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    May 29, 2018 at 12:31 pm #48915
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    NEETHU N
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    Sir, as I confronted another problem that there didn’t find any variation in the output spectrum due to low frequency signals(vibration), I was unable to proceed with Optisystem. Can’t detect any changes that sine wave signals in the kHz range make to the light wave.(I have asked about this problem in another question in the forum;couldn’t get a reply) . Sir, isn’t low frequency detection possible in Optisystem?

    May 23, 2018 at 11:22 pm #48877
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    NEETHU N
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    Can anyone please rply?

    May 18, 2018 at 6:06 am #48821
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    NEETHU N
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    Sir, can’t we detect a low frequency signal using Optisystem software? No variation observed in the spectrum analyzer for frequencies less than about 50 MHz

    May 3, 2018 at 12:29 pm #48741
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    NEETHU N
    Participant

    ok sir

    May 2, 2018 at 11:08 pm #48726
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    NEETHU N
    Participant

    Thanks sir. Can I get the web-sight link for that webinar?

    May 2, 2018 at 11:01 pm #48725
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    NEETHU N
    Participant

    OK sir, thanks.

    April 22, 2018 at 2:39 am #48611
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    NEETHU N
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    So, what can I do now.? ,to detect the backscattered light and to check the phase variation of the modulated light by the vbration?

    April 19, 2018 at 2:50 am #48590
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    NEETHU N
    Participant

    Yes sir, its working eventhough the the graph(or optisystem visualizer) is not like what is expecting. And it is about the next step I don’t know what to do. ie, get a vibration signal and interact this modulated light with that.

    April 19, 2018 at 2:22 am #48588
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    NEETHU N
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    Sir, chirp function was found from the ‘mathworks’ web sight. I used it to create linear frequency modulated pulses. Is chirp function is different?
    https://in.mathworks.com/help/signal/ref/chirp.html.

    But there is problems in the plots of signals. It is not like what we are expecting from the command. That is why I interchanged the two frequency values

    April 18, 2018 at 2:58 am #48570
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    NEETHU N
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    SIR ,PLEASE FIND THE ATTACHED

    Attachments:
    1. Project1.zip
    2. Untitled.zip
    April 13, 2018 at 2:27 am #48517
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    NEETHU N
    Participant

    Sir, I attach here the osd file. It has a MATLAB component. So attaching its code also.

    An LFM signal is created and mixed with laser light- thats what I did upto now. Actually the project is to send this light through fiber and analyse the
    backscattered light after interaction with the vibration signal.

    April 12, 2018 at 1:27 am #48493
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    NEETHU N
    Participant

    Ok sir.
    So in which software I can do that? And also, can I make a relation between that variable and the vibration frequency I was intended to use??