Low threshold fiber taper coupled rare earth ion-doped chalcogenide microsphere laser<xref ref-type="fn" rid="cpb141673fn1">*</xref>

Low threshold fiber taper coupled rare earth ion-doped chalcogenide microsphere laser*

Li Chao-Ran^a), Dai Shi-Xun^a)†, Zhang Qing-Yuan^b), Shen Xiang^a), Wang Xun-Si^a), Zhang Pei-Qing^a), Lu Lai-Wei^a), Wu Yue-Hao^a)‡, Lv She-Qin^a)

(a) A single mode lasing peak generated from the microsphere at a pump power of 1.39 mW. The peak is located at 1073.92 nm. (b) Expanded view of the single mode lasing peak, showing the sampling data acquired by the OSA (red dots) and its Gaussian fit (black curve) in a normalized scale.