Optical: systems and elements – Optical amplifier – Beam combination or separation
Reexamination Certificate
2007-08-28
2007-08-28
Hughes, Deandra M (Department: 3663)
Optical: systems and elements
Optical amplifier
Beam combination or separation
C356S477000, C356S480000
Reexamination Certificate
active
11453588
ABSTRACT:
An optical amplifier includes a first optical path, second optical path, semiconductor optical amplifier, and multi-mode interference 3-dB coupler. The first optical path guides oscillation light. The second optical path guides signal light. The semiconductor optical amplifier causes oscillation on the first optical path. The multi-mode interference 3-dB coupler crosses the first and optical paths in the gain medium of the semiconductor optical amplifier.
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Kikuchi Nobuhiro
Oohashi Hiromi
Shibata Yasuo
Thomori Yuichi
Hughes Deandra M
Irell & Manella LLP
Nippon Telegraph & Telephone Corporation
Yorks Ben J.
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