We demonstrate a low-concentrated solar-pumped fiber laser with all-inorganic cesium lead halide perovskite quantum dots (QDs), which function as a sensitizer. The perovskite QDs exhibit substantial advantages for solarpumped laser applications because of their broad absorption and narrow emission spectra with high quantum yield. We successfully tuned the peak emission wavelength of the perovskite QDs by altering the I/Br ratio in order to achieve spectral overlap with Nd³⁺ ions, which have been widely used as a laser medium for solar-pumped lasers. The measurement results show that the laser output power is highly sensitive to the peak emission wavelength of the QDs. Although our synthesized QDs have a quantum yield of approximately 65%, which is less than that of conventional organic dyes, the laser performance was comparable because the fluorescence spectrum is tailored to the Nd³⁺ absorption band.

Date Published: 7 March 2019
PDF: 7 pages
Proc. SPIE 10897, Fiber Lasers XVI: Technology and Systems, 1089710 (7 March 2019); doi: 10.1117/12.2509756

Published in SPIE Proceedings Vol. 10897:
Fiber Lasers XVI: Technology and Systems
Adrian L. Carter; Liang Dong, Editor(s)