Cookies help us deliver our services. By using our services, you agree to our use of cookies.
De En Es
Kundenservice: +49 (0) 551 - 547 24 0

Cuvillier Verlag

Publications, Dissertations, Habilitations & Brochures.
International Specialist Publishing House for Science and Economy

Cuvillier Verlag

Premiumpartner
De En Es
2019-02-11_banner_durchlaufend_versandkostenfrei_jan-apr Titelbild-leitlinien
Investigation of monolithically integrated spectral stabilization in high-brightness broad area diode lasers

Hard Copy
EUR 49.50

E-book
EUR 34.70

Investigation of monolithically integrated spectral stabilization in high-brightness broad area diode lasers (Volume 44)

Jonathan Decker (Author)

Preview

Extract, PDF (400 KB)
Table of Contents, PDF (93 KB)

ISBN-13 (Hard Copy) 9783736997981
ISBN-13 (eBook) 9783736987982
Language English
Page Number 174
Edition 1.
Book Series Innovationen mit Mikrowellen und Licht. Forschungsberichte aus dem Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
Volume 44
Publication Place Göttingen
Place of Dissertation TU Berlin
Publication Date 2018-06-06
General Categorization Dissertation
Departments Physics
Keywords spectral stabilization, DFB-BA lasers, diode laser systems, high order gratings, bi-directional eigenmode expansion, propagation modelling
Description

High-power distributed feedback broad area (DFB-BA) lasers are key components for pumping narrow absorption bands in solid-state lasers and for brightness scaling in direct diode laser systems via dense spectral beam combining. Today, the market for these lasers is dominated by DFB-BA lasers with low-order Bragg gratings that are integrated via buried overgrowth techniques.
A promising alternative are DFB-BA lasers with high order grat-ings that are directly etched into the p-side of the epitaxial layer structure, so that no interruption of the epitaxial growth process is required. Prior to this work, studies of such DFB-BA lasers were restricted to experimental proof-of-principal realizations. Further, adequate simulation tools were not available, as surface-etched gratings introduce a high refractive index contrast and can therefore not be calculated directly within the coupled mode theory (CMT).
Hence, this work treats the development of efficient high-bright-ness DFB-BA lasers and laser arrays with surface-etched gratings at 975 nm. The development of these lasers encompasses three steps: First, a design study of high-brightness Fabry-Pérot laser diodes that are suitable for the integration of surface-etched gratings. Second, the implementation of an adequate numerical model for the simulation of high-order surface-etched DFB grat-ings. Therefore, a simulation based on CMT is extended by bi-directional eigenmode expansion and propagation modelling. And third, a comprehensive experimental study of spectrally stabilized high-brightness DFB-BA lasers. Optimized DFB-BA lasers (L = 6 mm, W = 30 µm) operate with 56% peak conversion efficiency and achieve 5.8 W output power with a slow-axis beam parameter product ≤ 1.8 mm×mrad, and a linewidth ≤ 1.0 nm.