Modeling electro-optical characteristics of broad area semiconductor lasers based on a quasi-stationary multimode analysis

Eckstein, Hans-Christoph; Zeitner, Uwe D.

doi:10.1364/oe.21.023231

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…In continuous wave operation it can be observed that the beam quality of the laser degrades at high current densities and temperatures [9]. This phenomenon could not be reproduced by our simulation model in [3], because it did not include the computation of the temperature distribution inside the laser. Therefore, we extended this model with a calculation of the heat sources from the optical simulation as described in section 3.…”

Section: Calculation Model Comprising Thermal Effectsmentioning

confidence: 92%

“…To optimize the lasers and to tailor the microstructures, it is necessary to have an efficient and accurate simulation model to compute the output power and beam quality of the device. In this work we present our latest improvements and enhancements of the simulation method we recently published in [3]. In particular, we show the implementation of a thermal analysis which allows to calculate the influence of the temperature distribution inside the waveguide.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation and optimization of microstructured high brightness broad area laser diodes

Eckstein

Zeitner

Tünnermann

et al. 2015

Novel in-Plane Semiconductor Lasers XIV

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The development of broad area laser diodes towards higher output power, efficiency and brightness is essential to gain progress in almost all laser applications because those devices provide the basis for high power laser sources. To systematically improve the characteristics of high power broad area laser diodes through a design process, it is necessary to have an accurate and efficient computation model self-consistently taking into account optical, electrical and thermal properties. In this publication we present numerical techniques to compute the optical properties of the multimode beam generated by high power AlGaAs broad area laser diodes with an operating wavelength of 970 nm. This simulation considers fluctuations of the carrier and power density as well as the temperature distribution. The numerical results show an excellent agreement to measured data of conventional and microstructured high power broad area lasers. The high computation speed of the model allows optimizing microstructures inside the laser resonator with the use of a genetic optimization algorithm. We show that this design approach potentially leads to a substantial performance gain of the device. In particular degradation of the beam quality due to thermal effects at high injection currents can be controlled

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Section: Calculation Model Comprising Thermal Effectsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Numerical simulation and optimization of microstructured high brightness broad area laser diodes

Eckstein

Zeitner

Tünnermann

et al. 2015

Novel in-Plane Semiconductor Lasers XIV

Self Cite

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“…In the latest simulations of such resonators [10], which consider mode competition and nonlinear effects of the gain medium, a similar intensity distribution as measured can be reconstructed numerically.…”

mentioning

confidence: 96%

“…In a future work we will present the possibility to design phase structures with a parameterized nonlinear optimization of the beam quality and efficiency. This optimization is based on the multimode analysis presented in [10]. …”

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confidence: 99%

Mode shaping in semiconductor broad area lasers by monolithically integrated phase structures

et al. 2013

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By broadening the stripe width of the active waveguide region, it is possible to extract high optical powers from semiconductor broad area lasers. However, a weak output beam quality, optical filamentation, and high peak power densities will result, which are invoked by the amplification of higher order modes. We show an approach to influence the optical field inside the resonator by integrating optical phase structures directly into the waveguide. Those elements offer the possibility to enlarge the active gain area for the desired fundamental laser mode, while additional diffraction losses for higher order modes are generated, thus achieving an improved beam quality. We report on considerations in designing those elements and demonstrate a first experimental realization.

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“…The large number of high-order lateral modes deteriorates the lateral divergence, hence hindering many underlying applications and limiting the improvement of efficiency. To improve the lateral beam quality of BA diode lasers, numerous methods have been proposed, including a tapered waveguide, 7) tilted cavity, 8) phase structure, 9,10) resonant antiguiding, 11) and external cavity techniques. 12) However, the improvement of lateral beam quality is often accompanied by either sacrificing output power or an increased processing complexity, as well as the cost of these methods.…”

mentioning

confidence: 99%

Beam control of high-power broad-area photonic crystal lasers using ladderlike groove structure

Wang

Shu

et al. 2017

Appl. Phys. Express

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The high-power broad-area (BA) photonic bandgap crystal (PBC) diode laser is promising as a high-brightness laser source, however, it suffers from poor lateral beam quality owing to the intrinsic drawback of BA lasers. In this paper, a ladderlike groove structure (LLGS) was proposed to improve both the lateral beam quality and emission power of BA PBC lasers. An approximately 15.4% improvement in output power and 25.2% decrease in the lateral beam parameter product (BPP) were realized and the underlying mechanism was discussed. On the basis of the one-dimensional PBC epitaxial structure, a stable vertical far field was demonstrated.

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Modeling electro-optical characteristics of broad area semiconductor lasers based on a quasi-stationary multimode analysis

Cited by 7 publications

References 7 publications

Numerical simulation and optimization of microstructured high brightness broad area laser diodes

Numerical simulation and optimization of microstructured high brightness broad area laser diodes

Mode shaping in semiconductor broad area lasers by monolithically integrated phase structures

Beam control of high-power broad-area photonic crystal lasers using ladderlike groove structure

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