Two mode Multiplexer - Optiwave

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This topic has 3 replies, 2 voices, and was last updated 10 years, 4 months ago by Damian Marek.

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- June 23, 2014 at 7:00 am #12091
  
  Abdallah Ismail
  Participant
  
  Dear All,
  Actually I built a mode multiplexing system with two mode each one with 8-DPSK.
  But the system is working well for the fundamental mode but it provide closed eye diagram for the LP02 carrying mode.
  I don’t know the source of the problem but i think that the power of LP02 mode is small.
  The main 8-DPSK is downloaded from Optiwave download area.
  
  Can anyone help me to improve LP02 BER?
  Can i use EDFA black box for the LP02 amplification before transmission or it works only for LP02? (i tested it,it is not working with me).
- June 23, 2014 at 7:14 am #12093
  
  Abdallah Ismail
  Participant
  
  In the last row,i mean “………..or it works only for LP01?”
  - June 23, 2014 at 1:28 pm #12117
    
    Damian Marek
    Participant
    
    You should be able to use the EDFA to amplify the modes. I just tried it out and it is working for me. LP 01 and LP 02.
- June 23, 2014 at 1:07 pm #12116
  
  Damian Marek
  Participant
  
  The power does seem a lot lower for the LP02 mode. Have you tried using the built-in PSK coders and modulators? The simulation will probably run much faster and be more readable. Look at the example files in “OptiSystem 12 Samples/Advanced modulation systems/PSK systems”
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