Search Results for 'loop control'

[SAHIL SINGHParticipant]

Hi all,

We shoould make it sure that we do not get offensive here on any issue… Such things create a bad impression of the forum and divulge from its primary purpose… Anyways let us forget it once and for all.. Further i agree with asif that in the TOOL library in optisytem there is acomponent named LOOP CONTROL which allows you to build systems using loop structures… Hope the query is resolved..

Regards
Sahil Singh

[aasif bashir darParticipant]

no issues from here,,
hope the jyoti had got the solution to her problem..

i want to mention that the in the TOOL library in optisytem… there is component named LOOP CONTROL>>>Allows you to build systems using loop structures

The loop topology starts at the Loop output port and terminates at the Loop input port. The signal enters the Input port and circulates in the loop N times, where N is defined by the parameter Number of Loops

hope now you have no problem in looping the signal

with regards

[jyoti rainaSpectator]

hi burhan…i had gone through the link and it has amplifiers also…i am using only loop control for fiber distance only not amplifiers and moreover it is not simulation file..anyways i am thankful to u for sharing such info..
thanx

[burhan num mina llahParticipant]

Hi Jyoti raina

As far as loops are concerned there are few links i am posting that might help u and regarding variation i would suggest u to disable random seed as suggested by all by double clicking on every possible components and you might find a random seed option that u need to uncheck that to disable random seed.

Lesson 3: Optical Systems — WDM Design

why use loop control in circuit

Regards

Burhan

[jyoti rainaSpectator]

hi aabid baba..thanks for ur kind reply..
i have checked all the parameters and every parameter in the system i am making is same….what i am doing is i am using a loop control component to replace 150 km fiber in terms of loops…
please cn u tel me what is this generate seed option and where i hv to enable it…does it increase or decrease bit error rate..
thanks in advnce

[Aabid BabaParticipant]

Hello jyoti,
All have rightly mentioned that what prime purposed of loop control are and what for you should use it. As far as your query is concerned , there could be various reasons why your two results are varying. I suggest you to first set alike parameters for every component you are using in your system design. Also try to disable the ‘generate seed’ option. logically , the results should not vary much. I hope you implement all these things and check for the results.
Regards

[jyoti rainaSpectator]

hi MHD…thanks for ur reply…
it is helpful the way u explained..but i am not able to find the link…can u please upload any simulation file which has used loop control component for fiber only..i am designing a very basic system with loop control so it u can upload nay simulation file it will be very helpful…thanks in advance

[jyoti rainaSpectator]

hi ranjeet…thanks fr ur reply.
i have learned that we can use loops for multiplying the fiber distance using a single fiber but using a loop control..but i did not undersatnd what you meant when u said that when we multiply size of SMF and DCF we have to change its parameters… does using SMF and DCF have to do anything with loop control..please can u explain it.. thanks in advnce

[jyoti rainaSpectator]

hello naazira badar… thanks fr ur reply..
I understand that dispersion compensation fibers compensate dispersion losses bt i ll use it in future times.. currently my problem in with loop control..my BER results vary for two cases..i have started it in new topic..please check that..i hope u will answer there..
thanking u in advance

[MHD NAParticipant]

it is easier to control the dispersion and prevents unnecessary usage of many amplifiers for many large distances…I would suggest you to go through the design which shown in the link i am posting…it makes use of loop control..

[jyoti rainaSpectator]

hi fayiqa naqshbandi… thanks for the reply
the link u had posted has designed a system where it has used loop control fr both fiber link as vl as opt. amplifier….i am using it only fr optical fiber bt here it is bit complicated and it has used 2 fibers in between…i am using a single fiber and my distance is 150 km and i hv kept loops = 3..can u tel me why BER shows variation….thanking u in advnce

[FAYIQA NAQSHBANDISpectator]

HELLO JYOTI
The use of the loop control is to control the amount of laps on a circuit involving a fiber and a amplifier for example, it is easier to control the dispersion and prevents unnecessary usage of many amplifiers for many large distances…I would suggest you to go through the design which shown in the link i am posting…it makes use of loop control..

Dispersion Compensation Schemes – A System Perspective

Can u upload ur osd file
Thanks and regards

[alistuParticipant]

You’re welcome. You do not need to use the amplifiers both before and after the fiber in case you are using loop control. Either you put it before or after the fiber, you can make the comparison. However, you should see why you are using the amplifiers in the system (as power booster, pre-amplifier, or in-line amplifier).

[alistuParticipant]

Allow me to exemplify this: If you are using a 500 km fiber which needs optical amplifier every 100km, you can easily use a 100km fiber followed by an amplifier and put it in a loop using loop control, setting number of loops to 5. Otherwise, you would have to connect 5 pieces of fiber and 5 amplifiers. However, you can certainly simulate the system without using it.

[Swapandeep KaurParticipant]

What is the use of loop control that has been used in wdm examples of optisystem?? can we design the system without it?