DCF

[Heitor GalvaoParticipant]

Good day, please can you tell me how to configure references the parameters of a DCF according to this network in annex

Attachments:

1. Paleta-Heitor-2.1-10-Gbps1.osd

[Heitor GalvaoParticipant]

Want to better understand the parameters of the DCF, can someone help?

[Heitor GalvaoParticipant]

A brief explanation of SMF and DCF, someone has good books about SMF and DCF?

[Heitor GalvaoParticipant]

Articles also please

[Heitor GalvaoParticipant]

I didn’t find any topic here on the forum about SMF, so about DCF

[Damian MarekParticipant]

An easy way to do it is to match the lengths of the fibers and then set the dispersion to the opposite (negative) of the transmission link. The amount of broadening a pulse experiences is a linear expression involving length and also D. So you could half the length and double the dispersion parameter. If you want to include third order dispersion and multiple frequencies (dispersion is a function of wavelength) it can be a lot more complicated.

[Heitor GalvaoParticipant]

What are the correct values of variables such as DCF’s area effectively?

+1

[Damian MarekParticipant]

The effective area parameter is used in our simulation to model nonlinear effects (not dispersion), so you should use the effective area that is attributed to the fiber that you are simulating. A common value and the default we use is 80 um^2.

In a real life scenario a DCF might have a different value since the waveguide might have a different structure (smaller or bigger). You can use OptiFiber to calculate its effective area or you can use the link below to read about a similar topic. I made a matlab/Optisystem file that demonstrates how to calculate the effective area from a spatial distribution.

System Power Penalty and Link Margin

Regards

[Heitor GalvaoParticipant]

Thanks Damian, I’ll check

[Josh WeberParticipant]

Hello. This is regarding post #14698 above.

Damian, you mentioned that “The effective area parameter is used in our simulation to model nonlinear effects (not dispersion),…”. Is there an alternative way to take effective area into account to model modal dispersion in the simulation?

Thanks.

[Damian MarekParticipant]

Yes, but you would need to use a different component. The Optical Fiber component models a singlemode fiber.

You can try either the Linear Multimode Fiber or one of the spatial models in the Multimode Library/Optical Fibers folder.

The Linear Multimode Fiber allows you to explicitly state the modal delay, whereas the two spatial components will calculate the modal dispersion from the actual modes that exist for the described index of refraction distribution. If you get confused by the difference just take a look at the associated Help for each.

Cheers!

[Josh WeberParticipant]

Excellent! Thank you, Damian.

[RavilParticipant]

I would also recommend to look at G.652-G.655 recommendations of ITU-T about SMF and DCF/NZDSF for general knowledge…

[Heitor GalvaoParticipant]

Ravil you have them in your files?

[Alessandro FestaParticipant]

Heitor please note that usually DCF has smaller area than standard G652, this has an impact if its input power is high…if ou want more information I can check if I have something in my folders.

[Heitor GalvaoParticipant]

Please check your files
my compliments

[Alessandro FestaParticipant]

If you give me your email I can send you a .txt file with Area vs wavelength

[Heitor GalvaoParticipant]

follow email: heitorbrunogalvao@gmail.com

[RavilParticipant]

Hi Heitor, sorry for late reply. The files of ITU-T recom. I mentioned before are attached. You should be able to find info about DCF in chapter 3 of G.655 file.

Attachments:

1. T-REC-G.652-200911-IPDF-E.pdf

[Heitor GalvaoParticipant]

Ravil thank you!!

[RavilParticipant]

The other attachment is here…

Attachments:

1. T-REC-G.655-200911-IPDF-E.pdf

[Heitor GalvaoParticipant]

Again Ravil thank you!!

[RavilParticipant]

Just for your information, if you go to ITU-T website you can even find this recom. even in your language if you like.

[Heitor GalvaoParticipant]

I prefer it to be in English so I can train, thanks for always be helpful and excellent tips Ravil

[Salwa MostafaParticipant]

Hi Heitor Galvao

Where is the DCF component in optiwave library ?

Thanks in advance

[Heitor GalvaoParticipant]

The optisystem offers the block “optical fiber” you will move on his properties to make it a DCF or SMF, follows where you can find him:
Default/Optical Fibers Library/Optical Fiber
my compliments

+1

[RavilParticipant]

ok, I see. You are welcome!

[RavilParticipant]

For engineering approach, I would recommend you “Optoelectronics and Photonics: Principles and Practices” S. O. Kasap. It’s easy to read and not too big in size. Unfortunately, I don’t have it in e-version.

[Heitor GalvaoParticipant]

Thanks Ravil by indication, please look at the private message that I sent
my compliments

[vignesParticipant]

dear heitor,

i just saw ur post regarding dcf, i sent one book to ur private id , refer that book and also make some clarification if need

[RavilParticipant]

Hi Vignes, what book do you recommend? (just curious…)

[Heitor GalvaoParticipant]

Tell your email that I submit the material

[vignesParticipant]

dear ravil,

dcf by siddarth ramachadran fiber based dispersion