摘要
A high-brightness ultrabroadband supercontinuum white laser is desirable for various fields of modern science.Here,we present an intense ultraviolet-visible-infrared full-spectrum femtosecond laser source(with 300–5000 nm 25 dB bandwidth)with 0.54 mJ per pulse.The laser is obtained by sending a 3.9μm,3.3 mJ mid-infrared pump pulse into a cascaded architecture of gas-filled hollow-core fiber,a bare lithium niobate crystal plate,and a specially designed chirped periodically poled lithium niobate crystal,under the synergic action of second and third order nonlinearities such as high harmonic generation and self-phase modulation.This full-spectrum femtosecond laser source can provide a revolutionary tool for optical spectroscopy and find potential applications in physics,chemistry,biology,material science,industrial processing,and environment monitoring.
基金
The authors are grateful for the financial support from the Science and Technology Project of Guangdong(2020B010190001)
National Natural Science Foundation of China(11974119,61925507,62075227)
Guangdong Innovative and Entrepreneurial Research Team Program(2016ZT06C594)
National Key R&D Program of China(2018YFA 0306200)
Shanghai Rising-Star Program(21QA1410200)
Youth Innovation Promotion Association CAS(2020248).
