Raman Amplifiers
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United States of America Patent
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Issued Date -
Oct 10, 2013
app pub date -
Dec 20, 2011
filing date -
Dec 22, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A pump unit (402) for a Raman amplifier (400) including an optical fibre (401) carrying an optical signal (420) is disclosed. The pump unit includes at least two light sources (411, 412, 431, 432) for emitting light at different wavelengths into the fibre to induce Raman gain of the optical signal passing along the fibre, and a controller (409) for providing pulses to each of the light sources to control when they do and do not emit light. The controller is configured to control the width of the pulses to control the total power of the light emitted into the fibre.
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