Semiconductor optical amplifier having a non-uniform injection current density
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United States of America Patent
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Apr 15, 2008
Grant Date -
Nov 30, 2006
app pub date -
Feb 2, 2006
filing date -
Feb 2, 2005
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Abstract
A semiconductor optical amplifier (SOA) with efficient current injection is described. Injection current density is controlled to be higher in some areas and lower in others to provide, e.g., improved saturation power and/or noise figure. Controlled injection current can be accomplished by varying the resistivity of the current injection electrode. This, in turn, can be accomplished by patterning openings in the dielectric layer above the current injection metallization in a manner which varies the series resistance along the length of the device.
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