Abstract: The purpose of this application note is to show the relationship between the electrical and optical signal-to-noise ratio (SNR), and then introduce the Q-factor. The application note you have requested is available in Acrobat PDF format: APPLICATION NOTE 985: HFAN-09.0.2: Optical Signal-to-Noise Ratio and the Q-Factor in Fiber-Optic Communications Systems (PDF, 74kB) A free Acrobat PDF reader is available from: http://www.adobe.com/products/acrobat/readstep.html Related Parts   APP 985: Feb 28, 2002 MAX3273 +3.3V, 2.5Gbps Low-Power Laser Driver Full Data Sheet (PDF, 460kB) Free Samples MAX3735 2.7Gbps, Low-Power SFP Laser Drivers Full Data Sheet (PDF, 1.1MB) Free Samples MAX3869 +3.3V, 2.5Gbps SDH/SONET Laser Driver with Current Monitors and APC Full Data Sheet (PDF, 688kB) Free Samples Automatic Updates Would you like to be automatically notified when new application notes are published in your areas of interest? Sign up for EE-Mail™. We Want Your Feedback!   Download, PDF Format (74kB)  AN985, AN 985, APP985, Appnote985, Appnote 985