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Date: Fri, 30 May 2003 00:07:28 +0200 (CEST) From: Mikael Abrahamsson <swmike@swm.pp.se> To: "Nanog@Merit. Edu" <nanog@merit.edu> In-Reply-To: <3ED677AA.3050209@aol.net> Errors-To: owner-nanog-outgoing@merit.edu On Thu, 29 May 2003, N. Richard Solis wrote: > effects of high laser power on glass fibers. At last guess, that limit > was about +17dBm into standard SMF-28. Couple this with a typical > receive sensitivity of -12dBm for 10gpbs signals and you've for about > 29dB of link margin to work with. Assuming of course that there aren't Interesting. I have GigE stuff that have a receive sensitivity of -29dB, if we could launch with +17dB somehow (this equipment only launches with typical +4dB), things would get interesting. With a .2 dB per km (I have seen this on newer fiber) that'll actually put the length of fiber into the 200+km territory (230km according to my math). Still, it's not 200 miles, and the amp to amplify +5 into +17 would not be cheap, probably at least 10 times more expensive than a regen/amp to put in the middle to go from -29 into +5 again. -- Mikael Abrahamsson email: swmike@swm.pp.se
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