WDM


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WDM

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

WDM

wavelength division multiplexing
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

WDM

(1) (Wavelength Division Multiplexing) A communications technology that transmits several wavelengths of light (lambdas) simultaneously over a single optical fiber. Using multiple lasers, each signal travels within its unique color band modulated by the data.

WDM has dramatically increased the carrying capacity of the fiber infrastructure of the telephone companies and other carriers. Also known as "dense WDM" (DWDM), vendors have introduced systems that can support hundreds of wavelengths, each carrying 10 Gbps. That means terabits of data per second can travel over one optical strand, thinner than a human hair. Contrast with TDM. See CWDM and fiber optics glossary. See also FDM.

(2) (Win32 Driver Model) A device driver architecture from Microsoft that consolidates drivers for Windows 95/98 and subsequent versions of Windows. WDM allows a hardware vendor to write one driver for its peripheral device that works with all 32-bit versions of Windows. See driver.
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References in periodicals archive ?
Chung, "10-Gb/s operation of RSOA for WDM PON", IEEE Photonics Technology Letters, vol.
A problem analysis of RSOA-based optical access
Unlike conventional OXCs in WDM or EON networks, the developed GRE node suffers from a intra-node routing limitation due to the use of coarser granular spectrum selective.
Spectrum Utilization Efficiency of Elastic Optical Networks Utilizing Coarse Granular Routing
This is because PB-ILP has more path choices than LB-ILP under the transparent lightpath length limit in WDM networks.
Energy-Efficient Traffic Grooming in Bandwidth Constrained IP over WDM Networks
Authors in [7] reveal that the applying unequally channel spacing in proper configuration provides increasing the SE of WDM backbone network with MLRs and MMFs.
Investigation of influence of mixed configurations on performance of WDM-PON
So we have integrated FBG and EDFA in WDM optical transmission system [12] as shown in Figure 10.
Chromatic Dispersion Compensation Effect Performance Enhancements Using FBG and EDFA-Wavelength Division Multiplexing Optical Transmission System
Alliance for Water Efficiency President and chief executive Mary Ann Dickinson cited the need for effective and sustained information and education efforts promoting WDM so people can better understand and appreciate need to implement this water-saving strategy.
Water strategy offers boost for building communities' resilience
DM WDM is Central and Eastern a leading small-cap investment bank in Europe that has been listed on the Warsaw Stock Exchange since 2007.
DM WDM investment bank, Quark Ventures report progress with agreement with Massachusetts-based client
In another PtP GE private line field trial with another Chinese operator, the WDM PON system is deployed to serve SMBs in an industrial park.
Huawei to demo point-to-point WDM PON solution
"The MS9740A features a WDM filter analysis function supporting group display for optical bandpass filters, such as WSS and WDM filter devices.
100G+ transmission speeds dictate global solutions
Simulation results have shown that AP-DCDM- WDM systems have greater tolerance to dispersion and have better receiver sensitivity than other conventional techniques.
EFFECT OF FOUR WAVE MIXING ON AP-DCDM-WDM FIBER OPTIC SYSTEM AT DIFFERENT CHANNEL SPACING
Director Lynn Beasley bought the family-run company from her employer 20 years ago and has now taken the next step forward, after the Team Valley Trading Estate base that WDM had rented for the past 10 years came on the market.
Mailing firm buys base to secure future growth
In using purely TDM PON systems, speed can be the advantage obtained, but there is a limitation as to the number of users reached and also there is a limitation as to the amount of traffic a given user can access; this is because TDM uses one wavelength for downstream and another wavelength for the upstream communication limiting the optimum bandwidth for a given user, and thus the bandwidth for that particular single fibre is wasted, while on the other hand specific wavelength assignment for a given customer can be used in WDM PON which is an ideal and clear way of increasing capacity.
Effects of modulation techniques (Manchester code, NRZ or RZ) on the operation of hybrid WDM/TDM passive optical networks

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