02783nam 2200421 450 991080881620332120230112175225.09783736966260(electronic bk.)9783736976269(MiAaPQ)EBC7048821(Au-PeEL)EBL7048821(CKB)24276176900041(EXLCZ)992427617690004120230112d2022 uy 0engurcnu||||||||txtrdacontentcrdamediacrrdacarrierBroad-area laser bars for 1 kW-emission demonstrating increased efficiency and narrowed far field /Matthias M. Karow1st ed.Göttingen :Cuvillier Verlag,[2022]©20221 online resource (143 pages)Innovationen mit Mikrowellen und Licht. Forschungsberichte aus dem Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik ;v.70Print version: Karow, Matthias M. Broad-Area Laser Bars for 1 kW-Emission Göttingen : Cuvillier Verlag,c2022 9783736976269 Intro -- Abstract -- 1. Introduction -- 1.1. The global laser market -- 1.2. State of the art -- 1.3. Structure of this work -- 2. Theoretical Background -- 2.1. Concept and physics of broad-area laser bars -- 2.2. Definition and governing effects of beam quality in broad-area lasers -- 2.3. Strained diode-laser chips -- 2.4. Thermal aspects of diode-laser operation -- 3. Experimental Methods -- 3.1. Fabrication of broad-area laser bars -- 3.2. Characterization techniques -- 4. Diode-Laser Bars for Highly Efficient 1 kW-Emission -- 4.1. Vertical structure for high-efficiency operation -- 4.2. Thermal transient -- 4.3. Varied resonator length -- 4.4. Impact of the lateral design -- 4.5. Conclusions -- 5. Efficient 1 kW-Emitting Bars Exhibiting Narrow Far Field -- 5.1. Mechanical chip deformation (bar smile) -- 5.2. Emitter cross heating -- 5.3. Bar edge emitters -- 5.4. Emitter sub-structure -- 5.5. Conclusions -- 6. Conclusions and Outlook -- Appendices -- A. Beam-Path Calculation Using the Matrix Formalism -- B. Thermal Wavelength Dependence of Longitudinal Modes -- Bibliography -- Public ContributionsPublic Contributions -- Acknowledgements -- Biographical Sketch.Innovationen mit Mikrowellen und Licht. Forschungsberichte aus dem Ferdinand-Braun-Institut, Leibniz-Institut für HöchstfrequenztechnikEmission spectroscopyEmission spectroscopy.543.0858Karow Matthias M.1654670MiAaPQMiAaPQMiAaPQ9910808816203321Broad-area laser bars for 1 kW-emission4006645UNINA