Q-switched fiber laser operating at 1.5 μm based on tungsten telluride
Compared with the extensively studied MoS2 and WS2, tungsten telluride (WTe2) owns smaller bandgap, which is applicable to near-infrared system in photodetectors, communications and ultrafast optic. In this work, the WTe2 SA with the tapered fiber structure is prepared by the magnetron-sputtering technology, which enable the prepared SA to be low in cost and has strong nonlinearity. The modulation depth of prepared WTe2 SA is measured as 31.06%. The Q-switched fiber laser operating at 1.5 μm is successfully investigated by incorporating the proposed SA into the prepared ring cavity. As far as we know, this is the first attempt of WTe2 in the Q-switched fiber laser at 1.5 μm yet.
liu mengli,Yuyi Ouyang,Hou Huanran,Liu Wenjun,Wei Zhiyi. Q-switched fiber laser operating at 1.5 μm based on tungsten telluride[J].Chinese Optics Letters,2019,17(2):02.