Graphene oxide-COOH as a new saturable absorber for both Q-switching and mode-locking fiber lasers

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2017,（10）
• 页码范围: 76-80
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL201715.101402

摘要

Graphene oxide carboxylic acid (COOH),a novel two-dimensional (2D) layered material with its unique optical and electronic properties,is discovered to exhibit the saturation of optical absorption under laser illumination.Applying the liquid-phase exfoliation method,we prepare graphene oxide-COOH dispersions with deionized water and fabricate graphene oxide-COOH polyvinyl alcohol polymer composite film.We further obtain stable Q-switching pulse and mode-locked laser operation with a 22.7 MHz repetition rate and a 1.5 ps pulse duration by incorporating the graphene oxide-COOH-based saturable absorbers into the all-fiber erbium-doped fiber laser cavity.The experimental results show that the proposed graphene oxide-COOH material can act as an effective absorber for pulsed fiber lasers,which demonstrate potential applications in the area of ultrafast optics.