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IEE Proceedings - Optoelectronics

Issue 6 • Dec 1999

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Displaying Results 1 - 5 of 5
  • Facet coating effects on 1.3 and 1.55 μm strained multiple-quantum-well AlGaInAs/InP laser diodes

    Publication Year: 1999, Page(s):268 - 272
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (208 KB)

    The authors investigate the influence of facet reflectivity on the threshold current, light output power, characteristic temperature and slope efficiency drop for 1.3 and 1.55 μm strained multiple-quantum-well AlGaInAs-InP laser diodes (LDs) grown by low-pressure metalorganic vapor phase epitaxy. Remarkable improvements in maximum operation temperature, threshold current, slope efficiency drop,... View full abstract»

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  • Adjustment of the chirp parameter of chirped fibre Bragg gratings

    Publication Year: 1999, Page(s):263 - 267
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    A method for accurately adjusting the chirp parameter of the fabricated chirped fibre Bragg gratings (CFBGs) is demonstrated experimentally By establishing different strain gradient with proper profiles along the length of CFBGs, one can not only increase or decrease the chirp of the CFBG, but also change the sign of the chirp without exchanging the two ends of the grating. The variance of the chi... View full abstract»

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  • Experimental investigation of a Q-switched triple contact InGaAs bow-tie diode laser

    Publication Year: 1999, Page(s):259 - 262
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (144 KB)

    In this study the authors investigate high-energy picosecond pulse generation in a three contact two quantum well (QW) p-doped InGaAs bow-tie diode laser using a passive Q switching technique. Picosecond duration pulses with pulse energies of 39 pJ and peak powers in excess of 700 mW are obtained from the device in a well defined single lobed far-field. The pulses have typically 45 to 55 ps durati... View full abstract»

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  • Analysing distributed feedback waveguides

    Publication Year: 1999, Page(s):253 - 258
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (220 KB)

    A method for analysing distributed feedback waveguides with arbitrary refractive index profiles is reported. The method considers a waveguide as a number of segments within which the reflection is weak, and thus the relevant transmission loss and multiple reflections can be neglected. By introducing a concept of reflective density formulas are derived for calculating the reflection and transmissio... View full abstract»

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  • Temperature dependence of the spontaneous emission factor in VCSELs

    Publication Year: 1999, Page(s):245 - 251
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    The spontaneous emission factor β is studied as a function of temperature using k-, no k- and partial k-selection for bulk and multiquantum-well vertical-cavity surface-emitting lasers (VCSELs). This gives an improved insight into the behaviour of spontaneous emission as a function of temperature in such lasers where the resonant wavelength is chosen by the cavity and does not necessarily fol... View full abstract»

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