What is optical networking?

Question

i have to write an approximately 800 word assignment on optical networking covering mainly these three points:

1. SONET standard

2. dense wavelength division multiplexing

3. performance and design consideration

i have already tried wikipedia and google, so if you can give any specific sites, it would be great

Answer 1

http://news.cnet.com/Optical-networking-...

http://www.iec.org/online/tutorials/opt_...