Dense Wavelength Division Multiplexing
|Dense Wavelength Division Multiplexing |
|CS496 Research Paper |
| |
| |
| |
|Name: Spiros Pilafas |
|6/21/2008 |
| |
Table of Contents
Introduction 3
The Challenges of Today's Telecommunications Network 4
Resolving the Capacity Crisis 6
How DWDM functions 7
DWDM Systems 8
Conclusion 10
Introduction
In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fiber by using different wavelengths (colours) of laser light to carry different signals. This allows for a multiplication in capacity, in addition to enabling bidirectional communications over one strand of fiber. "This is a form of frequency division multiplexing (FDM) but is commonly called wavelength division multiplexing."
DWDM uses up to 160 different colors (also known as lambdas or channels) to provide high-capacity bandwidth across an optical fiber network. Each lambda carries an individual optical signal providing the same bandwidth per channel (approximately 2.4G bit/sec with most of today's fiber) as a single light stream. Because each lambda is de-multiplexed at the end of the line, DWDM can be used to carry different types of data across the same line (for example, IP and ATM traffic).The term wavelength-division multiplexing is commonly applied to an optical carrier (which is typically described by its wavelength), whereas frequency-division multiplexing
|CS496 Research Paper |
| |
| |
| |
|Name: Spiros Pilafas |
|6/21/2008 |
| |
Table of Contents
Introduction 3
The Challenges of Today's Telecommunications Network 4
Resolving the Capacity Crisis 6
How DWDM functions 7
DWDM Systems 8
Conclusion 10
Introduction
In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fiber by using different wavelengths (colours) of laser light to carry different signals. This allows for a multiplication in capacity, in addition to enabling bidirectional communications over one strand of fiber. "This is a form of frequency division multiplexing (FDM) but is commonly called wavelength division multiplexing."
DWDM uses up to 160 different colors (also known as lambdas or channels) to provide high-capacity bandwidth across an optical fiber network. Each lambda carries an individual optical signal providing the same bandwidth per channel (approximately 2.4G bit/sec with most of today's fiber) as a single light stream. Because each lambda is de-multiplexed at the end of the line, DWDM can be used to carry different types of data across the same line (for example, IP and ATM traffic).The term wavelength-division multiplexing is commonly applied to an optical carrier (which is typically described by its wavelength), whereas frequency-division multiplexing