Coherent Lightwave Communications Technology

✍ Scribed by Kiyoshi Nosu (auth.), Sadakuni Shimada PhD (eds.)

• Publisher: Springer Netherlands
• Year: 1995
• Tongue: English
• Leaves: 265
• Series: Telecommunications Technology and Applications Series
• Edition: 1
• Category: Library

✦ Synopsis

This book covers a wide range of technical issues relating to lightwave technologies using high coherence lightwaves. Electromagnetic wave communication started when the first wireless system was invented by Marconi in 1895. However, we had to wait about one hundred years to realize a similar technology in the lightwave frequency region. The invention of lasers in 1960 and two technology innovations in 1970 -low loss silica fiber and semiconductor lasers operating at room temperature - promoted the development of fiber-optic transmission systems. The deployment of high-speed long-haul fiber-optic transmission systems has led to the formation of domestic and international trunk networks. The installed fiber cables in local loop plants provide multimedia communication services including broadband video. However, present lightwave communication systems do not fully utilize the fruitful potential oflightwaves, namely the capacity of extremely high frequency electromagnetic information carrier waves. The frequency oflightwaves used for fiber-optic transmission is about 200 THz 14 (2 x 10 Hz), and the frequency bandwidth of the fiber low loss region is about 13 20 THz (2 x 10 Hz). Recent developments of narrow spectrum width semiconduc­ tor laser and planar optical waveguide devices offer us the possibilities for a new generation of lightwave-based communication systems. This book focuses on system aspects ofthe new generation lightwave communi­ cation technologies such as optical frequency division multiplexing and coherent detection. Chapter 1 overviews lightwave communication system technology.

✦ Table of Contents

Front Matter....Pages i-xiii
Introduction to coherent lightwave communications....Pages 1-11
Theory of optical coherent detection....Pages 13-41
Coherent transmission technologies....Pages 43-102
Optical filters and couplers....Pages 103-127
Optical frequency division multiplexing systems....Pages 129-188
Optical amplifiers for coherent transmission and optical FDM....Pages 189-215
System applications....Pages 217-240
Epilogue....Pages 241-249
Back Matter....Pages 251-258

✦ Subjects

Signal, Image and Speech Processing; Electrical Engineering