Abstract:A record net gain of 17-dB has been demonstrated in a 300-nm broadband single-mode Cr-doped crystalline core fiber (CCF) with a 19-µm core diameter and 18-cm fiber length. The gain-per-unit-length of the CCF, which is an impressive 94 dB/m, is significantly higher than that currently achieved in other rare-earth doped fiber amplifiers, such as Er and Bi-doped fibers. This high gain was achieved by matching the transmission mode between CCF and single mode fiber for improving the coupling efficiency. We control… Show more
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