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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Recent progress in self-assembled quantum-dot optical devices for optical telecommunication: temperature-insensitive 10 Gbs(-1) directly modulated lasers and 40Gbs(-1) signal-regenerative amplifiers
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Recent progress in self-assembled quantum-dot optical devices for optical telecommunication: temperature-insensitive 10 Gbs(-1) directly modulated lasers and 40Gbs(-1) signal-regenerative amplifiers

机译：用于光通信的自组装量子点光学设备的最新进展：温度不敏感的10 Gbs（-1）直接调制激光器和40Gbs（-1）信号再生放大器

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This paper presents recent progress in the field of semiconductor lasers and optical amplifiers with InAs-based self-assembled quantum dots in the active region for optical telecommunication. Based on our design in terms of the maximum bandwidth for high-speed modulation and p-type doping in quantum dots for high temperature stability, we realized temperature-insensitive 10 Gb s(-1) laser diodes on a GaAs substrate at 1.3 mu m. The output waveform at 10 Gb s(-1) maintained a clear eye opening, average output power and extinction ratio without current adjustments from 20 degrees C to 70 degrees C. We developed ultrawide-band high-power amplifiers in the 1.5 mu m wavelength region on an InP substrate. The amplifier showed ultrafast gain response under gain saturation, and enabled signal regeneration at 40 Gb s(-1) by suppressing the '1'-level noise due to the beating between the signal and amplified spontaneous emission. We present our amplifier module with polarization diversity to enable a stable polarization-insensitive performance, and also, discuss prospects for polarization-insensitive quantum dots by the close stacking technique.
机译：本文介绍了在半导体激光器和光放大器领域中的最新进展，这些激光器在用于光通信的有源区中具有基于InAs的自组装量子点。根据我们在高速调制的最大带宽和量子点中的p型掺杂以实现高温稳定性方面的设计，我们在1.3μm的GaAs衬底上实现了对温度不敏感的10 Gb s（-1）激光二极管。 10 Gb s（-1）时的输出波形保持清晰的睁眼，平均输出功率和消光比，而无需将电流从20摄氏度调整到70摄氏度。我们开发了1.5微米波长的超宽带大功率放大器InP衬底上的区域。该放大器在增益饱和下表现出超快的增益响应，并通过抑制信号和放大的自发发射之间的跳动而抑制了“ 1”级噪声，从而在40 Gb s（-1）下实现了信号再生。我们为我们的放大器模块提供极化分集，以实现稳定的极化不敏感性能，并通过紧密堆叠技术讨论极化不敏感量子点的前景。

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