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To: Wyätt Gwyön who wrote (688)	7/26/2000 1:29:05 AM
From: DukeCrow	Respond to of 2260

Jack, I was wondering where you got your info on Qtera using solitons. At least one person was given the impression by Qtera engineers that Qtera is not into solitons. From what I've read, I gathered that Qtera used Raman, solitons, and FEC to achieve their distances. Perhaps this trio is being tested for future ultra long haul products, while only Raman (maybe also FEC) is being used for their current products -- seems plausible. I think pumps will be here for a while. Solitons won't be able to do it alone; a combination of techniques will probably be used for ultra long haul. Ali

To: Wyätt Gwyön who wrote (688)	7/27/2000 12:29:57 AM
From: jack bittner	Read Replies (1) \| Respond to of 2260

MM, at the Baltimore OFC Qtera personnel, at least one of whom was an engineer, confirmed that Qtera uses soliton technology. I'd read it several times before, but I can't give you book and verse. A recent iteration of this fact is in The Gilder Report, July 2000. As to hard data I append a url that explains solitons. In about the 3rd or 4th drawing you see the pulse traveling without pumps. The mantra constantly intoned by soliton engineers is 2500-3000 miles without regeneration. Regeneration is, I take it, pumps. They'll still be needed for Raman amplification, but doesn't it stand to reason that IF solitons work, there'll be thousands less pumps. re solitons: www3.ncsu.edu I love the story of soliton discovery. about 1780 a gentleman-savant on horseback rode along a canal. observed one barge slam into another and saw a prong-shaped wave take off lickety-split seeming almost to gain speed as it traveled. he followed it for 6 miles, before it dissipated. first observed soliton. today, the initially administered shock causes a lightwave to keep its shape with minimal dispersion. about 20 years ago, bell labs went deep into it, and dismissed it as impractical. today some say the several colors leak into each other causing cross-talk; and Gilder (pushing HARD for avnx) says the virtually imaged phased array system is far better. i understand nt and glw are now proposing to exchange 100% of the stock of each other. nortel will value the glw stock it acquires at $144 billion, thus doubling the value of glw. and glw will value nt at $470 billion, thus doubling nortel. sometime next year the 2 companies will exchange names. if you ask Mr. Huber, he'll tell you corvis leads in Raman. qtera will say they do. and ciena is suing corvis, saying their founder infringed their Raman patents. truth is I lead in Raman.