Recent progress in self-assembled quantum-dot optical devices for optical telecommunication: temperature-insensitive 10 Gb s−1 directly modulated lasers and 40 Gb s−1 signal-regenerative amplifiers

作者: M Sugawara , N Hatori , M Ishida , H Ebe , Y Arakawa

DOI: 10.1088/0022-3727/38/13/008

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摘要: This paper presents recent progress in the field of semiconductor lasers and optical amplifiers with InAs-based self-assembled quantum dots active region for telecommunication. Based on our design terms maximum bandwidth high-speed modulation p-type doping high temperature stability, we realized temperature-insensitive 10 Gb s−1 laser diodes a GaAs substrate at 1.3 µm. The output waveform maintained clear eye opening, average power extinction ratio without current adjustments from 20°C to 70°C. We developed ultrawide-band high-power 1.5 µm wavelength an InP substrate. amplifier showed ultrafast gain response under saturation, enabled signal regeneration 40 by suppressing '1'-level noise due beating between amplified spontaneous emission. present module polarization diversity enable stable polarization-insensitive performance, also, discuss prospects close stacking technique.

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