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Proceedings Paper

Use of ZnS as a self-focusing element in a self-starting Kerr lens modelocked Ti:sapphire laser
Author(s): Gary Whiton Pearson; Czeslaw Radzewicz; Jerzy S. Krasinski
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Paper Abstract

We studied the use of a highly nonlinear self-focusing element made of ZnS in an all solid- state self-starting Kerr lens modelocked Ti:sapphire laser. The results of our calculations show that the relationship between cavity losses and instantaneous intracavity power in such a laser is quite different than previously reported. The use of ZnS eliminates the need for saturable dyes or cavity modulation to initiate self-modelocked operation. We show experimentally that the pump power threshold for self-modelocking of a Ti:sapphire KLM laser can be significantly reduced by the use of a highly nonlinear intracavity element made of ZnS. Modelocking in the laser tested, which produced pulses with duration adjustable from 5 ps to 50 fs, was self-starting by Kerr lens mechanism alone. Because of the broad nonlinear response of ZnS the method is wavelength insensitive unlike quantum well saturable absorber/mirror designs.

Paper Details

Date Published: 16 May 1994
PDF: 12 pages
Proc. SPIE 2116, Generation, Amplification, and Measurement of Ultrashort Laser Pulses, (16 May 1994); doi: 10.1117/12.175841
Show Author Affiliations
Gary Whiton Pearson, Oklahoma State Univ. (United States)
Czeslaw Radzewicz, Univ. of Warsaw (Poland)
Jerzy S. Krasinski, Oklahoma State Univ. (United States)


Published in SPIE Proceedings Vol. 2116:
Generation, Amplification, and Measurement of Ultrashort Laser Pulses
Rick P. Trebino; Ian A. Walmsley, Editor(s)

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