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DCM
DCM
C-LIGHT Dispersion Compensation Modules (DCMs) are integrated optical devices designed to correct signal distortion caused by chromatic dispersion in fiber-optic communication systems. Typically employing dispersion-compensating fiber (DCF), fiber Bragg gratings (FBGs), or electronic compensation techniques, DCMs counteract accumulated pulse broadening in long-haul transmission by introducing an opposite dispersion profile (e.g., negative dispersion). With compact designs, low insertion loss, and high compensation efficiency, DCMs support static or dynamic dispersion tuning and are widely used in high-speed networks (e.g., 100G/400G systems), wavelength-division multiplexing (WDM), and coherent communication systems. They enable flexible adaptation to varying transmission distances and channel conditions, serving as critical components for optimizing optical link performance and enhancing bandwidth capacity.
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Product Details

Dispersion Compensation Module for High-Speed Long-Haul Optical Networks

Form Factor
Part No.DistanceWavelengthSizeOptical Fiber
NoteNote
20km Dispersion CompensationCL15DCM201U20kmC-BAND1UN/AN/AN/A
40km Dispersion CompensationCL15DCM401U40kmC-BAND1UN/AN/AN/A
60km Dispersion CompensationCL15DCM601U60kmC-BAND1UN/AN/AN/A
80km Dispersion CompensationCL15DCM801U80kmC-BAND1UN/AN/AN/A
100km Dispersion CompensationCL15DCM1001U100kmC-BAND1UN/AN/AN/A
120km Dispersion CompensationCL15DCM1201U120kmC-BAND1UN/AN/AN/A

Dispersion Compensation Modules (DCMs) are integrated optical devices designed to correct chromatic dispersion and reduce signal distortion in fiber-optic communication systems. By introducing an opposite dispersion profile, DCMs compensate for accumulated pulse broadening and help maintain signal quality across long-distance optical links. The C-LIGHT DCM series supports C-band transmission with 20km to 120km dispersion compensation options in a compact 1U form factor.

Key Features of Dispersion Compensation Module

Effective Dispersion Compensation

DCM introduces an opposite dispersion profile to compensate for chromatic dispersion accumulated during optical fiber transmission and reduce signal distortion.

C-Band Optical Transmission

The DCM series is designed for C-band optical communication systems and can be integrated into WDM and long-distance transmission networks.

Multiple Compensation Distances

20km, 40km, 60km, 80km, 100km, and 120km compensation options provide flexibility for different transmission link requirements.

Compact 1U Form Factor

The 1U rack design allows the DCM to be integrated into standard optical transmission equipment and centralized network racks.

Dispersion Compensation Module Configurations

20km Compensation

CL15DCM201U provides 20km dispersion compensation for C-band optical transmission systems requiring a moderate level of dispersion correction.

40km and 60km Compensation

CL15DCM401U and CL15DCM601U provide 40km and 60km compensation options for optical links with different accumulated dispersion levels.

80km and 100km Compensation

CL15DCM801U and CL15DCM1001U provide higher compensation distances for longer transmission spans and increased dispersion management requirements.

120km Compensation

CL15DCM1201U provides the highest listed compensation distance in the series for optical systems requiring substantial dispersion correction.

How Dispersion Compensation Modules Work

Chromatic Dispersion Accumulation

Different wavelength components of an optical signal can travel at different velocities through fiber, causing pulse broadening as transmission distance increases.

Opposite Dispersion Profile

The DCM introduces dispersion with an opposite characteristic to the accumulated fiber dispersion, helping restore the timing relationship between signal components.

Signal Distortion Reduction

By balancing accumulated dispersion, the module helps reduce pulse spreading and preserve signal integrity across long optical transmission paths.

High-Speed Network Support

Effective dispersion management is important for high-speed optical systems where signal distortion can increasingly affect transmission performance over long distances.

Dispersion Compensation Module Applications

Long-Haul Optical Networks

DCMs can be deployed in long-distance fiber links to compensate for accumulated chromatic dispersion and maintain optical transmission performance.

WDM Transmission Systems

The C-band DCM series is suitable for WDM systems where multiple optical channels require effective dispersion management over extended transmission distances.

High-Speed Optical Networks

DCMs support high-speed transmission systems by helping reduce dispersion-related signal distortion and maintain link performance.

Coherent Optical Systems

Dispersion compensation modules can be used as part of optical link engineering where chromatic dispersion needs to be managed across transmission paths.

DCM vs. DCF

Dispersion Compensation Module

DCM is an integrated optical module that packages the dispersion compensation function into a deployable unit for easier integration into transmission equipment.

Dispersion-Compensating Fiber

DCF is the specialized optical fiber used to provide negative dispersion. It can serve as the dispersion compensation medium within a module or optical transmission system.

Deployment Flexibility

A packaged DCM provides a more convenient rack-level solution when dispersion compensation needs to be incorporated into an existing optical network.

System-Level Dispersion Management

Both DCM and DCF are used to manage chromatic dispersion, but DCM provides an integrated module format for practical network deployment.

Choosing the Right DCM Compensation Distance

20km to 60km

These options are suitable for optical systems requiring moderate dispersion compensation based on the accumulated dispersion of the transmission fiber.

80km to 120km

Higher compensation distances are available for longer transmission spans where greater accumulated chromatic dispersion needs to be balanced.

FAQ About Dispersion Compensation Module

Q1. What is a Dispersion Compensation Module?

A Dispersion Compensation Module is an integrated optical device used to compensate for chromatic dispersion and reduce signal distortion in fiber-optic transmission systems.

Q2. What wavelength band does the C-LIGHT DCM support?

The listed C-LIGHT DCM series is designed for C-band optical transmission systems.

Q3. What compensation distances are available?

The DCM series provides 20km, 40km, 60km, 80km, 100km, and 120km dispersion compensation options.

Q4. What is the form factor of the DCM?

All listed DCM models use a 1U form factor for rack-based optical network deployment.

Q5. What is the difference between DCM and DCF?

DCF is a dispersion-compensating fiber that provides the required dispersion characteristics, while DCM is an integrated module designed to provide dispersion compensation as a deployable optical component.

Dispersion Compensation Module for Reliable Optical Transmission

C-LIGHT Dispersion Compensation Modules provide integrated chromatic dispersion management for C-band optical networks. With 20km to 120km compensation options and a compact 1U form factor, the DCM series supports long-haul, WDM, and high-speed optical transmission systems requiring controlled dispersion performance.

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Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.

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