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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：基于边带注入锁定半导体激光器外差的高频子载波光通信系统的幅度和相位调制性能评估

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Abstract: 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. !8
机译：摘要：本文对使用边带注入锁定和外差技术的子载波光通信系统的性能进行了理论评估。在该方案中，主激光器被强强度调制。将主激光器的调制边带注入两个从激光器中，以产生副载波。从激光器之一被直接调制以在副载波上产生幅度和相位调制。首先，使用耦合振荡器的Van der Pol方程，推导了注入锁定半导体激光器的输出功率和相位的小信号响应。然后，根据最佳功率注入比和主激光器与从激光器之间的相位失谐，评估了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，性能受到两种情况的限制：最低的AM到PM转换和最高的PM调制效率。假设相干检测用于相位调制，而包络检测用于幅度调制，则计算失真和噪声。最后，计算并绘制信噪比。 ！8

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