Semiconductor optical amplifier
AssigneeNEC Corporation
InventorKiichi Hamamoto
Life of this patent
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Abstract
A semiconductor optical amplifier wherein poalization independent gain, high saturation input light intensity, and high saturation gain are obtained. The semiconductor optical amplifier of the present invention comprises a 1.times.1 multi mode interference (MMI) light waveguide region and a couple of single mode waveguide regions, each of which is connected with each end of the multi mode region. The length of the multi mode waveguide region is about 340 .mu.m and the length of the single mode waveguide regions is about 20 .mu.m. The width of the multi mode waveguide region is about 12 .mu.m while the widths of the single mode waveguide regions 2,3 are about 1 .mu.m.
Claims7
A polarization independent semiconductor optical amplifier wherein single mode light is outputted comprising;
- a light waveguide structure comprising,
- a multi mode interference waveguide region having a first and second end,
- a first single mode waveguide region connected to said first end of said multi mode interference waveguide region;
- and
- a second single mode waveguide region connected to said second end of said multi mode interference waveguide region.
Dependencies are inferred from the claim text.