November 2007
Intermediate to advanced
736 pages
46h 32m
English
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OPTICAL FIBRE CABLE
An optical fibre cable consists of a glass core that is completely surrounded by glass cladding (Fig. 41.4). The core performs the function of transmitting the light waves, while the purpose of the cladding is to minimise surface losses and to guide the light waves. The glass used for both the core and the cladding must be of very high purity since any impurities present will cause some scattering of light to occur. Two types of glass are commonly employed : silica-based glass (silica with some added oxide) and multi component glass (e.g. sodium borosilicate).
Some new optic fibres do not use glass at all, but special types of plastic; these are usually cheaper to make than very pure glass but introduce greater attenuation. ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.