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Sökning: WFRF:(Morthier G.)

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1.
  • Buffolo, M., et al. (författare)
  • Modeling of the Optical and Electrical Degradation of 845 nm VCSILs
  • 2023
  • Ingår i: 2023 Conference on Lasers and Electro-Optics, CLEO 2023.
  • Konferensbidrag (refereegranskat)abstract
    • Optical and electrical degradation of novel micro-transfer-printed VCSILs is investigated. Modeling of experimental data suggests that the main degradation mechanism is represented by the relocation of impurities, originating from the p-side, toward the active region.
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4.
  • Morthier, G., et al. (författare)
  • Extended modulation bandwidth of DBR and external cavity lasers by utilizing a cavity resonance for equalization
  • 2000
  • Ingår i: IEEE Journal of Quantum Electronics. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9197 .- 1558-1713. ; 36:12, s. 1468-1475
  • Tidskriftsartikel (refereegranskat)abstract
    • We have investigated the occurence of a second resonance frequency in distributed Bragg reflector laser diodes and the high modulation bandwidth resulting from it. The influence of different laser parameters has been theoretically investigated. It is also shown that a similar behavior can be obtained in laser diodes with a passive, low-loss, and gratingless external cavity, The possibilities of large-signal digital modulation are also investigated.
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5.
  • Morthier, G., et al. (författare)
  • Extraction of a large set of laser parameters from different measurements
  • 1996
  • Ingår i: Semiconductor Laser Conference, 1996., 15th IEEE International. ; , s. 175-176
  • Konferensbidrag (refereegranskat)abstract
    • We show how most of the parameters of a DFB laser can be extracted from a limited number of relatively simple measurements. These measurements include the ASE spectra at different currents below threshold, the RIN spectra above threshold and the P-I relation. We have performed curve-fitting on different characteristics such as the ASE spectrum, the RIN spectrum and the P-I curve. From the ASE spectrum measured in the vicinity of the lasing wavelength we can extract grating parameters, facet phases, refractive index and gain as well as the wavelength and current dependence of the last two parameters
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