Broadband chaos generated in an optically injected semiconductor laser is applied for power-over-fiber transmission. By varying the injection power, period-one oscillation, period-two oscillation, and chaotic oscillation are observed in the injected slave laser, indicating a period-doubling route to chaos. Compared to the free-running output of the laser, its chaotic output has a drastically increased signal bandwidth, which leads to a $19\mathrm{dB}$ increase of the stimulated Brillouin scattering threshold. Using a chaos of $5.2\mathrm{GHz}$ bandwidth, a maximum optical power of $27\mathrm{dBm}$ is obtained after $20\mathrm{km}$ transmission over fiber, which is applicable to optically powering some advanced communication networks. The approach uses the inherent nonlinear laser dynamics, which requires no modulation electronics or microwave signal sources.

© 2011 Optical Society of America

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