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Kai Han

National University of Defense Technology

Changsha Hunan, 410073

China

  • National University of Defense Technology

SCHOLARLY PAPERS

7

DOWNLOADS

180

TOTAL CITATIONS

0

Scholarly Papers (7)

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1.

Highly Thermally Stable Upconversion in Copper(Ii)-Doped Liyf4:Yb,Er Microcrystals Toward Ultrahigh Temperature (Micro)Thermometers

Number of pages: 13 Posted: 04 Apr 2022
Maohui Yuan, Kai Han, Linxuan Wang, Xu Yang, Zining Yang, Hongyan Wang and Xiaojun Xu
National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology and National University of Defense Technology
Downloads 41 (1,170,409)

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Single NaYF4:Yb, Er microcrystals, Copper(II), Upconversion luminescence, Thermometers, Thermal quenching

2.

Quantitative Evaluation of the Heat Induced by Fusion Splices in High-Power Fiber Lasers

Number of pages: 9 Posted: 17 Jun 2022
Kai Han, zhaokai lou, zichao zhou, xiaoming xi, Wenda Cui, changqing song and Xiaojun Xu
National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology and National University of Defense Technology
Downloads 33 (1,277,121)

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Fiber laser, Fusion splices, Temperature rise

3.

Stark splitting-induced tunable energy gaps of Er3+ for wide-range ratiometric thermometry in a fiber microsphere

Number of pages: 11 Posted: 12 Nov 2025
Xuanhao Zhang, Guichen Bao, Shuai Hu, Jinshu Huang, Chao Lin, Xin Guo, Maohui Yuan and Kai Han
National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology and National University of Defense Technology
Downloads 31 (1,345,526)

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Er3+, Stark splitting, Upconversion luminescence, Ratiometric thermometry, Fiber microsphere

4.

Improved Transient Multicolor Upconversion Luminescence by Strong Excitation and Sensitizer Concentration Alteration in Β-Nayf4:Yb/Ho Microcrystals

Number of pages: 11 Posted: 19 Apr 2024
Mingchen Li, Maohui Yuan, Wenda Cui, Hao Liu, Zhongyang Xing, Chuan Guo and Kai Han
National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology and National University of Defense Technology
Downloads 26 (1,372,601)

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Kewords: multicolor upconversion luminescence, strong excitation, upconversion luminescence dynamics, high sensitizer concentration, upconversion pathways

5.

Low-Temperature Properties of the Ytterbium-Doped Fiber Laser Cooled by the Thermoelectric Cooler

Number of pages: 10 Posted: 22 Mar 2022
Kai Han, zhaokai lou, xiaoming xi, Wenda Cui and changqing song
National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology and National University of Defense Technology
Downloads 26 (1,372,601)

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fiber laser, low-temperature, temperature control, thermoelectric cooler, temperature measurement.

6.

Identification of the Phase Evolution Through the Upconversion Emission in Flame-Made Yag: Yb3+/Er3+ Nanoceramics

Number of pages: 15 Posted: 24 Nov 2023
Shuai Hu, Changqing Song, Maohui Yuan, Xin Guo, Hanchang Huang, Zelin Liu, Wenda Cui, Hongyan Wang, Zining Yang and Kai Han
National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology and National University of Defense Technology
Downloads 21 (1,436,435)

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YAG nanoceramics, Flame spray pyrolysis, Phase transitions, Upconversion

7.

Unravelling the Intrinsic Luminescence in Single-Doped Yb3+ Fiber Microspheres for Multi-Mechanism Optical Thermometry

Number of pages: 33 Posted: 27 May 2026
Guichen Bao, Xuanhao Zhang, Chao Lin, Bowen Lv, Shuai Hu, Jinshu Huang, Xin Guo, Xiaoming Xi, Maohui Yuan and Kai Han
National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology, National University of Defense Technology and National University of Defense Technology
Downloads 2 (1,584,314)

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Optical thermometry, Trivalent ytterbium ions, Intrinsic luminescence, Fiber microspheres, Fluorescence intensity ratio (FIR)