Efficient and Broadband Emission in Dy3+-Doped Glass-Ceramic Fibers for Tunable Yellow Fiber Laser

Qianyi Chen; Minbo Wu; Puxian Xiong; Yajing Zhao; Shuhang Tian; Yao Xiao; Yongsheng Sun; Dongdan Chen; Shanhui Xu; Zhongmin Yang

doi:10.3390/nano13091558

Efficient and Broadband Emission in Dy³⁺-Doped Glass-Ceramic Fibers for Tunable Yellow Fiber Laser

Nanomaterials (Basel). 2023 May 5;13(9):1558. doi: 10.3390/nano13091558.

Authors

Qianyi Chen¹, Minbo Wu^{1

2}, Puxian Xiong¹, Yajing Zhao¹, Shuhang Tian¹, Yao Xiao¹, Yongsheng Sun¹, Dongdan Chen¹, Shanhui Xu^{1

2}, Zhongmin Yang¹

Affiliations

¹ State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, China.
² School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510641, China.

Abstract

Yellow lasers are of great interest in biology, medicine and display technology. However, nonlinear emission of near-infrared lasers at yellow still presents particularly complex optical alignment to date. Here, to the best of our knowledge, we demonstrate the fabrication of a NaLa(WO₄)₂: Dy³⁺ glass-ceramic fiber (GCF) for the first time. More importantly, the emission band of the GCF, which is around 575 nm, has a wide full-width half maximum (FWHM) of 18~22 nm, which is remarkably larger than that of the Dy³⁺-doped YAG crystal (<7 nm). The precursor fiber (PF) was drawn using the molten core drawing (MCD) method. In particular, benefiting from the in situ nanocrystals fabricated in the amorphous fiber core after thermal treatment, the resultant glass-ceramic fiber exhibits a five-times enhancement of luminescence intensity around 575 nm, compared with the precursor fiber, while retaining its broadband emission. Overall, this work is anticipated to offer a high potential GCF with prominent bandwidth for the direct access of a tunable yellow laser.

Keywords: broadband; glass-ceramic fiber; yellow emission.

Grants and funding

This research was funded by National Natural Science Foundation of China, grant number 62235014; The Key R&D Program of Guangzhou, grant number 202007020003.