Affiliation:
1. Department of Chemistry National Taiwan University Taipei 106 Taiwan
2. Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei 106 Taiwan
3. Institute of Experimental Physics Faculty of Mathematics, Physics, and Informatics University of Gdansk Wita Stwosza 57 Gdańsk 80‐308 Poland
4. Department of Nanomaterials Physicochemistry Faculty of Chemical Technology and Engineering West Pomeranian University of Technology in Szczecin Szczecin 70‐311 Poland
Abstract
AbstractNear‐infrared‐II (NIR‐II) phosphors are extensively used as NIR phosphor‐converted light‐emitting diodes across various applications. Nonetheless, their application in fiber communication remains underexplored. Furthermore, efficiency challenges persist in developing broadband NIR crystal fiber amplifiers. A series of the Y3−yAl5−xO12:xCr,yCa2+ phosphors with boosted Cr4+ concentration via calcium charge compensation is synthesized, and the optimized sample is fabricated to crystal fibers to reveal the application of the NIR‐II phosphors to fiber communication. The fabricated Cr4+‐doped crystal fiber, exhibiting broadband Cr4+ emission within 1100–1600 nm, effectively covers the high‐transmission loss region caused by water absorption in the telecommunication band. Comprehensive characterization and analyses of the Cr4+ are discussed. Y2.84Al4.9O12:0.1Cr,0.16Ca2+ crystal fiber, fabricated through phosphor synthesis, pellets’ production, and the laser‐heated pedestal growth method, exhibits superior photoluminescence compared to the commercial Cr4+‐doped Y3Al5O12 crystal fiber. Here the potential of NIR‐II phosphors is highlighted in enhancing fiber communication and valuable insights for their future application are provided.
Funder
National Science and Technology Council