Author : Joerg Neuhaus
Publisher : Lulu.com
ISBN 13 : 140926985X
Total Pages : 207 pages
Book Rating : 4.4/5 (92 download)
Book Synopsis Mode Locking of an Active Multipass Geometry by : Joerg Neuhaus
Download or read book Mode Locking of an Active Multipass Geometry written by Joerg Neuhaus and published by Lulu.com. This book was released on 2009-03-25 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrashort laser pulses in the microjoule regime are of prime importance for manyapplications. Previous record pulse energiesobtained directly from an oscillator in ambient atmosphere were below 2 Î1⁄4J. This thesis describes a newly developed thin-disk laser oscillator with an increasedround-trip gain by employing a self-imaging active multipass geometry. The generationof high energy subpicosecond pulses with a pulse energy of up to 25.9 Î1⁄4J at apulse duration of 928 fs, while operated in ambient atmosphere, could be demonstrated.Stable single-pulse operation has been obtained with an average outputpower in excess of 76W at a repetition rate of 2.93MHz. Self starting passive modelockingwas accomplished using a semiconductor saturable absorber mirror (SESAM)with a modulation depth of 3.5%. The laser was operated at output-coupling rates ofup to 78%.