Nonlinear properties of tapered laser cavities

Sujecki, S.; Borruel, L.; Wykes, J.; Moreno, P.; Sumpf, B.; Sewell, P.; Wenzel, H.; Benson, T.M.; Erbert, G.; Esquivias, I.; Larkins, E.C.

doi:10.1109/jstqe.2003.818843

Cited by 59 publications

(40 citation statements)

References 41 publications

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“…Our initial quasi-3D model for tapered lasers has been reported in detail [5][6][7] , and therefore only basic features are described here. In brief, the complete steady state electrical, thermal, and optical equations for the tapered laser are solved self-consistently, assuming a single frequency.…”

Section: Description Of Model Basismentioning

confidence: 99%

“…Our original model [5][6][7] solves the electrical, thermal and optical equations in half-cavity (HC) to reduce the computational effort, thus assuming a symmetrical solution for the optical field and consequently symmetric solutions for the photon density, carrier density and temperature profiles. Although as initial optical field we usually launch into the rear facet the fundamental mode of the passive RW section, an even function, we have checked that the final optical field is independent of the shape of the initial field, provided it is an even function.…”

Section: Model Options Regarding Symmetrymentioning

confidence: 99%

“…*esquivia@tfo.upm.es; phone +34 91 3367339; fax +34 91 3367319; Our group at the Universidad Politécnica of Madrid, in collaboration with the University of Nottingham, has developed a sophisticated simulator for tapered lasers [5][6][7] , called CONAN, which solves the electrical, optical and thermal equations for these devices. Despite the assumptions needed to reduce the model complexity (steady state, single frequency, twodimensional propagation of the optical mode), the simulations have shown good qualitative and quantitative agreement with experimental results in tapered lasers with different geometries and based on different materials [6][7][8] . Furthermore, the simulator has demonstrated to be a useful tool to predict the behavior of novel designs prior to their fabrication [9][10] .…”

Section: Introductionmentioning

confidence: 99%

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Simulation of high brightness tapered lasers

Esquivias

Odriozola

Tijero

et al. 2010

Novel in-Plane Semiconductor Lasers IX

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Tapered semiconductor lasers have demonstrated both high power and good beam quality, and are of primary interest for those applications demanding high brightness optical sources. The complex non-linear interaction between the optical field and the active material requires accurate numerical simulations to improve the device design and to understand the underlying physics. In this work we present results on the design and simulation of tapered lasers by means of a Quasi-3D steady-state single-frequency model. The results are compared with experiments on Al-free active region devices emitting at 1060 nm. The performance of devices based on symmetric and asymmetric epitaxial designs is compared and the influence of the design on the beam properties is analyzed. The role of thermal effects on the beam properties is experimentally characterized and analyzed by means of the numerical simulations. Tapered lasers with separate electrical contacts in the straight and tapered sections, based on symmetrical and asymmetrical epitaxial designs are also presented and analyzed.

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Section: Description Of Model Basismentioning

confidence: 99%

Section: Model Options Regarding Symmetrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulation of high brightness tapered lasers

Esquivias

Odriozola

Tijero

et al. 2010

Novel in-Plane Semiconductor Lasers IX

Self Cite

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“…A previously developed model and simulation tool for multicontact tapered lasers [1][2] was slightly modified in order to consider a single pass amplifier instead of a resonant cavity. In brief, the program solves self-consistently the complete steady state electrical, thermal, and optical equations for a single-pass tapered amplifier, assuming a single frequency.…”

Section: Simulation Model and Device Descriptionmentioning

confidence: 99%

Analysis of the performance of tapered semiconductor optical amplifiers: role of the taper angle

et al. 2015

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“…However, the output power is limited by the small gain volume of the device. Tapered laser diodes [4][5][6][7][8][9] offer a solution that combines the advantages of the BA-lasers, in terms of the high-power output, with the good beam quality offered by the narrow-stripe RW lasers. For many applications, the tapered laser diodes are found to offer an economical solution because of their simplicity and compatibility with the current fabrication techniques [5,6].…”

Section: Introductionmentioning

confidence: 99%

Factors influencing brightness and beam quality of conventional and distributed Bragg reflector tapered laser diodes in absence of self‐heating

Kaunga-Nyirenda

Bull

Lim

et al. 2014

IET Optoelectronics

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk Abstract: In this study, the authors examine some of the factors affecting the brightness and the beam quality of high-power tapered lasers. The large volume resonators required to achieve a high-power, high-brightness operation make the beam quality sensitive to carrier lensing and a multimode operation. These cause bleaching of the regions outside the ridge waveguide. The beam quality in the conventional and the distributed Bragg reflector tapered lasers is examined in the absence of the self-heating effects to investigate the effect of the carrier lensing effects. The influence of the front facet reflectivity and the taper angle on the beam quality is investigated. The beam quality was found to degrade with an increase in the front facet reflectivity and for the larger taper angles in the conventional tapered lasers, especially at low ridge waveguide currents. Finally, the performance of the conventional tapered lasers employing a beamspoiler was assessed. The beam quality was found to be comparable with that achieved in the DBR tapered lasers.

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Nonlinear properties of tapered laser cavities

Cited by 59 publications

References 41 publications

Simulation of high brightness tapered lasers

Simulation of high brightness tapered lasers

Analysis of the performance of tapered semiconductor optical amplifiers: role of the taper angle

Factors influencing brightness and beam quality of conventional and distributed Bragg reflector tapered laser diodes in absence of self‐heating

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