Title: Analytical model for the design of external-cavity passively Q-switched fiber lasers
Authors: Huang, J. Y.
Liang, H. C.
Su, K. W.
Chen, Y. F.
電子物理學系
Department of Electrophysics
Keywords: fiber-laser;analytical model;passively Q-switched
Issue Date: 2008
Abstract: An analytical model has been developed to minimize the effective mode area in a saturable absorber for an external-cavity passively Q-switched fiber laser. Under the condition of minimum effective mode size inside the saturable absorber, the analytical expressions for two key parameters of an optimum system have been derived. One parameter is the optimum focal position that is analytically derived to be a function of the thickness and initial transmission of the saturable absorber. The other parameter is the optimum magnification of the re-imaging optics that is analytically derived to be in terms of the numerical aperture and core radius of the laser fiber as well as the thickness and initial transmission of the saturable absorber. The present model provides a straightforward procedure to adopt a focusing system for the output performance. A diode-pumped ytterbium-doped fiber lasers with a Cr:YAG crystal as a saturable absorber is considered to illustrate the utility of the present model.
URI: http://hdl.handle.net/11536/32486
ISBN: 978-0-8194-7048-5
ISSN: 0277-786X
Journal: FIBER LASERS V: TECHNOLOGY, SYSTEMS, AND APPLICATIONS
Volume: 6873
Begin Page: U392
End Page: U400
Appears in Collections:Conferences Paper