100 gb/s using PM-QPSK modulation design optical fiber transmission network

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    • May 8, 2015 at 3:44 pm #20629
      wenhui feng
      Participant

      Hi, I’m Feng Wenhui college students from China.I’m learning to use optisystem this software.I have been a regular WDM optical fiber transmission system, also studied the coherent reception.I want to learn the 100 gb/s PM-QPSK modulation of optical fiber transmission system.At the same time I also doing research in this field.Because not familiar with using this software, so I want to ask you about 100 gb/s optical fiber transmission system.Have the following requirements:
      1.Based on the designed optisystem13.0 version.
      2.The receiving system using the DSP technology.
      3.Speed up to 100 gb/s, and need is PM-QPSK modulation and demodulation.
      It is best to have the process and parameters, thank you so much.

    • May 8, 2015 at 11:25 pm #20641
      Ravil
      Participant

      Hi wenhui feng,

      I am answering your questions in the order you asked them. Since you are learning how to use OptiSystem, I would recommend you the following link first “100 Gbps DP-QPSK System with Digital Signal Processing” (https://optiwave.com/applications/100-gbps-dp-qpsk-system-with-digital-signal-processing/). It runs in 12 and 13 versions of the software. The DSP techniques is described briefly there. PM-QPSK modulation and demodulation are the essential components of the scheme.

    • May 8, 2015 at 11:36 pm #20642
      Ravil
      Participant

      For further reading (if you would like to get a better understanding), I can recommend you the paper of X. Liu, S. Chandrasekhar and J. Winzer “DSP Techniques Enabling Multi-Tb/s Superchannel Transmission”. It has a good general overview of DSP architecture as well as all building blocks of it. At the same time, it has many useful references for details (depens on what you are more interested in). Unfortunately, I can’t upload it due to copyright rules and regulations…

    • May 9, 2015 at 1:21 am #20645
      wenhui feng
      Participant

      Dear Ravil

      Thank you for your help
      Can you tell me where I can find to the “DSP Techniques Enabling Multi-Tb/s Superchannel Transmission”?
      In addition,I mainly want to study PM-QPSK modulation transmitter, can you help me?

    • May 9, 2015 at 4:09 am #20647
      wenhui feng
      Participant

      Dear Ravil

      Can you send the paper for email to me?
      My email:595858648@qq.com
      Thank you very much!

    • May 9, 2015 at 3:39 pm #20650
      Ravil
      Participant

      Hi wenhui feng,

      This paper is from IEEE Signal Processing Magazine. You can get it throw IEEE Library. I referred it to you as a good source of general knowledge. There are many papers you can find about PM-QPSK in that library as well. In general, it comes from well-known from electrical communications QPSK technique (you should be able to find the description of it in any telecom textbook if you need), which is being applied for 2 polarizations of optical signal. Please, check your email.

    • May 9, 2015 at 3:55 pm #20651
      Ravil
      Participant

      It was one of the first papers that considered Optical QPSK in details. In my opinion, it is good for main understanding. As I mentioned before, there are many papers, which are related to different aspect of Optical QPSK technique application, were published after that (mostly in IEEE and Lightwave journals).

    • May 11, 2015 at 1:47 am #20677
      wenhui feng
      Participant

      Hi Ravil

      I have a simulation file, but let me not satisfied, the results of simulation out mostly poor eye diagram and bit error rate is too high, the transmission effect is bad, can you help me to look at my argument? Or you can help me to modify it?
      Really thank you very much!

    • May 11, 2015 at 1:49 am #20678
      wenhui feng
      Participant

      Hi Ravil

      This is the simulation file.
      Once again, thank you.

    • May 11, 2015 at 2:06 am #20680
      wenhui feng
      Participant

      Hi Ravil

      You send me email I ordered doesn’t open link, I want to upload a file, but don’t know why I can’t upload, I met some simulation problem, I would like to ask you, can we use email?

      • May 12, 2015 at 2:52 pm #20748
        Damian Marek
        Participant

        Wenhui,

        What type of file are you trying to attach? Can you email it to me at:

        damian.marek@optiwave.com

        so that I can try uploading it, in case it is a bug.

        Regards

        • May 13, 2015 at 12:13 am #20756
          wenhui feng
          Participant

          Hi Marek

          I send you eamil is always be returned, what reason is this?

        • May 13, 2015 at 3:50 pm #20787
          Damian Marek
          Participant

          I don’t know, what about attaching the file via dropbox or google drive?

    • May 11, 2015 at 7:03 am #20683
      wenhui feng
      Participant

      Hi Ravil

      Do you know where digital to analog converter(ADC) in Optisystem? I can’t find.

      • May 11, 2015 at 7:40 am #20686
        Alessandro Festa
        Participant

        Signal Processing/Tools/Electrical

        +2
    • May 11, 2015 at 8:52 am #20687
      wenhui feng
      Participant

      Hi Alessandro

      Do you know where the polarization beam splitter can find?
      Thank you very much!

      • May 11, 2015 at 9:32 am #20689
        Alessandro Festa
        Participant

        Passives Library/Optical/Polarization

        +1
    • May 13, 2015 at 9:36 am #20776
      Ashu verma
      Participant

      Hi you can access the documents ,provided by optiwave.You will find every component you want or your system.Also you will get some extra content to read about components also.

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