منابع مشابه
effects of facet phases and reflectivity on the internal optical field in qws-dfb semiconductor lasers
in this paper, the effects of reflected waves of the facets on the internal optical intensity of semiconductor dfb lasers are investigated. the uniformity of optical intensity along the cavity length is evaluated with flatness parameter. the dependence of this parameter on coupling coefficient, reflectivity and grating phase at the facets is also studied. this investigation shows that in some s...
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High-coupling (KL = 3.0) phase-shifted DFB lasers are studied using a transmission-line laser model (TLLM), which includes spatial hole burning (SHB), the material gain spectrum, refractive index dependence on carrier concentration, and random spontaneous emission. Good agreement for CW spectra is shown with other models and experimental results. Dynamic simulations of laser transients show SHB...
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The fabrication and characterization of continuously tunable, solution-processed distributed feedback (DFB) lasers in the visible regime is reported. Continuous thin film thickness gradients were achieved by means of horizontal dipping of several conjugated polymer and blended small molecule solutions on cm-scale surface gratings of different periods. We report optically pumped continuously tun...
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Comprehensive numerical simulations with the transmission-line laser model (TLLM) are used to compare the behavior of gain-coupled DFB lasers with index-coupled DFB lasers fabricated from identical materials. These simulations compare slope efficiency, threshold current, spectra, smallsignal modulation bandwidth, maximum-intrinsic modulation bandwidth, large-signal transient response and chirp,...
متن کاملTheoretical analysis of optical injection locking in semiconductor DFB lasers, influence of the injection direction
Theoretical results concerning injection locking in complex cavity semiconductor lasers are reported. A general equation for the complex temporal envelope of the optical field is derived. The injection direction influence is taken into account and the difference between front and rear phase noise is pointed out and demonstrated. Numerical results are given concerning the feed-in rate of differe...
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ژورنال
عنوان ژورنال: The Review of Laser Engineering
سال: 1975
ISSN: 0387-0200,1349-6603
DOI: 10.2184/lsj.3.110