High-Luminance White-Light Point Source Using Ce,Sm : YAG Double-Clad Crystal Fiber
Ce and Sm ions codoped yttrium aluminum garnet (Ce,Sm : YAG) double-clad crystal fibers (DCFs) were successfully fabricated using the codrawing laser-heated pedestal growth method. At a pump wavelength of 446 nm, white-light point source was produced from a 10-$mu{hbox {m}}$-core DCF. The amplified spontaneous emissions and the residual pump resulted in a directional high brightness point source. A luminance of $4.5times 10 ^{9}~hbox{cd}/hbox{m} ^{2}$ was generated. The luminous flux of the point white light was 6.2 lm. When coupled to a 200-$mu{hbox {m}}$-core multimode fiber, the output ...
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