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 We Want Your Feedback! 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™. More Information   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)   Download, PDF Format (74kB)  AN985, AN 985, APP985, Appnote985, Appnote 985