Semiconductor optical amplifying device, semiconductor...

Optical: systems and elements – Optical amplifier – Particular active medium

Reexamination Certificate

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C372S045010, C372S045011, C372S045012

Reexamination Certificate

active

07859745

ABSTRACT:
A polarization-independent SOA having an InP substrate used as a semiconductor substrate, and an active layer taking an MQW structure formed of a barrier layer made of GaInAs with tensile strain applied thereto and a well layer made of GaInNAs with no strain applied thereto alternately laminated in a plurality of layers, here, four layers of the well layer and five layers of the barrier layer are alternately laminated, is proposed.

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