,Zinc-oxide nanoparticle-based saturable absorber deposited by simple evaporation technique for Q-sw

• 作 者: Syarifah Aloyah Syed Husin Farah Diana Muhammad Che Azurahanim Che Abdullah Siti Huzaimah Ribut Mohd Zamani Zulkifli Mohd Adzir Mahdi
• 机 构: Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, M
• 出 处: 中国物理B（英文版）
• 发表日期: 2019年8期
• 关键词: zinc oxide saturable absorber Q-switched fiber laser

A Q-switched erbium-doped fiber laser (EDFL) incorporating zinc-oxide (ZnO) nanoparticles-based saturable absorber (SA) is proposed and demonstrated.To form the SA,the ZnO nanoparticles,which are originally in the powder form,are first dissolved in ethanol and subsequently deposited onto the surface of fiber ferrule by using the adhesion effect with the evaporation technique.By integrating the ZnO nanoparticle-based SA into a laser cavity of an EDFL,a self-started and stable Q-switching is achieved at a low threshold power of 20.24 mW.As the pump power is increased,the pulse repetition rate is tunable from 10.34 kHz to 25.59 kHz while pulse duration decreases from 21.39 μs to 3.65 μs.Additionally,this Q-switched laser has a maximum energy per pulse of 19.34 nJ and an average output power of 0.46 mW.These results indicate the feasibility and functionality of the ZnO nanoparticles-based SA for Q-switched generation,which offers the flexibility and easy integration of the SA into a ring laser cavity.