Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2006-06-27
2006-06-27
Keith, Jack (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
C359S341420, C398S031000
Reexamination Certificate
active
07068421
ABSTRACT:
An optical fiber propagates and amplifies a second signal light that is a wavelength-multiplexed signal of a first signal light of a plurality of wavelengths and a reference light that is out of a wavelength range of amplification. An excitation light source outputs an excitation light for amplifying the second signal light. A beam splitter splits a portion of the second signal light into the first signal light and the reference light. A signal light level detecting unit detects a level of the first signal light. A reference light level detecting unit detects a level of the reference light. A signal level setting unit calculates a target value for constantly maintaining a Raman gain, and controls the output level of the excitation light in such a way that the first signal level matches with the target value.
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Kajiya Satoshi
Kogure Taichi
Mizuochi Takashi
Tokura Toshiyuki
Birch & Stewart Kolasch & Birch, LLP
Diacou Ari M.
Keith Jack
Mitsubishi Denki & Kabushiki Kaisha
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