Midterm

Midterm - UNIVERSITY OF CALIFORNIA Santa Barbara Department...

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UNIVERSITY OF CALIFORNIA Santa Barbara Department of Electrical and Computer Engineering ECE 135 MIDTERM Spring 2010 During this exam you can refer to one 8.5"x11" sheet of notes only. In your answers make your reasoning very clear and show your work explicitly. Remember that I can grade your papers based only on what you have written, not based on what you think that you implied. Good luck. 1.(25%) Answer the following concisely using only words formed into complete sentences and appropriate figures with clearly labeled axes where needed. (a)(2%) Describe what a mode is. What are the properties of a mode? (b)(2%) Give examples of two quantities that travel at phase velocity. (c)(2%) Give examples of two quantities that travel at group velocity. (d)(2%) What is the origin of dispersion? (e)(2%) Identify types of dispersion. (f)(2%) What different physical loss mechanisms contribute to fiber loss? (g)(3%) Draw a schematic indicating the variation of fiber loss as a function of wavelength and indicate the trends of different loss mechanisms on this plot. What is the minimum loss coefficient and at what wavelength we observe this value?
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This note was uploaded on 01/28/2012 for the course ECE 135 taught by Professor Dagli during the Spring '08 term at UCSB.

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Midterm - UNIVERSITY OF CALIFORNIA Santa Barbara Department...

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