soliton & hybrid amplifier

[vikas arora]

hi all,
m new here, i hava read many qus n replies here .. u guys are very helping n i think i too will get solution to my problems .
i wanted to work on soliton but after reading some papers i came to know about its properties.. now m confused what kind of work i can do on soliton . previously dispersion compensation was in my mind.. any help plz..

[FAYIQA NAQSHBANDI]

HI VIKAS
I would like to suggest you that first of all you should chose a topic you want to work on.
As far as dispersion compensation is concerned it is a very good topic. You just have to find out or improvise existing methods to get better results than mentioned in papers you refer to. Optisystem 14 aids you very well in that regard…It has introduced DCFs , Fiber bragg gratings etc. I would suggest you to go with dispersion compensation.
thanks and regards

[FAYIQA NAQSHBANDI]

Hi Vikas

Soliton is used to refer to any optical field that does not change during propagation because of a delicate balance between nonlinear and linear effects in the medium.Right ?
Now if i correctly understand your query..Do you wish to design a system that achieves this balance between the linear and non-linear effects ?

Regards

[vikas arora]

hi fayiqa,
thnx for taking my problem into consideration.
#1 if a achieve balance between linear and non linear effects then i m able to get ideal soliton or near to ideal ? (i dn’t know how to achieve that ), i don’t know much about soliton so >>
#2 “dispersion compensation in hybrid amplifier” , in this can i use fbg , dcf n other compensation techniques for better results ??
regards

[burhan num mina llah]

Hello Vikas Arora

Hybrid optical Amplifier is also quite a good topic for your thesis i would attach few links to give u an insight of this part optical communications . Infact its been discussed in some other post also . I would attach the link below, hope u get the required help.

https://etrij.etri.re.kr/etrij/journal/getPublishedPaperFile.do?fileId=SPF-1041762620738

hybrid optical amplifier

http://www.ijsret.org/pdf/120903.pdf

Best Regards

Burhan

[Rajguru M. Mohan]

Hi Vikas,
As Soliton based optical fiber communication systems are more suitable for long haul communication because of their very high information carrying capacity and repeater less transmission.Soliton pulses does not affected(by dispersion) after long distance communication.
The fact that solitons are spatially localized and propagate with (little to) no deformation makes them the carriers of choice for modern optical communication, as they can be used to encode a bit in a small amount of space through the presence or absence of the pulse in a designated temporal window.
We have a number of challenges still need to be overcome to arrive at spatially continuous, fine resolution, sensing and actuation, the time seems ripe for the investigation of advanced control techniques for active dispersion management related to Solitons.
we could develop an L1 adaptive control scheme for the problem of active dispersion management for propagation of solitons along uncertain fibers.
I want to share some links:
Xargay, Langbort, and Hovakimyan, “L1 Adaptive Control for Optical Soliton Propagation,” in American Control Conference, San Francisco, CA, June-July 2011. [pdf]
Xargay, Langbort, and Hovakimyan, “L1 Adaptive Control for Optical Soliton Propagation,” submitted to IEEE Transactions on Control Systems Technology, 2011.

thanks,

[Rajguru M. Mohan]

Hi Vikas,
I would suggest you to go for hybrid amplifier (raman and EDFA) for long haul DWDM system.
As soliton is a new topic, as The existence of an optical soliton in
fibers is made by deriving the evolution equation for the complex
light wave envelope (or the slowly varying Fourier
amplitude) by retaining the lowest order of the group dispersion
(variation of the group velocity as a function of the light
wave frequency) and the nonlinearity, which for a glass fiber
is cubic and originates from the Kerr effect.

i also have very less interest in soliton transmission.

[Karan Ahuja]

Hi Vikas

As ranjeet has mentioned rightly that soliton based optical fiber communication systems are more suitable for long haul communication because of their very high information carrying capacity and repeater less transmission.Soliton pulses does not affected(by dispersion) after long distance communication. It is true that the fact that solitons are spatially localized and propagate with (little to) no deformation makes them the carriers of choice for modern optical communication, as they can be used to encode a bit in a small amount of space through the presence or absence of the pulse in a designated temporal window.
For dispersion compensation you can easily use fiber bragg grating. I will try to attach few links of some papers which have used fiber bragg grating for dispersion compensation.

Thanks

[Karan Ahuja]

Here is the link of the optiwave sample for dispersion compensation using FBG

Compensation of Dispersion with Fiber Bragg Grating Component

It demonstrates the possibility for dispersion compensation with the help of fiber Bragg Grating created with the Fiber Grating component. This component allows design of apodized and chirped fiber gratings that are able to provide dispersion compensation in optical system.The physical idea behind this compensation is following: creating of an apodised linear chirped grating allows us to create a time delay between different spectral components of the signal.For example, in SMF at 1.55μm, group velocity dispersion creates a negative chirp of the pulses, which means that the higher frequencies (which propagate faster) are in the leading part of the pulse and the lower (propagating slower) in the trailing one because of this different velocity of propagation of different spectral components, the pulse spreads. If we create fiber grating with period linearly reducing along the grating, because the higher frequencies will reflect after longer propagation in the grating a time delay between lower and higher frequency components will appear which is just opposite to this created in the SMF. Therefore propagating and reflecting our pulse in this device will allow to compensate the dispersion broadening of our pulse.
You may refer to this link and it will surely be of some help.
Thanks

[Karan Ahuja]

Here are links of some papers you may refer to:
http://www.photonics.com/Article.aspx?AID=19690
http://link.springer.com/article/10.1007/s10297-004-0026-9#/page-1
http://esatjournals.net/ijret/2014v03/i07/IJRET20140307086.pdf
http://www.optical-waveguides-modeling.net/Litchinitser/publ-files/JP1_JLT_1997_DC.pdf
http://www.ijarcce.com/upload/2015/october-15/IJARCCE%2047.pdf
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.512.5937&rep=rep1&type=pdf

I hope this will be helpful to you.

Thanks

[vikas arora]

i want help regarding that topic for my m.tech thesis.. (sry , i missed out this in my first post itself..)
should i go for hybrid amplifiers as i m not having much confidence if i go for soliton. ?
thanx in advance.

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