Systems and Techniques for Suppressing Backward Lasing in High-Power Cascaded Raman Fiber Lasers
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United States of America Patent
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Issued Date -
Nov 11, 2010
app pub date -
May 11, 2010
filing date -
May 11, 2009
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Abstract
In a light amplification system and technique, a pump source provides pump power at a source wavelength. The pump power is launched as an input into a cascaded Raman resonator. A wavelength-dependent loss element is connected such that it precedes the cascaded Raman resonator. The wavelength-dependent loss element is configured to transmit light power at the source wavelength with low loss, and to provide high loss at the first Stokes shift. The wavelength-dependent loss element prevents buildup of light power between the pump source and the cascaded Raman resonator, thereby preventing backward propagation of light power back into the pump source.
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