Dual Divalent Cations‐Doped Near‐Infrared Garnet Phosphors with Charge Compensation and Surface Modification for Next‐Generation Broadband Fiber Amplifiers
Journal
Laser and Photonics Reviews
ISSN
1863-8880
1863-8899
Date Issued
2025-08-12
Author(s)
Hsiao, Yu‐Hsuan
Chen, Kuan‐Chun
Chien, Chun‐Ling
Majewska, Natalia
Kamiński, Mikołaj
Mahlik, Sebastian
Leniec, Grzegorz
Mijowska, Ewa
Huang, Sheng‐Lung
Abstract
Near-infrared (NIR)-II phosphor-converted light-emitting diodes (NIR-II pc-LEDs) have been extensively developed using NIR-II phosphor with commercial LEDs. However, the application of NIR-II phosphor in optical communications remains underexplored. In this work, a phosphor series of Y3−x−yAl4.9O12:0.1Cr,xCa2+,yMg2+ is simultaneously tuned with Mg2+ and Ca2+, resulting in Y2.76Al4.9O12:0.1Cr,0.16Ca2+,0.08Mg2+ (YAG:0.1Cr,0.16Ca,0.08Mg) crystal fiber, with a length of 2.65 cm and a diameter of 216.95 µm, is grown from the optimized phosphor. The fabrication process involved phosphor synthesis, pellet production, and crystal fiber growth using the laser-heated pedestal growth method. Proposed dual cations modification allowed to i) enhance NIR-II broadband emission in 1100–1600 nm by improving the structure due to the incorporation of Mg2+ ions and ii) provide additional tetrahedral sites for Cr4+ ions via Mg2+/Ca2+ introduction. The YAG:0.1Cr,0.16Ca,0.08Mg crystal fiber exhibits promoted luminescence compared with the commercial Cr4+-doped Y3Al5O12 crystal fiber, indicating its potential as a fiber amplifier in optical communications.
Subjects
broadband emission
charge compensation
crystal fiber
near-infrared phosphor
surface modification
SDGs
Publisher
Wiley
Type
journal article