Novel High-Brightness Laser Dtodes at 830 nm

Yanson, D.A.; Qiu, Bocang; Kowalski, O.P.; McDougall, S.D.; Marsh, J.H.

doi:10.1109/leos.2006.278794

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…We have adapted the LUNAM broad-area laser design [2,3] to a tapered geometry as illustrated in Fig.2. The device incorporates a modified ridge-waveguide structure with a QWI LUNAM slab at the front facet.…”

Section: High-power Single Emittermentioning

confidence: 99%

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High-power laser arrays with 100% fill factor emission facet

et al. 2008

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Novel types of laser diode array with a 100% filling factor at the emission facet are reported. The arrays utilize both parallel and tapered cavity emitters that are connected via a common Laterally Unconfined Non-Absorbing Mirror (LUNAM) defined with quantum-well intermixing technology at 808 nm wavelength. Two LUNAM array types are considered: incoherent (weakly coupled) and coherent (diffraction coupled).Incoherent LUNAM arrays benefit from a reduced power density at the facet, improving reliability, and a near-uniform intensity distribution across the array aperture. Stacked laser diode arrays built with LUNAM bars deliver 950 W power under QCW operation with <5% degradation at 1.9×10 8 shots.Novel coherent arrays are realized using a monolithically integrated LUNAM Talbot cavity. The devices produce a single-lobed horizontal far-field pattern over a limited current range with <10% slope efficiency penalty compared to an uncoupled case. The LUNAM arrays are promising candidates for high-power, high-brightness and high-reliability operation.

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Section: High-power Single Emittermentioning

confidence: 99%

“…The performance results of the Laterally Unconfined NAM (LUNAM) single emitters were reported in Refs. [2,3].…”

Section: Introductionmentioning

confidence: 99%

High-power laser arrays with 100% fill factor emission facet

et al. 2008

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Understanding laser beam brightness: A review and new prospective in material processing

Shukla

Lawrence

Zhang

2015

Optics & Laser Technology

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a b s t r a c tThis paper details the importance of brightness in relation to laser beams. The 'brightness' of lasers is a term that is generally not given much attention in laser applications or in published literature. With this said, it is theoretically and practically an important parameter in laser-material processing. This study is first of a kind which emphasizes in-depth, the concept of brightness of lasers by firstly reviewing the existing literature and the progress with high brightness laser-material processes. Secondly, the techniques used to enhance the laser beam brightness are also reviewed. In addition, we review the brightness fundamentals and rationalize why brightness of lasers is an important concept. Moreover, an update on the analytical technique to determine brightness using the current empirical equations is also provided. A modified equation to determine the laser beam brightness is introduced thereafter. Furthermore, research studies previously conducted to modify laser design to affect laser beam brightness are also discussed. The paper not only involves a review of the techniques used to improve laser beam brightness but also reviews how bright lasers can be employed to enhance/improve laser process capabilities and cost reduction of the laser assisted processes in manufacturing.

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Novel High-Brightness Laser Dtodes at 830 nm

Cited by 2 publications

References 2 publications

High-power laser arrays with 100% fill factor emission facet

High-power laser arrays with 100% fill factor emission facet

Understanding laser beam brightness: A review and new prospective in material processing

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