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Efficient double-clad Yb3+-doped silica fibre laser pumped by an unfocused diode laser
Authors:M.L. Åslund  S.D. Jackson  N. Jovanovic  M.J. Withford
Affiliation:1. Optical Fibre Technology Centre, University of Sydney, Sydney, Australia;2. Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), MQ Photonics Research Centre, Macquarie University, Sydney, Australia;1. Photonics and Terahertz Technology, Ruhr-University Bochum, Universitaetsstrasse 150, 44780 Bochum, Germany;2. Faculty of Electrical and Electronic Engineering, Georg Agricola University of Applied Sciences, Herner Strasse 45, 44787 Bochum, Germany;1. Centro de Lasers e Aplicações, IPEN-SP, 05508-000 São Paulo, SP, Brazil;2. Laboratório de Vidros e Datações, FATEC-SP, 01124-060 São Paulo, SP, Brazil;3. Centro de Ciência e Tecnologia de Materiais, IPEN-SP, 05508-000 São Paulo, SP, Brazil;1. Islamic Azad University, Tehran South Branch, Tehran, Iran;2. Iranian National Center for Laser Science and Technology, 1465733441 Tehran, Iran
Abstract:A moderate output power Yb3+-doped double-clad fibre laser pumped by an unfocused diode laser is reported. This pumping configuration omits micro positioned lenses used in fibre coupled laser diodes, thus making the system significantly less complex and more robust. The maximum launch efficiency was ~80% and the maximum output power was >5 W with a measured FWHM of 18 pm.
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