Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Reexamination Certificate
2006-09-12
2006-09-12
Hughes, Deanora M. (Department: 3663)
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
C359S337210
Reexamination Certificate
active
07106501
ABSTRACT:
A fiber amplifier module for amplifying a signal pulse includes an optically pumped double-pass fiber amplifier in which a fiber Bragg grating reflects an amplified pulse in between the first and second amplification passes, and transmits most forward-propagating amplified spontaneous emission (ASE) generated by the optical pumping. The reflected amplified pulse from the double-pass amplifier, and reverse-propagating ASE generated by the optical pumping are reflected from another fiber Bragg grating that again reflects the amplified pulse and transmits most of the ASE. The twice-reflected amplified pulse can be delivered from the amplifier as an output pulse or passed to another amplifier module for further amplification. The amplifier fiber is operated in a saturated or near saturated mode. This reduces amplification of any portion of the forward-propagating ASE that is reflected into reverse propagation by the fiber Bragg grating of the double-pass amplifier.
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Bettencourt Skip
Starodoumov Andrei
Bolda Eric
Coherent Inc.
Hughes Deanora M.
Stallman & Pollock LLP
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