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Unformatted text preview: ----HW #5due 3/9/11 5PMno later than 3/11/11 5PM1. Consider a fiber communication system which operates at 1.6μmand uses a 20km-long fiberwith effective area of 50μm2, attenuation of 0.3 dB/km and Raman gain coefficient of10-13m /W. The overall losses without the fiber loss is 16dB and the receiver requires 0.02mWof power.a) What is the minimum power of the source (transmitter)?b) What is the power threshold for significant Raman effect?c) How many optical channels can we put into the system?2. Consider wave mixing (i.e. four wave mixing and sum frequency generation) with third ordernonlinearity (χ(3)) of three channels with frequenciesfx,fyandfz. This process can generate 22unique frequencies out of the possible 6x6x6 possible combinations.List all 22 uniquefrequencies. Notice negative frequencies do not count, e.g.fx+fy-fzis considered to be the sameasfz-fy-fx.3. In class we see that positive nonlinearity can compensate for anomalous dispersion and resultin generation of solitons. There is another combination of nonlinearity and dispersion that leadsin generation of solitons....
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This note was uploaded on 03/13/2011 for the course ELECTRICAL 605 taught by Professor Mugu during the Spring '08 term at University of Wisconsin - Fond du Lac.
- Spring '08