摘要
We present a cascaded nonlinear spectral broadening scheme for Nd-doped lasers,featuring with long pulse duration and high average power.This scheme is based on two multi-pass cells(MPCs)and one multiple-plate supercontinuum generation(MPSG),and the numerical investigation is driven by a home-made Nd-doped fiber laser with 12 ps pulse duration,50 kHz repetition rate and 100 W average power.The MPC-based first two stages allow us to broaden the pulse spectrum to 4 nm and 43 nm respectively,and subsequently,the MPSG-based third stage allows us to reach 235 nm spectral bandwidth.This broadened spectrum can support a Fourier-transfer-limited pulse duration of 9.8 fs,which is shorter than three optical cycles.To the best of our knowledge,it is the first time to demonstrate the possibility of few-cycle pulses generation based on the 10 ps level Nd-doped lasers.Such few-cycle and high average power laser sources should be attractive and prospective,benefiting from the characteristics of structure compact,low-cost and flexibility.
作者
杨西杭
吴分翔
许毅
胡家兵
白培乐
陈海东
陈洵
冷雨欣
Xi-Hang Yang;Fen-Xiang Wu;Yi Xu;Jia-Bing Hu;Pei-Le Bai;Hai-Dong Chen;Xun Chen;Yu-Xin Leng(Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)
基金
Project supported by the National Natural Science Foundation of China(Grant No.61925507)
the National Key R&D Program of China(Grant No.2017YFE0123700)
the Strategic Priority Research Program of Chinese Academic Sciences(Grant No.XDB1603)
the Shanghai Municipal Science and Technology Major Project(Grant No.2017SHZDZX02)
the Shanghai Natural ScienceFoundation(Grant No.20ZR1464600)
the Program of Shanghai Academic/Technology Research Leader(Grant No.18XD1404200)
the Shanghai Sailing Program(Grant No.21YF1453800)
Youth Innovation Promotion Association of Chinese Academic Sciences(Grant No.Y202059).