The first underwater telegraph cable was laid between England and the Continent in 1850, with the cable from America to Europe following in 1858. But for the next century, improvements in transcontinental communication came slowly. By the 1940s, Americans could talk to Europeans via a static-plagued radiophone. By the early 1980s, satellite transmissions had improved conversation clarity significantly, but callers were still annoyed by delay and feedback. Those who have made a transcontinental call recently, however, know that the wonders of fiber optics have made it possible to hear a pin drop on the Champs-Elysees. In this deft history, Hecht, a writer for the British weekly New Scientist, shows how the illuminated fountains that thrilled crowds at the great 19th-century exhibitions convinced scientists that light can be guided along narrow tubes. In our century, scientists used these tubes of light first to look inside the human body and then, as the physics of wave transmission were better understood, to transmit audio and optical information. Hecht explains which technological advances have made fiber optics the backbone of our telephone system in the last 10-15 years and how everyday applications should increase exponentially once fibers are connected directly to our homes. Already optical fibers are used in many surprising ways: guiding laser light in life-saving surgery; embedded in concrete to monitor stress in bridges; wound into gyroscopes to improve airline safety. Hecht's latter chapters are bogged down slightly with details that will mainly interest readers working in related areas, but general science buffs should enjoy his account of the development of the technology that will change our lives in many unexpected ways in the next quarter century. (Feb.)
