The properties of glass-clad fibers containing cores of phase pure and highly crystalline silicon and germanium are reviewed. Although further optimization is required, losses of about 4 dB/m have been achieved at 3 µm and suggest that such semiconductor core fibers could be of value for nonlinear and infrared applications.
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J. Ballato, T. Hawkins, P. Foy, B. Kukuoz, C. McMillen, R. Stolen, N. K. Hon, B. Jalali, and R. Rice, "Progress in Semiconductor Optical Fibers," in Asia Communications and Photonics Conference and Exhibition, Technical Digest (CD) (Optical Society of America, 2009), paper FI1.
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