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

Figure 3. Passively mode-locked EDFL performances by reflection-type graphene saturable absorber.

Figure 3

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