EDFA

Hi Ankita,

The advantage of the Optical Amp is that you can explicitly state the gain and noise figure and the model is also much more simple.As far as the values of different paramaters used in case of EDFA such as system bit rate,Optical Fiber Length is concerned it depends on the type of application for which you are designing the system… Hope it helps

Regards
Sahil Singh

Hello Ankita Mam..
I agree with sahil Sir that as far as the values of different paramaters used in case of EDFA such as system bit rate or Optical Fiber Length is concerned it application specific..
I hope it helps you to some extent.

With Regards
Jyoti raina

Hi Ankita,

You are welcome… Hope you got the desired information…
All the Best
Regards
Sahil Singh

Hi all,

Sahil sir has rightly mentioned it that as far as the values of different paramaters used in case of EDFA such as system bit rate,Optical Fiber Length is concerned it depends on the type of application for which you are designing the system…

Thanks and regards

Hi Ankita.
As far as your query is concerned it is not all about the fiber length. To minimize the error you may have to consider other parameters as well like launching power, laser intensity and other such parameters. I think length should not be an issue as it is application specific as mentioned by others. I hope this will help.

Thanks and regards
Remo

HI ANKITA..

As mentioned by other forum members.. The length is definitely application specific..

Regards
FAYIQA

Hi Ankita,

You are welcome… and thanks everyone for the information..

Regards

Hi Ankita,

I agree with some of the opinions here. You can model your fiber length as per requirement. Hope all the information is helpful for your proceedings.

Regards

Hi Ankita,

I agree with the point put forward by Kanwarjeet that you can model your fiber length as per requirement.. Hope your query gets resolved..

Regards

Hi All,

I think Ankita must have got it now. It will be really helpful for her.

Thank you

Hello All,

I think it is a very valid good discussion here. The points put forth by various members should help Ankita for her design.
Thank you

Regards
Domail

Hi Ankita,
You can set these parameters of EDFA as:
You can also also refer to EDFA sample files of optisystem and check for various parameters in layout.
Signal emission cross section– 3.80×10-25 m2
Fiber radius– 2 μm
Length of EDF— 10,30, & 50m
Pumping power— 10,50,& 100mw
Signal input power— 10 dBm
Signal wavelength— 1552.5 nm
Pump wavelength— 980nm
Er+3 ion density— 1e+025 m-3
We assume the fundamental LP01 mode exciting at the pump wavelength (λp= 980 nm). The gain and Noise Figure can be obtained for all the three pumping configurations as a function of two fundamental fiber parameters namely: fiber length, and pump power. Thus, the required fiber parameters and pump power values can be optimized for a desired EDFA gain-NF performance at 10 and 40 Gbps.

Hope this will help you.

Hi Rajguru,

Thanks for the information… Hope it helps Ankita…

Regards

Hi nagesh, Manoj and ankita,
You are most welcome.
I will keep posting and sharing latest information on above topic.
EDFA is a very basic element in optical communication.
so, we must its operation .

Regards,
Rajguru

Hi Rajguru,

Thanks for the valuable information… Youur efforts are highly appreciated…

Regards
Rahul Tiwari

Hi Rahul,

I agree with you… The efforts of Rajguru are worth appreciating..

Regards

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Hi,
Erbium-doped fiber amplifiers are the by far most important fiber amplifiers in the context of long-range optical fiber communications; they can efficiently amplify light in the 1.5-μm wavelength region, where telecom fibers have their loss minimum.

A typical setup of a simple erbium-doped fiber amplifier (EDFA) is shown in Figure 1. Its core is the erbium-doped optical fiber, which is typically a single-mode fiber. In the shown case, the active fiber is “pumped” with light from two laser diodes (bidirectional pumping), although unidirectional pumping in the forward or backward direction (co-directional and counter-directional pumping) is also very common. The pump light, which most often has a wavelength around 980 nm and sometimes around 1450 nm, excites the erbium ions (Er3+) into the 4I13/2 state (in the case of 980-nm pumping via 4I11/2), from where they can amplify light in the 1.5-μm wavelength region via stimulated emission back to the ground-state manifold 4I15/2.