We report a highly versatile chemical-in-crucible preform fabrication technique suitable for gas-phase deposition of doped optical fibers. Aluminosilicate and ytterbium-doped phosphosilicate fibers are presented demonstrating the technique and its potential for realizing complex fiber designs that are suitable for the next generation of high-power fiber devices. The results show aluminum-doped fiber with numerical aperture of 0.28 and ytterbium-doped fiber with a measured slope efficiency of 84% with respect to pump launch power.
© 2011 IEEE
Alexander J. Boyland, Andrew S. Webb, Seongwoo Yoo, Francesca H. Mountfort, Mridu P. Kalita, Robert J. Standish, Jayanta K. Sahu, David J. Richardson, and David N. Payne, "Optical Fiber Fabrication Using Novel Gas-Phase Deposition Technique," J. Lightwave Technol. 29, 912-915 (2011)