Fabry-Perot cavity type 1.5 μm InGaAsP BH-laser amplifier with small optical-mode confinement

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Abstract
A 1.5 μm InGaAsP buried-heterostructure laser amplifier having small optical-mode confinement was fabricated with a Fabry-Perot cavity configuration. Its signal gain, saturation output power and noise characteristics were studied and found to be superior to those for AlGaAs amplifiers, as a result of small optical-mode confinement.