High energy rectangular pulse generated in a low repetition rate all normal-dispersion Yb3+-doped fiber laser. (26th February 2015)

• Record Type: Journal Article
• Authors: Lin, Ja-Hon; Lai, Beng-Cheng; Lee, Yin-Wen
• Is Part Of: Laser physics. Volume 25:Number 4(2015:Apr.)
• Publication Date: 2015-02-26
• Subjects: ytterbium doped fiber laser -- all normal dispersion -- rectangular shape pulse; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1054-660X/25/4/045101
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: With elongated cavity length, a 317 kHz low-repetition-rate rectangular pulse was demonstrated in an all-normal dispersion mode-locked (ML) ytterbium-doped fiber laser (YDFL) based on the nonlinear polarization evolution technique. As the pump power increased, the duration of the rectangular pulse broadened linearly without wave-breaking. At a maximum pump power of 240 mW, a rectangular pulse with a duration of 20.5 ns and highest pulse energy of 182 nJ was produced. Through an Yb 3+ -doped fiber amplifier with 4 W pump power, the energy of the rectangular pulse was further amplified up to 2.28 µ J. The duration of the rectangular pulse remained constant as the pump energy increased and revealed no pulse distortion under the maximum output energy.