channel spacing


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channel spacing

[′chan·əl ‚spās·iŋ]
(communications)
The difference in frequency between successive radio or television channels.

channel spacing

The amount of bandwidth allotted to each channel in a communications system that transmits multiple frequencies such as fiber optics. It is measured as the spacing between center frequencies (or wavelengths) of adjacent channels. See guard band.


Channel Spacing in Optical Fibers
The first 10 Gbps example with 50 GHz spacing has a slight signal overlap, but with 100 GHz, there is none. The first example provides more bandwidth, but the overlap could be enough to cause significant crosstalk. (Illustration courtesy of Jeff Hecht.)
References in periodicals archive ?
2, qualifying 18 wavelengths (channels) from 1270nm to 1610nm with a 20nm channel spacing.
These systems do not necessarily have to use either the 1550-nanometer window or narrow channel spacing.
Opnext's CO-DPSK technology offers the industry's best performance across all applications including metro, regional, and long haul, regardless of network configuration, network channel spacing or number of Reconfigurable Optical Add Drop Multiplexers (ROADMs).
The system incorporates Alcatel-Lucent OALC-5 cable, optimized with consistent submarine fibre (CSF), repeaters and the 1620 Light Manager (LM) submarine line terminal which is intended to house 10G/40G/100G wavelengths in the same platform, allowing seamless capacity raise on flexible grid for channel spacing exclusive of traffic disruption.
The TL1550-01 covers the entire C-band of 1530-1570 nm with 5 dBm output power, 100 GHz channel spacing, and 100 millisecond tuning speed, while the TL1550-02 covers half the C-band with the same channel spacing and switching speed, and with output power at 10 dBm.
Incorporating elements of the company's Adaptive-DPSK technology, the new MI 5000XM will support channel spacing as small as 25GHz.
The DCM-CB primarily addresses next-generation dense wave division multiplexing (DWDM) systems with increased transmission capacity which will benefit from the flexibility in channel spacing offered by the full C-band coverage.
The terra-Q(R) 50G-5 is a five-cavity optical filter chip capable of 50 GHz DWDM channel spacing.
With bandwidth that is wider than 42GHz, the solution efficiently enables 100GHz channel spacing.
today announced the development of a five-cavity optical filter chip capable of 25 GHz DWDM channel spacing, an innovation that surpasses previously existing technology and fulfills the promise of enabling significantly higher network performance at lower cost.
These devices have up to 44 channels and incorporate the same, patented stabilization and Photonic Integration Circuit (PIC) technology as the company's extensive line of 100GHz channel spacing athermal AWGs, which have been shipping in volume to customers around the world since 2004.