Improvement of the beam quality of high-power broad area semiconductor diode lasers by means of an external resonator [Elektronische Ressource] / Ahmad Ibrahim Bawamia. Betreuer: Günther Tränkle

Improvement of the beam quality ofhigh-power broad area semiconductordiode lasers by means of an externalresonatorvorgelegt vonDiplom-IngenieurAhmad Ibrahim Bawamiaaus Port-Louis, MauritiusVon der Fakult¨at IV – Elektrotechnik und Informatikder Technischen Universit¨at Berlinzur Erlangung des akademischen GradesDoktor der Naturwissenschaften- Dr. rer. nat -genehmigte DissertationPromotionsausschuss:Vorsitzender: Prof. Dr. Heinrich KlarBerichter: Prof. Dr. Gunther Trankle¨ ¨Prof. Dr. Serge MottetTag der wissenschaftlichen Aussprache: 18. November 2011Berlin, 2011D 832AcknowledgmentFirst of all, i would like to express my gratitude to the Prof. Dr. G. Trankle for having¨offered me the opportunity to carry out my PhD. work at the Ferdinand-Braun-Institut,Leibniz Institut fur Hochstfrequenztechnik (FBH), and for supervising the present work.¨ ¨His constant advice, his encouragement, and the fruitful thematic discussions have beenof great help during the course of this work.My thanks also go to Prof. Dr. Serge Mottet for having accepted to act as secondappraiser of the PhD. thesis.I am indebted to Dr. G. Erbert for his guidance and for his valuable advice, especiallyin the choice of the diode lasers used in the frame of this work.I am deeply gratefulto Dr. B. Eppich and Dr. K. Paschke for their telling contributionatall levels of this work. Their permanent availability, their advice, and their constructiveideas are duly appreciated.