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Direct modulation at 50 Gb/s of 1.3-µm InGaAlAs DFB lasers operating at up to 80°C was experimentally demonstrated by using a ridge-shaped buried heterostructure.
We report the fabrication and characterization of microcylinder quantum cascade lasers coupled with optical waveguides. Optical amplification and reduction of the threshold current have been observed as the current injected into the waveguide is increased.
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