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Träfflista för sökning "swepub ;pers:(Larsson Anders);pers:(Larsson Anders 1957);pers:(Haglund Åsa 1976);pers:(Amann M. C.)"

Sökning: swepub > Larsson Anders > Larsson Anders 1957 > Haglund Åsa 1976 > Amann M. C.

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1.
  • Davani, H. A., et al. (författare)
  • Polarization investigation of a tunable high-speed short-wavelength bulk-micromachined MEMS-VCSEL
  • 2012
  • Ingår i: Proceedings of SPIE - Conference on Vertical-Cavity Surface-Emitting Lasers XVI (VCSELs) / SPIE Photonics West Symposium, San Fransisco, 25-26 January 2012. - 0277-786X. - 9780819489197 ; 8276
  • Konferensbidrag (refereegranskat)abstract
    • We report the investigation of the state of polarization (SOP) of a tunable vertical-cavity surface-emitting laser (VCSEL) operating near 850 nm with a mode-hop free single-mode tuning range of about 12 nm and an amplitude modulation bandwidth of about 5 GHz. In addition, the effect of a sub-wavelength grating on the device and its influence on the polarization stability and polarization switching has been investigated. The VCSEL with an integrated sub-wavelength grating shows a stable SOP with a polarization mode suppression ratio (PMSR) more than 35 dB during the tuning.
2.
  • Gierl, C., et al. (författare)
  • Tuneable VCSEL aiming for the application in interconnects and short haul systems
  • 2011
  • Ingår i: Proceedings of SPIE - The International Society for Optical Engineering. Optical Metro Networks and Short-Haul Systems III; San Francisco, CA; 25-27 January 2011. - 0277-786X. - 978-081948496-3 ; 7959
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • Widely tunable vertical cavity surface emitting lasers (VCSEL) are of high interest for optical communications, gas spectroscopy and fiber-Bragg-grating measurements. In this paper we present tunable VCSEL operating at wavelength around 850 nm and 1550 nm with tuning ranges up to 20 nm and 76 nm respectively. The first versions of VCSEL operating at 1550 nm with 76 nm tuning range and an output power of 1.3mW were not designed for high speed modulation, but for applications where only stable continious tuning is essential (e.g. gas sensing). The next step was the design of non tunable VCSEL showing high speed modulation frequencies of 10 GHz with side mode supression ratios beyond 50 dB. The latest version of these devices show record output powers of 6.7mW at 20 °C and 3mW at 80 °C. The emphasis of our present and future work lies on the combination of both technologies. The tunable VCSEL operating in the 850 nm-region reaches a modulation bandwidth of 5.5GHz with an output power of 0.8mW.
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