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Technology Stocks : The *NEW* Frank Coluccio Technology Forum -- Ignore unavailable to you. Want to Upgrade?

To: gpowell who wrote (89)	6/7/2000 7:34:00 PM
From: Frank A. Coluccio	Read Replies (1) \| Respond to of 46821

gp, re: your solar cell researcher acquaintance "I'd say he was fabing these devices from about 1993 (or so) to 1999" Ouch.. and perhaps the science that was needed may soon be ready to support it? It wouldn't be the first time an early pursuit ran out of gas just in time to see a successor pick up the ball and score. Following up on Curt's observations re: multiple lambdas, Curt, I too had an initial thought that multiple windows (830, 1310, 1550) consisting of something less elaborate than a dense wavelength division scheme, would work. And like your statement implied, I assumed that data would be carried in the 1500 region, and power over the other two. But this puts a serious crimp in the provider's ability to inexpensively support dual lambda delivery to each unit. Although, I don't have even a coarse idea at this stage concerning the numbers to support such a scheme. Another approach which occurs to me is the use dedicated strands for each function, i.e., multiple as opposed to a single fiber. Running two paired fibers (perhaps one of them having the same characteristics of the type used for lighting street lamps that have been used in some power company commissioned pilots recently - anyone know the makeup of those) could be used on short runs to the node, allowing a scheme where one fiber is used for powering and the other for wdm-ized data. [NB: Data, in this context, covers all forms of information: voice, video, Internet, etc.] In doing so, you wouldn't exhaust the full spectral carrying capabilities of the bearer fiber across all windows almost entirely for supplying power. Such an approach is not too outrageous, given that the alternative that the service providers have used in their arguments against FTTH would call for running a aluminum-copper pair of wire for power, or running Optical Ground Wire (which is a hollowed-out metallic strand to the home, which has a pair of fibers inside) and all of the collateral powering in the field that these options would require. Dave, In considering radically overdriving the power lambda, what comes to mind is that this could result in crosstalk and non-linear distortion products that could, probably would, fold over into the lambda that's carrying the data, or cause backscatter which would lead to high returns and cross talk. I don't think that this is a tenable approach because of the variability of fiber lengths and their ensuing optical budgets, both of which must be taken into account individually, from one residence to the next. But I could be wrong. Just some additional ideas, some the same, to add to the growing list. FAC