Optical SignaltoNoise Ratio and the QFactor （光信噪比和品质因数）.pdf

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Optical SignaltoNoise Ratio and the QFactor （光信噪比和品质因数）.pdf

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Optical SignaltoNoise Ratio and the QFactor （光信噪比和品质因数）

Application Note: HFAN-9.0.2 Rev.1; 04/08 Optical Signal-to-Noise Ratio and the Q-Factor in Fiber-Optic Communication Systems Functional Diagrams Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. AVAILABLE Optical Signal-to-Noise Ratio and the Q-Factor in Fiber-Optic Communication Systems 1 Introduction 2 2 vL 2 vH 2 = = i R or= = i R (3) SEL L SEH H The ratio of signal power to noise power at the R R receiver of a fiber-optic communication system has a direct impact on the system performance. Many where SE represents electrical signal power and the electrical engineers are familiar with signal-to-noise subscripts L and H represent the low or high power, ratio (SNR) concepts when re