Laser generation using dual seeded nested and/or in-series Raman resonators, for telecommunications applications
A desired Nth-order Stokes output and zeroth-order Stokes pump input are seeded into a rare-earth doped amplifier where the power of the zeroth-order Stokes signal is amplified prior to both signals entering a Raman amplifier comprised of N−1 Raman resonators, each uniquely tuned to one of the N−1 Stokes orders, in various configurations to include one or more nested and/or in-series Raman resonators. The zeroth-order Stokes signal is converted to the Nth−1-order Stokes wavelength in steps and the power level of the Nth-order Stokes wavelength is amplified as the two signals propagate through the Raman resonators. Each Raman resonator includes a photosensitive Raman fiber located between a pair of Bragg gratings. The linewidths of the Stokes orders can be controlled by offsetting the reflectivity bandwidths of each pair of Bragg gratings respectively located in the Raman resonators.
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE
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Thomas M. Jacob R. Gerald T. Leanne J.
Shay Grosek Moore Henry