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Träfflista för sökning "WFRF:(Karlsson Magnus 1967 ) ;pers:(Andrekson Peter 1960);pers:(Larsson Anders 1957)"

Sökning: WFRF:(Karlsson Magnus 1967 ) > Andrekson Peter 1960 > Larsson Anders 1957

  • Resultat 1-10 av 13
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1.
  • Gustavsson, Johan S., 1974-, et al. (författare)
  • High-speed 850-nm VCSELs for 40 Gb/s transmission
  • 2010
  • Ingår i: Proceedings of SPIE - The International Society for Optical Engineering ; Semiconductor Lasers and Laser Dynamics IV; Brussels; 12 April 2010 through 16 April 2010. - 0277786X. - 978-081948193-1 ; 7720
  • Konferensbidrag (övrigt vetenskapligt)
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2.
  • Larsson, Anders, 1957-, et al. (författare)
  • High speed VCSELs for optical interconnects
  • 2012
  • Ingår i: Proc. 24th International Conference on Indium Phosphide and Related Materials. - 1092-8669. - 978-146731725-2
  • Konferensbidrag (refereegranskat)abstract
    • This paper presents an overview of our recent work on high speed, oxide confined, 850 nm vertical cavity surface emitting lasers (VCSELs). With proper active region and cavity designs, and techniques for reducing capacitance and thermal impedance, we have reached a modulation bandwidth of 23 GHz and demonstrated 40 Gbps transmission. Using an integrated mode filter for reducing the spectral width we have extended the reach on multimode fiber at 25 Gbps from 100 to 500 m. Improved link capacity was also demonstrated using a more spectrally efficient multi-level modulation format (4-PAM). Finally, a MEMS-technology for wafer scale integration of tunable high speed VCSELs was developed, enabling a tuning range of 24 nm, a 6 GHz modulation bandwidth, and 5 Gbps transmission.
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3.
  • Safaisini, Rashid, et al. (författare)
  • High-Speed 850 nm Quasi-Single Mode VCSELs for Extended Reach Optical Interconnects
  • 2013
  • Ingår i: Journal of Optical Communications and Networking. - 1943-0620. ; 5:7, s. 686-695
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper presents recent results on high-speed, quasi-single-mode, 850 nm vertical-cavity surface-emitting lasers (VCSELs) with a narrow spectral width for extended-reach optical interconnects. The top mirror reflectivity is adjusted for high output power, slope efficiency, and small signal modulation bandwidth. An oxide confined VCSEL with an ∼3  μm aperture diameter delivers 2 mW of output power and reaches a resonance frequency as high as 25 GHz and a modulation bandwidth exceeding 20 GHz. A small K-factor of 0.17 ns and a large D-factor of 17.3  GHz/mA1/2, extracted from the VCSEL modulation response, along with the improved DC and modal properties enable energy-efficient data transmission at high bit rates over long-distance multimode fiber. Error-free transmission at bit rates exceeding 20  Gbits/s over 1.1 km of OM4 fiber is demonstrated and shown to be limited mainly by the photoreceiver bandwidth. A theoretical investigation of the dependence of link performance on photoreceiver bandwidth is also presented.
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4.
  • Szczerba, Krzysztof, 1985-, et al. (författare)
  • 30 Gbps 4-PAM transmission over 200m of MMF using an 850 nm VCSEL
  • 2011
  • Ingår i: 2011 37th European Conference on Optical Communication (ECOC); 18-22 Sept. 2011; Geneva. - 978-1-4577-1918-9 ; s. 1-3
  • Konferensbidrag (refereegranskat)abstract
    • Real time, error free 4-PAM transmission at 25 Gbps and 30 Gbps over 300 m and 200m of multimode fiber, respectively, using a VCSEL operating at the wavelength of 850 nm.
5.
  • Szczerba, Krzysztof, 1985-, et al. (författare)
  • 30 Gbps 4-PAM transmission over 200m of MMF using an 850 nm VCSEL
  • 2011
  • Ingår i: Optics Express. - 1094-4087. ; 19:26, s. 203-208
  • Tidskriftsartikel (refereegranskat)abstract
    • We present high speed real time, error free 4-PAMtransmission for short range optical links based on a VCSEL operating at 850 nm, a multimode fibre and a simple intensity detector. Transmission speeds of 25 Gbps and 30 Gbps are demonstrated, and the maximum fibre reaches were 300 m and 200 m, respectively. The 4-PAM is also compared with OOK transmission at 25 Gbps, and we find that at this bit rate 4-PAM increases the error free transmission distance in the multimode fibre by 100 m, compared to OOK.
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8.
  • Szczerba, Krzysztof, 1985-, et al. (författare)
  • 4-PAM for high-speed short-range optical communications
  • 2012
  • Ingår i: Journal of Optical Communications and Networking. - 1943-0620. ; 4:11, s. 885-894
  • Tidskriftsartikel (refereegranskat)abstract
    • In this work, we compare 4-pulse amplitude modulation and on–off keying modulation formats at high speed for short-range optical communication systems. The transmission system comprised a directly modulated verticalcavity surface-emitting laser operating at a wavelength of 850 nm, an OM3Å multimode fiber link, and a photodetector detecting the intensity at the receiver end. The modulation formats were compared both at the same bit-rate and at the same symbol rate. The maximum bit-rate used was 25 Gbps. Propagation distances up to 600 m were investigated at 12.5 Gbps. All measurements were done in real time and without any equalization.
9.
  • Szczerba, Krzysztof, 1985-, et al. (författare)
  • 60 Gbits error-free 4-PAM operation with 850 nm VCSEL
  • 2013
  • Ingår i: Electronics Letters. - 0013-5194. ; 49:15, s. 953-955
  • Tidskriftsartikel (refereegranskat)abstract
    • 60 Gbits over 2 m, 50 Gbits over 50 m and 40 Gbits was transmitted over 100 m of OM4 multimode fibre using four-level pulse amplitude modulation and a directly modulated 850 nm vertical cavity surface emitting laser (VCSEL).
10.
  • Szczerba, Krzysztof, 1985-, et al. (författare)
  • Comparison of Intersymbol Interference Power Penalties for OOK and 4-PAM in Short-Range Optical Links
  • 2013
  • Ingår i: Journal of Lightwave Technology. - 0733-8724. ; 31:22, s. 3525-3534
  • Tidskriftsartikel (refereegranskat)abstract
    • We present results of experimental and theoretical investigations of intersymbol interference in 4-PAM transmission in short-range optical communications links based on the power penalty. A test link comprised of a directly modulated 850 nm VCSEL with up to 200 m of multimode fiber and direct detection was used. The link bandwidth was below 10 GHz and the maximum achieved data rate with 4-PAM was 44 Gbps over 100 m of fiber. In the same case and at similar sensitivity, only 32 Gbps could be achieved with OOK. If typical forward error correction could be applied, the sensitivity of the 4-PAM system was improved by up to 4 dB, reaching -10 dBm at 25 Gbps.
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  • Resultat 1-10 av 13
  • [1]2Nästa
 
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