Two mode Multiplexer

[Abdallah Ismail]

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).

Attachments:

1. Optical-Differential-8-Level-Phase-Shift-Keying-OD8PSK-MDM-EDFA.osd

[Abdallah Ismail]

In the last row,i mean “………..or it works only for LP01?”

[Damian Marek]

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.

[Damian Marek]

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”

[Author]

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