Optical amplifier
AssigneeNippon Telegraph and Telephone Corporation
InventorsYasuo Shibata, Nobuhiro Kikuchi, Hiromi Oohashi, Yuichi Thomori
Life of this patent
Estimating the term…
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.
Claims7
An optical amplifier characterized by comprising:
- a first optical path (2, 9, 10) which guides oscillation light;
- a second optical path (2, 8, 11) which guides signal light;
- oscillation means (4, 5) for causing oscillation on said first optical path;
- and
- crossing means (3, 6) for crossing said first optical path and said second optical path in a gain medium of said oscillation means.
5-10. (canceled)
An optical amplifier characterized by comprising:
- a first optical path (9, 10) which guides oscillation light;
- a second optical path (8, 11) which guides signal light;
- oscillation means (4, 5) for causing oscillation on said first optical path;
- crossing means (3, 6) for crossing said first optical path and said second optical path in a gain medium of said oscillation means;
- and
- intensity control means (7), arranged on said first optical path, for controlling an intensity of the oscillation light.
12-44. (canceled)
Dependencies are inferred from the claim text.