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Power and Efficiency Scaling of GaAs-Based Edge-Emitting High-Power Diode Lasers

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 2025年第2期31卷

作者： Crump, Paul Boni, Anisuzzaman Elattar, Mohamed Khamari, S. K. Marko, Igor P. Sweeney, Stephen J. Arslan, Seval King, Ben Miah, Md. Jarez Martin, Dominik Knigge, Andrea Casa, Pietro Della Traenkle, Guenther Ferdinand Braun Inst FBH D-12489 Berlin Germany Univ Glasgow Glasgow City G12 8QQ Scotland FBH Berlin D-12489 Berlin Germany RRCAT Indore 452013 India Univ Glasgow Glasgow City G12 8LT Scotland

current progress in the scaling of continuous wave optical output power and conversion efficiency of broad-area GaAs-based edge emitters, broad-area lasers (BALs), operating in the 900 & mldr;1000 nm wavelength range is presented. Device research and engineering efforts have ensured that BALs remain the most efficient of all light sources, so that in the past 10 years, power conversion efficiency at 20 W continuous wave (CW) output power from BA lasers with a 90 & mldr;100 mu m wide stripe has increased 1.5-fold to 57% (via epitaxial layer design developments), whilst peak CW power per single emitter has increased around 3-fold to 70 W (via scaling of device size), with further scaling underway, for example via use of multi-junction designs. However, the peak achievable CW power conversion efficiency and CW specific output power (defined here as peak output power from a 100 mu m stripe diode lasers with a single p-n junction) has changed remarkably little, remaining around 70% and 25 W, respectively, for the past decade. Fortunately, research to understand the limits to peak efficiency and specific output power has also shown progress. Specifically, recent studies indicate that spatial non-uniformity in optical field and temperature play a major role in limiting both power and conversion efficiency. Technological efforts motivated by these discoveries to flatten lateral and longitudinal temperature profiles have successfully increased both power and efficiency. In addition, epitaxial layer designs with very high modal gain successfully reduce threshold current and increase slope at 25 degrees C to values comparable to those observed at 200 K, offering a path toward the 80% conversion efficiency range currently seen only at these cryogenic temperatures. Overall, whilst operating efficiency and power continue to scale rapidly, a technological path for increased specific power and peak efficiency is also emerging.

关键词： optical resonators Semiconductor lasers Power generation Diode lasers Power lasers optical reflection Epitaxial layers Stimulated emission Reflectivity Power conversion Quantum well lasers power conversion

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Photonic lightsails: Fast and Stable Propulsion for Interstellar Travel

arXiv

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arXiv 2025年

作者： Lin, Jadon Y. de Sterke, C. Martijn Ilic, Ognjen Kuhlmey, Boris T. School of Physics The University of Sydney SydneyNSW2006 Australia Institute of Photonics and Optical Science The University of Sydney SydneyNSW2006 Australia Department of Mechanical Engineering University of Minnesota MinneapolisMN55455 United States The University of Sydney Nano Institute The University of Sydney SydneyNSW2006 Australia

Lightsails are a highly promising spacecraft concept that has attracted interest in recent years due to its potential to travel at near-relativistic speeds. Such speeds, which current conventional crafts cannot reach, offer tantalizing opportunities to probe nearby stellar systems within a human lifetime. Recent advancements in photonics and metamaterials have created novel solutions to challenges in propulsion and stability facing lightsail missions. This review introduces the physical principles underpinning lightsail spacecrafts and discusses how photonics coupled with inverse design substantially enhance lightsail performance compared to plain reflectors. These developments pave the way through a previously inaccessible frontier of space exploration. © 2025, CC BY.

关键词： Space research

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CRITICAL ANGLE REFRACTOMETRY - ACCURACY ANALYSIS

CRITICAL ANGLE REFRACTOMETRY - ACCURACY ANALYSIS

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5TH CONF ON current developments IN optical design AND optical engineering

作者： TENTORI, D CICESE (United States)

An analysis of the measuring accuracy that can be obtained using critical angle refractometry as a direct and an indirect method is made. The working conditions required to get the highest accuracy are discussed.

ISBN: (纸本)0819406554

关键词： Prisms Refractive index Error analysis Refractometry optical engineering optical design Polishing Tolerancing Ray tracing Solids

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IMAGE PLANE TILT IN optical-SYSTEMS

IMAGE PLANE TILT IN OPTICAL-SYSTEMS

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5TH CONF ON current developments IN optical design AND optical engineering

作者： SASIAN, JM AT&T Bell Labs. (United States)

Mathematical expressions are presented to relate object and image plane tilts in nonaxially symmetric systems. Examples that illustrate the use of these expressions are given. Keystone distortion is described and quan... 详细信息

ISBN: (纸本)0819406554

关键词： Distortion Geometrical optics Monochromatic aberrations optical design optical engineering Systems modeling Imaging systems Mirrors Prisms Spherical lenses

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MEMBRANE LIGHT MODULATORS - engineering design CONSIDERATIONS

MEMBRANE LIGHT MODULATORS - ENGINEERING DESIGN CONSIDERATION...

