Optical phase conjugate (OPC)

[Ali Hayder]

Dears experts,

I asked a bout the principle of optical phase conjugate (OPC) and how can use to solve the problem of the nonlinear effect especially
Four Wave mixing (FWM).

[aasif bashir dar]

Sorry for late reply..
I my view opc is used for dispersion compensation… u can not solve problem of fwm using it….
With regards

[Ali Hayder]

Thank you for replying,
so,what the technique that use to solve the problem of FWM in WDM

[adnan sabbar]

Hi Ali
I explained it to you already, however, By conjugation the transmitted signal, The chromatic dispersion and Kerr effects will be cancelled through the second part of the fiber. see attached equations.
Regards

Attachments:

1. 

   OPC.jpg
   

[aasif bashir dar]

Dear hayder ali.

To understand how fwm can be mitigated, you need to under what fwm is and how this occurs.
eg. A dispersive media has low fwm effects..
Becoz two photons with differents wavelenths travel with different speeds and hence are far apart to participate in any quatum interaction.
That is also a reason we never used dispersion shifted fiber becoz zero dispersion in fiber will lead to fwm.
Besides you can cpsk modulation to suppress fwm
With ragards

[Author]

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