Femtosecond ytterbium-doped fiber laser mode-locked by carboxyl-functionalized graphene oxide saturable absorber. (30th November 2017)

• Record Type: Journal Article
• Authors: Hou, Lei; Lin, Qimeng; Wang, Yonggang; Chen, Zhendong; Sun, Jiang; Guo, Hongyu; Bai, Yang; Chen, Haowei; Lu, Baole; Bai, Jintao
• Is Part Of: Applied physics express. Volume 11:Number 1(2018)
• Publication Date: 2017-11-30
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.11.012702
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: In contrast with graphene oxide (GO), carboxyl-functionalized graphene oxide (GO-COOH) is more appropriate for fabricating saturable absorbers (SAs) with high modulation depth and low nonsaturable loss because of its higher solubility in water. Here, we present a femtosecond mode-locked ytterbium-doped fiber (YDF) laser based on GO-COOH SA and a nonlinear polarization rotation effect. A mode-locked laser with a center wavelength of 1027 nm, an average output power of 53.5 mW (44.3% conversion efficiency), a fundamental repetition rate of 22 MHz, a pulse duration of 239 fs, and a signal-to-noise ratio of up to 75 dB is obtained.