Page 30 - Optical Communications Essentials

Basic Concepts of Communication Systems

20 Chapter One

The designations for SONET data rates range from OC-1 (51.84Mbps) to
OC-768 (768 OC-1 40Gbps) and beyond.
The designations for SDH data rates range from STM-1 (155.52Mbps) to
STM-256 (256 STM-1 40Gbps) and beyond.
■ For optical communications the ITU-T has defined the following six spectral
bands in the 1260- to 1675-nm range:
Original band (O-band): 1260 to 1360nm
Extended band (E-band): 1360 to 1460nm
Short band (S-band): 1460 to 1530nm
Conventional band (C-band): 1530 to 1565nm
Long band (L-band): 1565 to 1625nm
Ultralong band (U-band): 1625 to 1675nm
■ Computer-aided modeling and simulation software programs are essential
tools to predict how an optical communication component, link, or network
will function and perform. These programs are able to integrate component,
link, and network functions, thereby making the design process more effi-
cient, less expensive, and faster. One particular tool from VPIsystems, Inc. is
VPItransmissionMaker, which is a design and simulation tool for optical
devices, components, subsystems, and transmission systems. An abbreviated
version of this simulation module is available for noncommercial educational
use. This version is called VPIplayer and contains predefined component
and link configurations that allow interactive concept demonstrations.
VPIplayer can be downloaded from www.VPIphotonics.com. In addition, at
www.PhotonicsComm.com there are numerous examples of optical
communication components and links related to topics in this book that the
reader can download and simulate.

Further Reading

1. A. B. Carlson, Communication Systems, 4th ed., McGraw-Hill, Burr Ridge, Ill., 2002. This classic
book gives senior-level discussions of electrical communication systems.
2. B. A. Forouzan, Introduction to Data Communications and Networking, 2d ed., McGraw-Hill,
Burr Ridge, Ill., 2001. This book gives intermediate-level discussions of all aspects of communi-
cation systems.
3. W. Goralski, Optical Networking and WDM, McGraw-Hill, New York, 2001.
4. J. Hecht, City of Light, Oxford University Press, New York, 1999. This book gives an excellent
account of the history behind the development of optical fiber communication systems.
5. G. Keiser, Optical Fiber Communications, 3d ed., McGraw-Hill, Burr Ridge, Ill., 2000. This book
presents more advanced discussions and theoretical analyses of optical fiber component and sys-
tem performance material.
6. G. Keiser, Local Area Networks, 2d ed., McGraw-Hill, Burr Ridge, Ill., 2002. This book presents
topics related to all aspects of local-area communications.
7. R. Ramaswami and K. N. Sivarajan, Optical Networks, 2d ed., Morgan Kaufmann, San Francisco,
2002. This book presents more advanced discussions and theoretical analyses of optical net-
working material.
8. N. Thorsen, Fiber Optics and the Telecommunications Explosion, Prentice Hall, New York, 1998.

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