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US 6,297,903 B1Granted
Multiple stage optical fiber amplifier and signal generator
AssigneeSDL, Inc.
InventorsStephen G. Grubb, Bernard G. Fidric
Life of this patent
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AssigneeSDL, Inc.
InventorsStephen G. Grubb, Bernard G. Fidric
Estimating the term…
An optical amplifier makes use of a co-propagating fiber amplifier stage and a counter propagating fiber amplifier stage. One of the stages is preferably a low noise stage, while the other is a high gain stage, typically the output stage. The low noise stage may have a small core fiber while the high gain stage has a large core fiber. Pumping energy is introduced into the amplifier by coupling a plurality of laser sources in the same wavelength range using a narrow channel wavelength division multiplexer coupler. In each stage of the amplifier, some portion of the pump energy is transferred from the pumping wavelength to the signal wavelength. In a single polarization optical signal generator embodiment, the optical signal is developed in a distributed Bragg reflector oscillator having an output Bragg grating embedded in a polarization perserving fiber. A polarization controller is used at the amplifier output to restore the single polarization which is developed in the oscillator.
An optical amplifier comprising:
An optical amplifier comprising:
An optical amplifier comprising:
An optical amplifier comprising:
Dependencies are inferred from the claim text.