Sb2Te3 mode-locked ultrafast fiber laser at 1.93 μm<xref rid="cpb_27_8_084214_fn1" ref-type="fn">*</xref><fn id="cpb_27_8_084214_fn1"><label>*</label>Project supported by the National Natural Science Foundation of China (Grant Nos. 61775146, 11704260, 61405126, and 61605122), the Shenzhen Science and Technology Project (Grant Nos. JCYJ20160427105041864, JSGG20160429114438287, KQJSCX20160226194031, JCYJ20160422103744090, and JCY20150324141711695), and the Natural Science Foundation of Guangdong Province, China (Grant Nos. 2016A030310049, 2016A030310059, and 2017A030310402).</fn>

Sb₂Te₃ mode-locked ultrafast fiber laser at 1.93 μm**

Project supported by the National Natural Science Foundation of China (Grant Nos. 61775146, 11704260, 61405126, and 61605122), the Shenzhen Science and Technology Project (Grant Nos. JCYJ20160427105041864, JSGG20160429114438287, KQJSCX20160226194031, JCYJ20160422103744090, and JCY20150324141711695), and the Natural Science Foundation of Guangdong Province, China (Grant Nos. 2016A030310049, 2016A030310059, and 2017A030310402).

Wang Jintao^{1, 2}, Yin Jinde^{1, 2}, He Tingchao³, Yan Peiguang^{1, †}

(color online) (a) Raman spectrum of Sb₂Te₃ film. (b) The normalized open-aperture Z-scan trace. (c) The normalized CA/OA Z-scan trace. (d) Pump–probe measurement of the carrier lifetime of Sb₂Te₃.