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. 2015 Sep 2;5:13689. doi: 10.1038/srep13689

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(a) The photograph of patchcord end-face with and without hydrogen-free and low temperature synthesized graphene on the surface. (b) The oscilloscope trace of passively mode-locked EDFL. (c) and (d) The optical spectra and autocorrelation traces of transmission-type passively mode-locked EDFL system under different pumping current. (e) The varied pulsewidth and FWHM of transmission-type passively mode-locked EDFL system under different pumping current. (f) The time-bandwidth products of the transmission-type passively mode-locked EDFL system under different pumping current.