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In this paper, a monolithic waveguide device, named IRIS, is presented. The device consists of an array of concatenated semiconductor optical amplifiers and saturable absorbers. We have fabricated the devices in InP-InGaAsP bulk gain material and we have experimentally investigated picosecond pulse transmission through these devices. Operated as an optical amplifier the IRIS devices show a decreased...
Amplification of picosecond pulses with greatly reduced amplified spontaneous emission compared to a standard semiconductor amplifier (up to 30dB) and a large increase in coherent spectral bandwidth is demonstrated in devices we have fabricated.
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