微纳光纤镀铂金膜锁模光纤激光器  

All-fiber mode-locked laser using platinum film-coated microfiber

作　　者：张澍霖 朱国利[1] 董光焰[1] Zhang Shulin;Zhu Guoli;Dong Guangyan(The 27th Research Institute of China Electronics Technology Group Corporation,Zhengzhou 450047,China)

机构地区：[1]中国电子科技集团公司第二十七研究所激光雷达与大功率应用技术重点实验室,郑州450047

出　　处：《强激光与粒子束》2023年第3期8-15,共8页High Power Laser and Particle Beams

摘　　要：采用有限元法仿真了微纳光纤中模式在镀膜前后的能量、电场及有效折射率变化,分析了HE_(11)、TE_(01)、HE_(21)和TM_(01)模式在微纳光纤中的传输特性以及与铂金膜的相互作用原理。采用缓冲氧化物刻蚀液制作了微纳光纤并用离子喷溅法镀铂金膜,得到直径为13.2μm、铂金膜厚度为40 nm的微纳光纤器件,测试了其可饱和吸收特性,调制深度和饱和强度分别为0.57%和0.8 MW/cm^(2)。制作了全光纤锁模激光器,锁模阈值为180 mW。锁模脉冲重复频率为17.93 MHz,脉冲宽度为103 ps,中心波长为1031.6 nm,半高宽约为3.5 nm。In this paper,the finite element method is used to simulate the energy,electric field and effective refractive index changes of the modes in the microfiber before and after coating.The transmission characteristics of HE_(11),TE_(01),HE_(21)and TM_(01)modes in the microfiber and the interaction principle with the platinum film are analyzed.The microfiber was fabricated by etching the optical fiber with buffer oxide etchant,and the platinum film was coated by ion sputtering to obtain a microfiber device with a diameter of 13.2μm and a platinum film thickness of 40 nm.Its saturable absorption properties were tested,the modulation depth and saturation intensity were 0.57%and0.8 MW/cm^(2),respectively.An all-fiber mode-locked laser was fabricated,its mode-locked threshold is 180 mW.The mode-locked pulse repetition rate is 17.93 MHz,the pulse width is 103 ps,the center wavelength is 1031.6 nm,and the full width at half maximum is 3.5 nm.

关 键 词：光纤激光器 锁模 可饱和吸收体 微纳光纤 铂金膜 

分 类 号：O432.12[机械工程—光学工程]