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US 8,472,109 B2Granted
Semiconductor optical amplifier and optical module
AssigneeFujitsu Limited
InventorsShinsuke Tanaka, Shigeaki Sekiguchi
Life of this patent
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Abstract
A semiconductor optical amplifier includes a semiconductor substrate; an optical waveguide that includes an active layer formed on the semiconductor substrate; and a wavelength selective reflection film that is formed on an end face where signal light is incident on the optical waveguide the wavelength selective reflection film allows transmission of the signal light, and reflects light of any wavelength other than the signal light.
Claims18
A semiconductor optical amplifier comprising:
- a semiconductor substrate;
- an optical waveguide that includes an active layer formed over the semiconductor substrate;
- and
- a wavelength selective reflection film that is formed on an end face of the optical waveguide, transmits signal light, and reflects a spontaneous emission generated by the active layer.
1 more element
A optical module comprising:
- a semiconductor optical amplifier including:
- a semiconductor substrate;
- an optical waveguide that includes an active layer formed on the semiconductor substrate;
- and
- a wavelength selective reflection film that is formed on an end face of the optical waveguide, transmits the signal light, and reflects a spontaneous emission generated by the active layer;
- an optical element that causes the signal light to be incident on the optical waveguide in the semiconductor optical amplifier;
- and
- an optical element that outputs the signal light emitted from the optical waveguide in the semiconductor optical amplifier.
5 more elements
Dependencies are inferred from the claim text.