Anti-escaping of incident laser in rare-earth doped fluoride ceramics with glass forming layer

H F Shi; P J Lin; J X Yang; J L Yuan; E Y B Pun; Y Song; X Zhao; H Lin

doi:10.1038/s41598-019-56902-0

Anti-escaping of incident laser in rare-earth doped fluoride ceramics with glass forming layer

Sci Rep. 2019 Dec 30;9(1):20372. doi: 10.1038/s41598-019-56902-0.

Authors

H F Shi¹, P J Lin², J X Yang^{1

3}, J L Yuan², E Y B Pun³, Y Song¹, X Zhao⁴, H Lin^{5

6}

Affiliations

¹ School of Textile and Material Engineering, Dalian Polytechnic University, Dalian, 116034, P.R. China.
² Faculty of Maritime and Transportation, Ningbo University, Ningbo, 315832, P.R. China.
³ Department of Electronic Engineering and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R. China.
⁴ School of Textile and Material Engineering, Dalian Polytechnic University, Dalian, 116034, P.R. China. zhaoxin@dlpu.edu.cn.
⁵ School of Textile and Material Engineering, Dalian Polytechnic University, Dalian, 116034, P.R. China. lhai8686@yahoo.com.
⁶ Department of Electronic Engineering and State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R. China. lhai8686@yahoo.com.

Abstract

Adaptive fluoride ceramic with glass forming layer (GC_ZBL-Er) used in laser anti-escaping has been prepared by one-step synthesis, and the thickness of glass layer is identified as ~0.41 mm. Blue, green and red emissions of Er³⁺/Yb³⁺ codoped fluoride ceramic (C_ZBL-Er) and glass layer (G_ZBL-Er) have been investigated under ~980 nm laser pumping. With the forming of thin glass layer on ceramic surface, the absorption intensities on diffuse reflection of GC_ZBL-Er at 974 nm and 1.53 μm increase by 48% and 53% than those of C_ZBL-Er. Excited by a 979 nm laser, the presence of the glass layer increases the absolute absorption rate in spectral power from 75% in C_ZBL-Er to 83% in GC_ZBL-Er, which is consistent with the improvement in the absorbed photon number. In addition, the quantum yield of GC_ZBL-Er complex is raised by 28.4% compared to the case of ceramic substrate by photon quantification. Intense absorption-conversion ability and efficient macroscopical anti-escaping effect confirm the superiority of ingenious structure in the fluoride ceramics with glass forming layer, which provides a new approach for developing the absorption-conversion materials of anti-NIR laser detection.