1.1-W continuous-wave 1480-nm semiconductor lasers with distributed electrodes for mode shaping

Salet, P.; Gerard, F.; Fillion, T.; Pinquier, A.; Gentner, J.L.; Delepine, S.; Doussière, P.

doi:10.1109/68.730476

Cited by 25 publications

(7 citation statements)

References 6 publications

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“…(x, YZ'f(Y z)exp(i(kz_ar))+Pb(yz)exp(_i(kz+ax))] (2) where q and correspond to the forward and backward waves respectively, k is the propagation constant, and x,y,z) is the fundamental transverse (x-direction) mode guided by the epitaxial structure that weakly depends on y and z. Considering a single mode at the optical frequency o. , we can write the cavity field E as: E =!…”

Section: Paraxial Wave Equationmentioning

confidence: 99%

Modeling of the performance of high-brightness tapered lasers

et al. 2000

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A comprehensive model has been developed to study the operating characteristics of high-power high-brightness lasers consisting of a ridge-waveguide section coupled to a tapered region. The model, based on the Beam Propagation Method (BPM), includes a non-linear gain coefficient, current spreading due to junction voltage, and thermal effects taking into account for the first time to our knowledge a longitudinal gradient in the device temperature. We first demonstrate that during operation unwanted radiation that does not couple into the lateral mode of the waveguide, systematically propagates into the tapered region, and leads to the deterioration of the beam quality. To deflect and scatter this radiation, the use of specific cavity-spoiling elements, consisting of grooves etched down through the active region, appears necessary. We also study the role of the ridge section length in the operation of the device. A long ridge-waveguide region, providing both a well defined fundamental mode in the ridge-waveguide, and a gain saturation in the tapered region, improves the beam stability, but can lead, on the other hand, to optical self-focusing. Thermal effects are also investigated. We show how thermal lensing induces a lateral quadratic phase curvature and therefore alters the astigmatism of the device.

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Section: Paraxial Wave Equationmentioning

confidence: 99%

Modeling of the performance of high-brightness tapered lasers

et al. 2000

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“…instabilities, as has been demonstrated in work carried out on tapered structures including master oscillators-power amplifiers (Donnelly et al 1998;Selmic et al 2002), cavity spoiling features (Donnelly et al 1998;Selmic et al 2002), laterally profiled facets Stryckman et al (1996), patterned contacts Salet et al (1998), unstable resonators Tilton et al (1991), and angled DFB structures Lang et al (1998). However, these techniques largely rely on the use of low-fabrication-tolerance elements reducing the yields, so alternative designs for stable high-power lasers attract considerable interest, with selective quantum well intermixing proposed as an attractive method Kowalski (2005).…”

mentioning

confidence: 91%

Generalised multiple-lateral-mode rate equation modelling of lasers with selective quantum-well intermixing for improved beam quality

Russell

Avrutin

Yanson³

2008

Opt Quant Electron

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A numerical model in terms of rate equations for lateral mode amplitudes for analysing static and dynamic properties of moderately broad stripe (tens of microns) laser diodes is proposed and used for modeling lasers with longitudinally or laterally intermixed passive areas. Introduction of passive diffractive regions is shown to offer some improvement of the laser beam, and the potential of further improvement of the beam by Intermixing lateral fringes along the stripe is discussed.

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“…These include angled grating distributed feedback ͑␣DFB͒ lasers, 5 antiresonant reflecting optical waveguide ͑ARROW͒ lasers, 6 integrated postamplifiers, 7 phase-locked arrays, 8 profiled reflectivity facets, 9 distributed electrodes, 10 and unstable resonators. 11 Considering the different experiments carried out and the availability of published results, limited comparison can be made.…”

Section: Introductionmentioning

confidence: 99%

Tapered waveguide with parabolic lens: theory and experiment

et al. 2003

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Theoretical and experimental work to integrate parabolic intracavity lens into a high-power tapered ridge-waveguide semiconductor laser diode is carried out. A finite difference beam propagation model is used to simulate the laser operation with and without the lens. Focused ion-beam etching is used to integrate the lens with the laser cavity. The lens is designed to compensate for the phase curvature of the incident mode on the output facet. This leads to improved linearity in the lightcurrent characteristics of the device, showing an increase of up to 47% in power slope efficiency, 2-m broadening in near field pattern, and 1-deg narrowing in the far-field pattern.Subject terms: semiconductor laser diode; tapered waveguide; parabolic lens; finite difference beam propagation method; focused ion-beam etching.

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1.1-W continuous-wave 1480-nm semiconductor lasers with distributed electrodes for mode shaping

Cited by 25 publications

References 6 publications

Modeling of the performance of high-brightness tapered lasers

Modeling of the performance of high-brightness tapered lasers

Generalised multiple-lateral-mode rate equation modelling of lasers with selective quantum-well intermixing for improved beam quality

Tapered waveguide with parabolic lens: theory and experiment

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