Generation of wide-bandwidth pulse with graphene saturable absorber based on tapered fiber<xref rid="cpb_28_3_034203fn1" ref-type="fn">*</xref><fn id="cpb_28_3_034203fn1"><label>*</label><p>Project supported by the National Key Research and Development Program of China (Grant No. 2018YFB0504500), the National Natural Science Foundation of China (Grant Nos. 61475171, 61705244, 61307056, and 61875052), and Natural Science Foundation of Shanghai, China (Grant Nos. 17ZR1433900 and 17ZR1434200).</p></fn>

Generation of wide-bandwidth pulse with graphene saturable absorber based on tapered fiber**

Project supported by the National Key Research and Development Program of China (Grant No. 2018YFB0504500), the National Natural Science Foundation of China (Grant Nos. 61475171, 61705244, 61307056, and 61875052), and Natural Science Foundation of Shanghai, China (Grant Nos. 17ZR1433900 and 17ZR1434200).

Zhang Ren-Li^{1, 2}, Wang Jun¹, Liao Mei-Song^{1, †}, Li Xia¹, Guan Pei-Wen¹, Liu Yin-Yao¹, Zhou Yan³, Gao Wei-Qing⁴

Output pulse characteristics: (a) output spectrum with 3-dB bandwidth of 13.6 nm at a pump power of 110.5 mW, (b) RF spectrum, and (c) output pulse train.