All-fiber ultrafast laser generating gigahertz-rate pulses based on a hybrid plasmonic microfiber resonator  

作　　者：Zi-xuan Ding Zi-nan Huang Ye Chen Cheng-bo Mou Yan-qing Lu Fei Xu 

机构地区：[1]Nanjing University,College of Engineering and Applied Sciences,Nanjing,China [2]Shanghai University,Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai,Shanghai,China

出　　处：《Advanced Photonics》2020年第2期48-56,共9页先进光子学（英文）

基　　金：sponsored by the National Natural Science Foundation of China(Grant Nos.61925502,61535005,and 61975107);the National Key R&D Program of China(Grant Nos.2017YFA0303700 and 2017YFA0700503).

摘　　要：Ultrafast lasers generating high-repetition-rate ultrashort pulses through various mode-locking methods can benefit many important applications,including communications,materials processing,astronomical observation,etc.For decades,mode-locking based on dissipative four-wave-mixing(DFWM)has been fundamental in producing pulses with repetition rates on the order of gigahertz(GHz),where multiwavelength comb filters and long nonlinear components are elemental.Recently,this method has been improved using filter-driven DFWM,which exploits both the filtering and nonlinear features of silica microring resonators.However,the fabrication complexity and coupling loss between waveguides and fibers are problematic.We demonstrate a tens-to hundreds-of gigahertz-stable pulsed all-fiber laser based on a hybrid plasmonic microfiber knot resonator device.Unlike previously reported pulse generation mechanisms,the operation utilizes the nonlinear-polarization-rotation(NPR)effect introduced by the polarization-dependent feature of the device to increase intracavity power for boosting DFWM mode-locking,which we term NPRstimulated DFWM.The easily fabricated versatile device acts as a polarizer,comb filter,and nonlinear component simultaneously,thereby introducing an application of microfiber resonator devices in ultrafast and nonlinear photonics.We believe that our work underpins a significant improvement in achieving practical low-cost ultrafast light sources.

关 键 词：fiber device fiber laser MICROFIBER mode-locked laser GHz-rate pulse generation 

分 类 号：TN248[电子电信—物理电子学] TN751.2