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首页> 外文会议>Conference on enabling photonic technologies for aerospace applications >Assessment of amplitude and phase modulation performance of high-frequency subcarrier optical communication systems based on heterodyning of sideband injection-locked semiconductor lasers
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Assessment of amplitude and phase modulation performance of high-frequency subcarrier optical communication systems based on heterodyning of sideband injection-locked semiconductor lasers

机译：基于边带注射半导体激光器的外差的高频子载波光通信系统的幅度和相位调制性能的评估

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This paper present a theoretical assessment of the performance of subcarrier optical communication systems using sideband-injection locking and heterodyning. In this scheme, a master laser is strongly intensity modulated. The modulation sidebands of the master laser are injected into two slave lasers for the production of the subcarrier. One of the slave lasers is directly modulated to produce the amplitude and phase modulation on the subcarrier. First, using the Van der Pol equations for coupled oscillators, the small-signal response of the output power and phase of injection-locked semiconductor lasers was derived. Then the performances of the subcarrier optical communication systems based on amplitude modulation and phase modulation were assessed in terms of optimum power injection ratio and phase detuning between the master and slave lasers. For phase modulation, the performance was limited for two cases: lowest AM to PM conversion and highest PM modulation efficiency. The distortion and noise were calculated assuming coherent detection for phase modulation and envelope detection for amplitude modulation. Finally the signal to noise ratio is calculated and plotted.
机译：本文介绍了使用边带注射锁定和异差的子载波光通信系统的性能的理论评估。在该方案中，主激光器强度调制强度。主激光器的调制边带注入两个从激光器中，用于生产子载波。直接调制其中一个从激光器以在子载波上产生幅度和相位调制。首先，使用用于耦合振荡器的范德波极方程，推导出输出功率和进样半导体激光器的输出功率和相位的小信号响应。然后，根据主和从激光器之间的最佳功率注射比率和相位静脉来评估基于幅度调制和相位调制的子载波光通信系统的性能。对于相位调制，性能限制为两种情况：最低的AM至PM转换和最高PM调制效率。假设对幅度调制进行相位调制和包络检测的相干检测来计算变形和噪声。最后计算并绘制信号到噪声比。

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