DCM-pc chromatic dispersion compensator
 

State of the Art

Proximion offers the world's only FBG-based continuous Dispersion Compensation Modules (DCMs). Tens of thousands of units are deployed in networks worldwide, today compensating for dispersion in links that spans more than six laps around the globe. 

 

 

Best of Both Worlds

Our products are the only ones that combine all the benefits of the FBG and DCF technology. Taking advantage of both full band and channel plan independent compensation.  

 
 

Low insertion loss dcm
 
no residual dispersion with perfect slope matching
 
no latency with fbg based dispersion compensation

Ultra Low Loss

The low loss enables a higher degree of freedom when optimizing your system with respect to reach and performance. In longer spans it is a major cost saver reducing the amount of amplification needed with a factor of 3 to 5 compared to DCF.

 

 

Perfect Slope Match

Our FBG based DCMs can be designed to perfectly mimic the dispersion slope characteristic of any given fiber type. We guarantee a residual dispersion of less than 2% compared to a value often higher than 10% with DCF. Low residual dispersion is crucial when you decide to migrate to higher bit rates.

 

No Latency

With virtually zero latency, our FBG based DCMs can reduce your link latency up to 10 to 20 percent. It is perfectly suited for high-speed networks supporting low latency services. 

 
 

Continuous Compensation

No matter what your link dispersion looks like there is a solution with our continuous FBG DCMs. So whether you are using G.652 or G.655 fiber, or have a full-band terrestrial or a banded submarine solution you will  have the possibility to have zero dispersion over all your channels and even in-between channels. The continuous solution also allows for seamless upgrade to higher bit rate, channel count or even change of channel plan.

 
 
continuous dispersion compensation with fbg-based dcms
 
 
 
Small form factor chromatic dispersion compensators
 

Space Efficient

Small form factor but full-band dispersion compensation. The FBG design enables an immense space saving  resulting in substantial OPEX and CAPEX related savings. 

 
 
 

Zero Nonlinear Effects

In a DWDM environment, non-linear effects limit the number of wavelengths per fiber and/or channel spacing. By using FBG DCMs with zero non-linearities you don't add any limitations to your system as is the case using DCF. FBG DCMs have actually proved to even decrease the problem with non-linearities in coherent systems.

Non-linearities is the #1 parameter, just before dispersion, that determines the capacity limit of a long haul DWDM system.

Professor Roberto Gaudino, Politecnico di Torino, Italy
 


0 dBm

something2.png


10 dBm


13 dBm

Eye diagrams of received signals for several received signal powers.

 
 

illustration of separation of wavelengths

About Dispersion 

The phenomenon that white light can be separated into different colors is named dispersion. Dispersion causes pulses to spread in optical fibers, degrading signals over long distances and ultimately resulting in bit errors.

 
 
 

Choose Your DCM 

Img Placeholder Smaller Canvas.png

DCM Type

Wavelength Range

Usable
Bandwidth

Dispersion Slope Matching

Compensation
Length

Insertion Loss

Latency 

Dimension 

Non-Linearities

Tech Spec

continuous band chromatic dispersion compensator

CB

C-band or L-band

OWR


G.652, G.655 or Custom

10-140km G.652 40-480km G.655

3.7dB

<150ns

198x212x223mm

None

cb.pdf

chromatic dispersion compensator for submarine links

HDC

C-band

850GHz, 450GHz, Custom

Custom


Custom
≈600km G.652

3.7dB

<100ns

198x212x223mm

None

hdc.pdf

slope compensator for handling residual chromatic dispersion

SLC

C-band

Custom


Custom


 Custom


7.0dB 

<180ns

447x246x44mm

None

slc.pdf

small form factor patchcord dispersion compensator

PC

C-band or L-band

60GHz, 760GHz, Custom

G.652, G.655 or Custom

6-80km G.652
25-350km G.655

2.5dB

<25ns

12x110x11mm

None

pc.pdf

channelized fbg-based dispersion compensator

ITU

C-band

40GHz


G.652


10-100km G.652


3.0dB

45ns

28x180x15mm

None

itu.pdf

 

 

Customize Your DCM

Design your DCM perfectly tailored to your specific needs. Any dispersion, any bandwidth, any dispersion slope. This unique product offering originates from our ability to manufacture FBGs that are more than 10 times longer than our closest competitor. So do as 9 of the worlds 12 Tier-1 system vendors and provide us your dispersion specification. 

 
 
tailored chromatic dispersion compensator
 

improved coherent systems with fbg-based dispersion compensation
 
 

Improved Coherent Systems

Continuous DCMs have the potential to improve long haul coherent systems from an economical as well as a technical perspective. Key benefits are: Reduced Power Consumption, Reduced Latency and Reduced Complexity.

 
ImpCoSys1.png
 
 
 

Mixed 10G & 100G

When adding 100G coherent channels to legacy 10G networks it is a major risk that the new 100G channels are distorted to the level that signal transmission is impossible. Our technology makes it possible to upgrade any dispersion compensated network to a mixed +100G coherent network. Amongst others AARNet has deployed Proximion's DCMs on 1,600 km network that has Cisco hardware.

Proximion’s unique DCMs improved performance and reduced cost in our recent 100G coherent upgrade.
— Tom Newlands, Network Solutions Engineer, AARNet
 
 

 
principle of chirped fbg to compensate for chromatic dispersion
 

How Our FBG 
Technology Works 

Dispersion compensation utilizing FBGs is based on the introduction of wavelength‐specific time delays through the use of a precisely chirped FBG. Our ultra-long FBGs is inscribed with our versatile and proprietary grating writing technique that gives us unparalleled possibilities.