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5TH CONF ON current developments IN optical design AND optical engineering

作者： OMARA, D SCHILLER, CM WARDE, C Optron Systems Inc. (United States)

ISBN: (纸本)0819406554

Geometric parameters such as fill-factor, pixel shape, and array symmetry strongly affect the performance of membrane light modulators. A set of modeling tools that allow device performance evaluation as a function of these parameters have been developed. The models predict the effect of varying a given parameter and allow visualization of the result. The current modeling results are in good agreement with experimental observation and have formed the basis for computer-aided design of future generations of such devices.

关键词： Modulators Instrument modeling Diffraction Performance modeling Fourier transforms optical design optical engineering Solid modeling Statistical modeling Computer aided design

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COMMENTS ON THE SEIDEL ABERRATION THEORY

COMMENTS ON THE SEIDEL ABERRATION THEORY

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5TH CONF ON current developments IN optical design AND optical engineering

作者： KANG, SG LU, KC ZHU, YF Harbin Institute of Technology (China)

The expressions of the Seidel aberration theory are comparatively simple and easy to use due to its characteristics and prerequisites. Meanwhile, the effective range of the theory is limited also due to its prerequisi... 详细信息

ISBN: (纸本)0819406554

关键词： Aberration theory Monochromatic aberrations Geometrical optics Optics manufacturing optical design optical engineering Analytical research Spherical lenses Information technology Lutetium

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AN ATTEMPT TO DEVELOP ZOOM LENS design EXPERT SYSTEM

AN ATTEMPT TO DEVELOP ZOOM LENS DESIGN EXPERT SYSTEM

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5TH CONF ON current developments IN optical design AND optical engineering

作者： WENG, ZC CHEN, ZY YANG, YH REN, T CONG, XJ YAO, YC HE, FL LI, YY State Key Laboratory of Applied Optics Changchun Institute of Optics and Fine Mechanics Academia Sinica P.O. Box 1024 Changchun 130022 China Dept. of Computer Science Jilin University Changchun China

We have developed zoom lens design expert system intended to operate with little user intervention. The paper puts the emphasis on the knowledge representation, system architecture, reasoning and control strategy of t... 详细信息

ISBN: (纸本)0819406554

关键词： Expert systems

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Recent developments and applications in electronic speckle pattern interferometry

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JOURNAL OF STRAIN ANALYSIS FOR engineering design 1998年第2期33卷 153-169页

作者： Petzing, JN Tyrer, JR Univ Loughborough Dept Mech Engn Loughborough Leics England

Electronic speckle pattern interferometry (ESPI) is a wholefield non-contact optical metrology technique for displacement measurement, based on the optical physics of surface-generated laser speckle. Since its inception during the early 1970s ESPI has gradually evolved into different optical designs and has been applied to a range of engineering and non-engineering applications. Development of ESPI has continued during the 1990s with the introduction of new laser and optical technology into the interferometers, allowing further optimization and extending the potential applicability of the technique. This review considers the most notable developments of interferometer design and application that have occurred and been widely published during the 1990s, and examines the current and near-future direction of research into the technique.

关键词： speckle interferometry ESPI static dynamic transient wholefield

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REVISION OF THE SEIDEL ABERRATION THEORY FOR APPLICATION IN RANGE OF SMALL VIEWING FIELD AND LARGE APERTURE

REVISION OF THE SEIDEL ABERRATION THEORY FOR APPLICATION IN ...

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5TH CONF ON current developments IN optical design AND optical engineering

作者： KANG, SG LU, KC ZHU, YF Harbin Institute of Technology (China)

ISBN: (纸本)0819406554

The revisions of enlarging all the aberrations related to aperture to the seventh order for the Seidel aberration theory have been proposed in this paper. The practice of the revised theory in the range of small viewing field and large aperture (for example, the lens of microscope and telescope) has proven that the theory is applicable in this scale.

关键词： Monochromatic aberrations Aberration theory optical design Microscopes optical engineering Telescopes Chromatic aberrations Glasses Lutetium Wavefronts

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A METHOD OF INVESTIGATIONS OF THE optical-PROPERTIES OF ANISOTROPIC MATERIALS USING MODULATION OF THE LIGHT POLARIZATION

A METHOD OF INVESTIGATIONS OF THE OPTICAL-PROPERTIES OF ANIS...

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5TH CONF ON current developments IN optical design AND optical engineering

作者： GUMIENNY, Z MISIEWICZ, J Institute of Physics Technical University of Wroclaw Wybrzożo Wyspiańskiego 27 Wrocław 60-370 Poland

A method of investigation of the optical properties of anisotropic materials using modulation of tho light polarization is presented. Measuring set-up was constructed and used to examine tho optical properties of inte... 详细信息

ISBN: (纸本)0819406554

关键词： optical properties

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