Optical Feedback Tolerance of Quantum-Dot- and Quantum-Dash-Based Semiconductor Lasers Operating at 1.55 $\mu$m
Optical Feedback Tolerance of Quantum-Dot- and Quantum-Dash-Based Semiconductor Lasers Operating at 1.55 $\mu$m
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DOI：
10.1109/jstqe.2009.2013870
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发表时间：
2009-04
影响因子：
4.9
通讯作者：
S. Azouigui;B. Dagens;F. Lelarge;J. Provost;D. Make;O. Le Gouezigou;A. Accard;A. Martinez;K. Merghem;F. Grillot;O. Dehaese;R. Piron;S. Loualiche;Q. Zou;A. Ramdane
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文献类型：
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作者：
S. Azouigui;B. Dagens;F. Lelarge;J. Provost;D. Make;O. Le Gouezigou;A. Accard;A. Martinez;K. Merghem;F. Grillot;O. Dehaese;R. Piron;S. Loualiche;Q. Zou;A. Ramdane
本文报道了低维InAs/InP量子破折号和量子点为基础的半导体激光器的光反馈在1.55妈妈窗口的公差。为了这个目的，相干崩溃（CC）的发病实验确定和系统地研究作为不同的激光参数，如注入电流，微分增益，温度和光子寿命的函数。特别发现，对于这两种材料系统，CC的起始以与基于体或量子阱的器件类似的方式随着注入电流而增加。最重要的是，我们的实验表明，微分增益起着关键作用的光反馈容忍度。它确实示出，以确定不仅CC的发病范围，但也依赖于此阈值的温度和激光腔长。将工作温度从25 ℃提高到85 ℃，CC的起始值仅降低约3 dB，这可以通过该温度范围内差分增益的变化来解释。我们没有发现真正的3-D限制的量子点为基础的激光器和相同腔长的量子破折号设备，具有类似的差分增益的外部反射的容忍度的差异。我们的数据进行了初步分析，最后，在现有的模型的基础上。
This paper reports on the tolerance of low-dimensional InAs/InP quantum-dash- and quantum-dot-based semiconductor lasers to optical feedback in the 1.55 mum window. For this purpose, the onset of coherence collapse (CC) is experimentally determined and systematically investigated as a function of different laser parameters, such as the injection current, differential gain, temperature, and photon lifetime. It is in particular found that for both material systems the onset of CC increases with the injection current in a similar way to bulk or quantum-well-based devices. Of most importance, we experimentally show that the differential gain plays a key role in the optical feedback tolerance. It is indeed shown to determine not only the range of the onset of CC but also the dependence of this threshold both on the temperature and laser cavity length. Increasing the operating temperature from 25degC to 85degC leads to a decrease of the onset of CC by a factor of only ~3 dB, well accounted for by the variation of the differential gain in this temperature range. We find no difference in the tolerance to external reflections of a truly 3-D confined quantum-dot-based laser and a quantum dash device of the same cavity length, which have similar differential gains. A tentative analysis of our data is finally carried out, based on existing models.