 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Natural Science Forum / Physics / Optics / March 2005Max Transmit distance over LEAF fiber?
What is the max transmission distance that can be acheived over Corning LEAF fiber? Say using a 45 mb/s data stream or at some SONET rate like OC-3. And with only a single wavelength on the fiber. Any tips or references to help understand this are appreciated! Calculating the max. transmission distance in an optical fiber is one of the basic issues in optical technology. Take into acount that pulses broaden as they are transmitted through the fiber. Take this broading roughly as deltaT=fiber length * fiber dispersion * source linewidth. You must make sure that deltaT is less than, let's say, a little fraction of the bit time so as to avoid intersymbol interference that would close the digital eye diagram. So, for a correct answer to your question it is compulsory to know the linewidth of your laser as well as the max. tolerable intersymbol interference (bit error rate) you can tolerate. Regards, Mikel Posted at: http://www.groupsrv.com it could be designed for max distance....so whatever laser worked best. the BER would be say 10-9. How far would that go? > Calculating the max. transmission distance in an optical fiber is one > of the basic issues in optical technology. Take into acount that [quoted text clipped - 16 lines] > ** SPEED ** RETENTION ** COMPLETION ** ANONYMITY ** > ---------------------------------------------------------- I should assume you're transmitting digital baseband signals, shouldn't I?, and that you have the money to buy the best laser you might find in the market, haven't you? :wink: Mikel Posted at: http://www.groupsrv.com YES. those are good assumptions. I want to build a purpose built system with low bandwidth or data capacity needs and ultra longhaul. It need be the only carrier on the fiber so all power can be put in that carrier. I think it will be cheaper, including design cost then to buy commercial telco gear that is built to push max bits throught the fiber. I dont have that contraint...but the few sites with repeaters or regens the better. So im interested in how far I can got without repeat or regen becuase Im hoping there is a cheaper way then use off the shelve telco gear. any thoughts? >I should assume you're transmitting digital baseband signals, > shouldn't I?, and that you have the money to buy the best laser you [quoted text clipped - 7 lines] > ** SPEED ** RETENTION ** COMPLETION ** ANONYMITY ** > ---------------------------------------------------------- understood ! Let me see what would be a realistic value... Mikel Posted at: http://www.groupsrv.com |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.