Liu Bang, Gao Lei, Cheng Wei Wei, Tang Xiao Sheng, Gao Chao, Cao Yu Long, Li Yu Jia, Zhu Tao
Opt Express. 2018 Mar 19;26(6):7155-7162. doi: 10.1364/OE.26.007155.
We demonstrate a stable, picosecond fiber laser mode-locked by cesium lead halide perovskite quantum dots (CsPbBr-QDs). The saturable absorber is produced by depositing the CsPbBr3-QDs nanocrystals onto the endface of a fiber ferrule through light pressure. A balanced two-detector measurement shows that it has a modulation depth of 2.5% and a saturation power of 17.29 MW/cm. After incorporating the fabricated device into an Er-doped fiber ring cavity with a net normal dispersion of 0.238 ps, we obtain stable dissipative soliton with a pulse duration of 14.4 ps and a center wavelength at 1600 nm together with an edge-to-dege bandwidth of 4.5 nm. The linear chirped phase can be compensated by 25 m single mode fiber, resulting into a compressed pulse duration of 1.046 ps. This experimental works proves that such CsPbBr3-QDs materials are effective choice for ultrafast laser operating with devious mode-locking states.
我们展示了一种由铯铅卤化物钙钛矿量子点（CsPbBr-QDs）锁模的稳定皮秒光纤激光器。通过光压将CsPbBr3-QDs纳米晶体沉积到光纤插芯端面上，制成可饱和吸收体。双探测器平衡测量表明，其调制深度为2.5%，饱和功率为17.29 MW/cm²。将制作的器件并入净正色散为0.238 ps的掺铒光纤环形腔后，我们获得了脉冲持续时间为14.4 ps、中心波长为1600 nm且边到边带宽为4.5 nm的稳定耗散孤子。线性啁啾相位可由25 m单模光纤补偿，从而得到1.046 ps的压缩脉冲持续时间。该实验工作证明，此类CsPbBr3-QDs材料是用于具有复杂锁模状态的超快激光器的有效选择。
