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Träfflista för sökning "WFRF:(Gustavsson Johan 1974 ) ;pers:(Andrekson Peter 1960);conttype:(refereed)"

Sökning: WFRF:(Gustavsson Johan 1974 ) > Andrekson Peter 1960 > Refereegranskat

  • Resultat 1-9 av 9
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1.
  • 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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  • Safaisini, Rashid, et al. (författare)
  • 22 Gb/s error-free data transmission beyond 1 km of multi-mode fiber using 850 nm VCSELs
  • 2013
  • Ingår i: Vertical-Cavity Surface-Emitting Lasers Xvii. - 0277-786X. - 978-0-8194-9408-5 ; 8639
  • Konferensbidrag (refereegranskat)abstract
    • The first error-free data transmission beyond 1 km of multi-mode fiber at bit-rates exceeding 20 Gb/s is demonstrated using a high modulation bandwidth, quasi-single mode (SMSR similar to 20 dB) 850 nm VCSEL. A VCSEL with small similar to 3 mu m aperture shows quasi-single mode operation with a narrow spectral width. The top mirror reflectivity of the VCSEL is optimized for high speed and high output power by shallow etching. A combination of narrow spectral width and high optical power reduces the effects of fiber dispersion and fiber and connector losses and enables such a long transmission distance at high bit-rates.
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4.
  • 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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5.
  • 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.
6.
  • 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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  • 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)
  • 4-PAM for high-speed short-range optical communications
  • 2012
  • Ingår i: Journal of Lightwave Technology. - 0733-8724.
  • Tidskriftsartikel (refereegranskat)abstract
    • In this work we compare 4-PAM and OOK modulation formats at high speed for short range optical communication systems. The transmission system comprises a directly modulated VCSEL operating at wavelength of 850 nm, an OM3+ multimode fibre link and a photodetector detecting the intensity at the receiver end. The modulation formats are 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.
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