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    #20634
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    Abdullah Baig
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    Sir RK Sethi Thankx alot for guidance. Sir you gave valuable information, which will definitely help me during writing paper.
    Sir Thankx again

    #20243
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    Abdullah Baig
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    Sir Thankyou

    #20156
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    Abdullah Baig
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    Thanx alot 🙂

    #20150
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    Abdullah Baig
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    Sir Thankyou

    Can you tell me the names of some publishers. Actually this is my 1st publication and i do not know well.
    Best Regards

    i Know 1 publisher i-e Springer

    #20148
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    Abdullah Baig
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    Agree With Ravil

    #20046
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    Abdullah Baig
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    Thanx Dear Ravil ,Abhishek Shrama, Damian Marek

    #19714
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    Abdullah Baig
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    I modified the system and simulate it without any amplifier and the results are good with low BER and Q factor=15

    I want to inquire:

    1-Can i simulate the system without Optical Amplifier or EDFA with Fiber Length =50km

    2-On which Fiber Length it becomes necessary to use amplifier?

    #19683
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    Abdullah Baig
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    As results are good at 5m EDFA Length.

    #19682
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    Abdullah Baig
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    Can we take EDFA Length 5m for 50km Optical Fiber Length.As 5m is Default value?

    #19000
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    Abdullah Baig
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    Hi Ravil
    Thanx for your reply
    You are right when i reduce system bitrate upto 8Gbit/s timing jitter removes from uplink. But it appears at 13Gbit/s.

    I am using wavelength reuse concept and down link wavelength is using in uplink part.

    1-The downlink system is good at 13Gbit/s So i can not change the system bitrate to 8Gbit/s and i have to optimize uplink on 13Gbit/s.

    2- How can i tackle with timing Jitter that is appeared on uplink???

    And Fiber length is not Paying any effect on Timing Jitter. Whether i increases or decreases the length….. Showing same results on 25km and 75km.

    #18963
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    Abdullah Baig
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    Sir Abdallah Thanx for Reply. Got your point 🙂

    #18927
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    Abdullah Baig
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    Dear Ravil
    please guide me how can i reduce the Timing Jitter. I changed the Filter From Low Pass Rectangular to Bessel and Gaussian But result remains same.
    I also used DCF but results do not varied.

    Should i use 3R regeneration???

    #18926
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    Abdullah Baig
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    Dear Ravil Thanx alot for your reply

    Actually my Project has two parts: Downlink and uplink. In downlink the fiber length is 110km but the results are good with no timing jitter.

    But the picture which is shown in attachment: is of uplink. And the fiber length in this case is 75km. But when i reduce the fiber length i-e 25km then just q Factor increases but the eye diagram remains same with same timing Jitter as shown in attachment above Pic 1.

    I am not using 3R regeneration at the end in Receiver.But using Low Pass Rectangular Filter as shown in circuit.png

    #18913
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    Abdullah Baig
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    Sir Abdallah Thanx for reply.
    1-Why there is gap between two curves as highlighted with red in pic-1? Is there any way to make the gap narrow and make eye diagram more clear?
    2-Should i finalize the above design?

    Because my target was to get the eye diagram as shown in pic-2

    #18911
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    Abdullah Baig
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    Should i change the filter so that close lines of eye diagram are obtained.