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The fabrication and performance of single-mode Cr-doped crystalline core fiber (SMCDCCF) with high-index glass as a cladding employing on-line laser-heated pedestal growth (LHPG) technique are reported. A 3.9-dB gross gain with net gain of 1.9 dB for the SMCDCCF at wavelength of 1400-nm was obtained. The gross and net gains are the highest yet reported for SMCDCCF with high-index glass as a cladding...
Gain enhancement of single-mode Cr-doped crystalline core fiber (SMCDCCF) with longer fiber length fabricated by online laser-heated pedestal growth (LHPG) technique is demonstrated. In comparison with the SMCDCCF fabricated without online growth, the online technique enables real-time monitoring and controlling small molten zone in the LHPG to achieve longer length with better uniformity and smaller...
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