PDM-QPSK - Optiwave

This topic has 16 replies, 7 voices, and was last updated 8 years, 4 months ago by Sanjeev kumar.

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- November 15, 2014 at 2:09 pm #15615
  
  Monika
  Participant
  
  I am trying to design PDM-QPSK in optisystem v11.
  Can any one help me to design that system?
  Please show me the circuit for that..
- November 15, 2014 at 2:59 pm #15623
  siva rama krishna
  Participant
  you can refer this paper
  “Influence of Pulse Shape in 112-Gb/s WDM PDM-QPSK Transmission”
  Attachments:
  
  05593198.pdf
- November 15, 2014 at 5:57 pm #15626
  
  Ravil
  Participant
  
  Here you can find its features and comparison with other modulation formats:
- November 15, 2014 at 5:58 pm #15627
  Ravil
  Participant
  attached file here…
  Attachments:
  
  Lach_OFT_2011a.pdf
- November 16, 2014 at 12:13 am #15653
  
  Monika
  Participant
  
  I am working in optisystem v11. And pulse carver, DFB and EC-LT are not given in that version. In this case what I should do?
- November 16, 2014 at 2:53 am #15656
  Abdallah Ismail
  Participant
  I downloaded the design from Optiwave site.
  Please check osd and m files.
  also i have many designs in optiwave examples but i don’t now it’ll be opened by 11 version because it made for version 13.
  You can check optisystem>files>Examples>Advanced Modulation systems>psk Systems>QPSK
  Attachments:
  
  100-Gbps-DP-QPSK-System-with-DSP.zip
- November 16, 2014 at 4:00 am #15662
  
  siva rama krishna
  Participant
  
  Details of pulse carving can found on this link
  <a href=”https://optiwave.com/forums/topic/generation-of-rz-dqpsk-modulation-for-different-duty-cycles/” target=”_blank”></a>
- November 16, 2014 at 9:27 am #15669
  
  Monika
  Participant
  
  @Abdallah- can u please send me the image or screenshot of this osd or m file?
- November 16, 2014 at 1:00 pm #15670
  
  Monika
  Participant
  
  Plz give me an idea to design 90° optical hybrid.
- November 16, 2014 at 3:22 pm #15678
  
  Ravil
  Participant
  
  Are you able to use MLL with short pulses or your bit rate is too high for that?
- November 16, 2014 at 3:27 pm #15679
  Ravil
  Participant
  Here is the scheme I used for DQPSK. You can see 90 deg. phase produced by local generator (at the transmitter) and couplers are used at the receiver. I don’t have scheme in v11, sorry.
  Attachments:
  scheme.jpg
- November 17, 2014 at 7:26 am #15691
  
  Monika
  Participant
  
  @ Ravil- thanks alot..but i want to use 90° optical hybrid at the rx. Or u have made pdm-qpsk system then plz upload pic for that.
  - December 3, 2014 at 1:40 pm #16368
    Damian Marek
    Participant
    Here is a brief explanation of the component in detail attached.
    
    Attachments:
    90Degree.png
- November 23, 2014 at 9:48 pm #15923
  
  Heitor Galvao
  Participant
  
  See this tutorial: https://optiwave.com/applications/100-gbps-dp-qpsk-system-with-digital-signal-processing/
  my compliments
- February 10, 2015 at 12:51 am #17543
  
  Monika
  Participant
  
  @Heitor- Thanks alot!!
- February 10, 2015 at 12:53 am #17544
  Monika
  Participant
  for M.Tech Thesis what work can be done based on this paper..please suggest me.
  i have attached my paper here.
  Attachments:
  
  PMD-IN-PDM-QPSK.pdf
- December 27, 2015 at 10:36 am #28930
  
  Sanjeev kumar
  Participant
  
  Ravil sir what bit rate, sequence length u have adjusted for dqpsk system to work satisfactorily to give result in terms of ber and q factor.
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