CAJ | 학술논문

将正色散值较小的掺铒光纤引入传统的环形腔构成了低阈值的展宽脉冲锁模激光器.通过使用这种掺铒光纤,激光器的锁模阈值大大降低,激光器的自起振泵浦功率仅为90 mW,而且在29 mW的低泵浦功率时仍然可维持稳定的锁模状态.实验中获得了脉冲宽度为175 fs,光谱半高宽为40 nm,重复频率为33 MHz的锁模脉冲输出.激光器工作稳定,光谱干净光滑.
장정색산치교소적참이광섬인입전통적배형강구성료저역치적전관맥충쇄모격광기.통과사용저충참이광섬,격광기적쇄모역치대대강저,격광기적자기진빙포공솔부위90 mW,이차재29 mW적저빙포공솔시잉연가유지은정적쇄모상태.실험중획득료맥충관도위175 fs,광보반고관위40 nm,중복빈솔위33 MHz적쇄모맥충수출.격광기공작은정,광보간정광활.
A low threshold stretched-pulses mode-locked Erbium-doped fiber ring cavity femtosecond laser with small positive-dispersion Er3+-doped fiber was demonstrated.By introducing the small positive-dispersion fiber,the pulse energy and spectrum width were improved,the sideband of the spectrum was effectively restrained,and the self-starting pump power threshold was only 90 mW.The passive mode-locked continued to a pump power level as low as 29 mW.Self-starting mode-locked pulses with time duration of 175 fs,spectral width of 40 nm and repetition rate of 33 MHz were achieved by using this stretched-pulse configuration.