%0 Journal Article
%A Chung, Hsiang-Yu
%A Cao, Qian
%A Chang, Guoqing
%A Kärtner, Franz
%A Liu, Wei
%T Er-Fiber laser enabled, energy scalable femtosecond source tunable from 1.3 to 1.7 μm
%J Optics express
%V 25
%N 14
%@ 1094-4087
%C Washington, DC
%I OSA
%M PUBDB-2017-04701
%P 15760 - 15774
%D 2017
%Z © Optical Society of America
%X We demonstrate that energetic femtosecond pulses tunable from 1.3 to 1.7 µm can be achieved using self-phase modulation enabled spectral broadening followed by spectral lobe filtering. Based on a home-built 5-W Er-fiber laser system operating at 31-MHz repetition rate, we obtain femtosecond pulses that can be continuously tuned from 1.3 to 1.7 µm with >4.5 nJ pulse energy. We further optimize the spectral broadening process using a fiber with larger mode area and scale up the pulse energy to >10 nJ; the resulting pulse duration is as short as  50 fs. Such a widely tunable, energetic femtosecond source is well suited for driving a laser scanning microscope to perform deep tissue multiphoton microscopy.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000407815100014
%$ pmid:28789088
%R 10.1364/OE.25.015760
%U https://bib-pubdb1.desy.de/record/324504