- This topic has 10 replies, 6 voices, and was last updated 10 years, 6 months ago by  Heitor Galvao. Heitor Galvao.
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April 20, 2015 at 3:22 pm #19966 gherbi mohamedParticipant gherbi mohamedParticipanthi, 
 i find many examples of RoF system and i dont’n understand why we use the loop control and what’s mean the number of loop and if i dont’t use this component my simulation is true or false?.
 please help me.
 best regards
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April 20, 2015 at 10:00 pm #19974Ravil ParticipantHi gherbi mohamed, Can you, please, upload the examples you are mentioning? Or, in case if you can’t (due to copyrights regulations) just give a references to the sources? It will help other with visualizing your question and better help you with it. 
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April 21, 2015 at 6:52 am #19984Anamika Basnotra Participantthe loop is used in the system if u are using the components like amplifiers in ur setup 
 eg. if u r using an amplifier and u are using a loop control with it, and keep the no. of loops as 3. that means u r amplifing ur signal 3 times
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April 21, 2015 at 9:49 am #19992 Ashu vermaParticipant Ashu vermaParticipantYes I am agree with Anamika.You can take small distance of fiber and put amplifier to mitigate the effect of attenuation .And run no of loops,every time loop run it amplifies signal again n again, 
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April 21, 2015 at 9:59 am #19993 Ashu vermaParticipant Ashu vermaParticipantSry i wanted to put this answer to another post 
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April 21, 2015 at 2:17 pm #20013 gherbi mohamedParticipant gherbi mohamedParticipanthi, 
 thanks for you.
 this a link which use a loop control but if i need to design an optical system with dispersion conpensation ( with loop control) without use an amplifier, its true or false?
 best regards
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April 21, 2015 at 4:32 pm #20023Anamika Basnotra Participanthi, Gherbi Mohamed 
 you can try removing amplifier from the loop
 and check the result, bt may be results wont be displayed or the o/p may be worse.
 its always preferable to use amplifier with DCF.
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April 22, 2015 at 3:37 am #20032 gherbi mohamedParticipant gherbi mohamedParticipantthank’s anamika 
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May 2, 2015 at 2:53 am #20274Ajay Vyas ParticipantHi Gherbi 
 You are working on RoF. Have you idea about the feedback concept of RoF link. How we can develop the predistorter for it
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May 2, 2015 at 9:59 am #20284 Ashu vermaParticipant Ashu vermaParticipantHi Ajay vyas, why you want to use feedback?Can you please attach on which you are working??? 
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May 2, 2015 at 1:42 pm #20292 Heitor GalvaoParticipant Heitor GalvaoParticipantThe use of the loop control is to control the amount of laps on a circuit involving a fiber and a aplificador for example, it is easier to control the dispersion and prevents unnecessary usage of many amplifiers for many large distances. 
 
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