lect27 - FIBER OPTICS 100 μm/140 μm 200/240 50/125...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: FIBER OPTICS 100 μm/140 μm 200/240 50/125 62.5/125 85/125 9/125 9/125 Dimension of typical fibers Milestones of undersea cables 1866 First undersea telegraph cables North America to Europe 17 words/minute, $5/word 1956 First undersea telephone cables (coax) 48 phone circuits 1983 4200 voice circuits BW: ~ 10 +1 MHz Repeater spacing ~ 9.5 km 1988-89 First undersea fiber optics cable Three fiber pairs, 280 Mb/s @1.3 m Upgraded to 2.5 Gb/s @ 1.55 m Repeater spacing: ~ 50 km Erbium doped fiber amplifiers 0.35 Gm, 350,000 km UNDERSEA CABLES TransAtlantic cables: 6000 to 7500 km (~ 2002) Trans Pacific cables: 8000 km to 10000 km (as of 2002) BASIC PRINCIPLE Light guided by total internal reflection Low index cladding High index core Light acceptance cone GLASS ROD IN AIR FIBER HISTORY 1854: John Tyndall guides light in a jet of water flowing from a tank 1930: Heinrich Lamm shows first image transmission through fiber bundle 1960: Lawrence Curtiss made first glass clad fiber (1000 db/km loss) 1970: Corning Glass Works demonstrates 20 dB/km @ 633 nm 1988: First transatlantic optical cable (TAT-8) 1996: First demonstration of photonic crystal fibers TYPICAL TELECOM FIBER...
View Full Document

This note was uploaded on 02/12/2012 for the course ECE 414 taught by Professor Alenxendra during the Spring '11 term at Purdue.

Page1 / 32

lect27 - FIBER OPTICS 100 μm/140 μm 200/240 50/125...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online