Semiconductor amplifier with low polariation-dependent gain
AssigneeNEC Laboratories America, Inc.
InventorsFatih YAMAN, Shinsuke FUJISAWA, Eduardo Mateo RODRIGUEZ, Kohei NAKAMURA, Takanori INOUE, Yoshihisa INADA, Takaaki OGATA
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Abstract
Aspects of the present disclosure describe systems, methods and structures for providing semiconductor amplifiers exhibiting a low polarization-dependent gain.
Claims11
A semiconductor optical amplifier module exhibiting low polarization dependent gain characteristics, said module comprising:
- an input port for receiving a dual-polarization signal and an output port for outputting an amplified dual-polarization signal;
- an optical circulator in optical communication with the input port, the output port, and a polarization beam splitter/combiner, said circulator configured to direct optical signals between the input port, the output port, and the polarization beam splitter/combiner;
- and
- a pair of semiconductor optical amplifiers, each having a first port and a second port, the first port of each optically connected to the polarization beam splitter combiner, and the second port of each optically connected to one another.
An improved optical amplifier module exhibiting low polarization dependent gain comprising:
- an input port for receiving a dual-polarization signal and an output port for outputting an amplified dual-polarization signal;
- an optical circulator in optical communication with the input port, the output port, and a dual-polarization semiconductor optical amplifier, said circulator configured to direct optical signals between the input port, the output port, and the dual-polarization semiconductor optical amplifier;
- the dual-polarization semiconductor optical amplifier having a first port and a second port, the first port optically connected to the optical circulator, the second port optically connected to a Faraday mirror;
- and
- the Faraday mirror.
A method of operating a semiconductor optical amplifier module having an input port for receiving dual-polarization optical signals and an output port for outputting amplified, dual-polarization signals, the METHOD CHARACTERIZED IN THAT:
- the dual-polarization optical signals are directed though a semiconductor optical amplifier at least twice, at least once in a first direction, and at least once in a second direction, wherein the second direction is opposite to the first direction.
Dependencies are inferred from the claim text.