (2)
Küppers, F. (2)
Ortsiefer, M. (2)
Fiol, Gerrit (2)
Healy, S. B. (2)
Söderberg, Emma, 198 ... (2)
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Lärosäte
Chalmers tekniska högskola (83)
Linköpings universitet (1)
Språk
Engelska (83)
Forskningsämne (UKÄ/SCB)
Teknik (71)
Naturvetenskap (20)

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