Optimization of analog optical link performance: First minimize the noise figure
Optimization of analog optical link performance: First minimize the noise figure
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模拟光链路性能优化：首先最小化噪声系数
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
C. Cox
中科院分区：
文献类型：
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作者：
E. Ackerman;C. Cox
作者收集了在1 MHz到100 GHz范围内工作的模拟光链路的噪声系数和无杂散动态范围数据。我们观察到，在大多数情况下，增加动态范围的努力也会导致噪声系数不受欢迎的增加。如果市场上有足够高动态范围的宽带前置放大器，这将不会有太大的问题。然而，使用商业放大器宣传的性能，我们发现，在大多数情况下，模拟光链路的前置放大以获得可接受的噪声系数，将动态范围降低到低于没有前置放大器的低噪声系数链路的水平。因此，我们得出结论，在没有前置放大器的情况下将噪声系数最小化是非常重要的，并且只有在实现了放大器和/或光链路技术的技术水平的重大进步之后，对链路进行线性化的努力才会产生真正的系统改进。
The authors have amassed the reported measured noise figure and spurious-free dynamic range data for analog optical links operating between 1 MHz and 100 GHz. We have observed that, in most cases, efforts to increase the dynamic range have resulted in an undesired increase in the noise figure as well. This would not be unduly problematic if broadband preamplifiers with sufficiently high dynamic range were commercially available. Using the advertised performance of commercial amplifiers, however, we find that pre-amplification of analog optical links to achieve acceptable noise figure in most cases reduces the dynamic range to a level below that of links that have low noise figure without a pre-amplifier. We conclude, therefore, that minimization of noise figure without a preamplifier is of paramount importance, and efforts to “linearize” links will yield true system improvements only after significant advancements in the state of the art of amplifier and/or optical link technology are achieved.