You may check optisystem for implementation oofdm or you may make your own codes or optical components blocks in MATLAB 

VPI is also a good software to simulate the OOFDM system. Maybe you can find the OOFDM sample in that software. 

Both optisystem and VPI are good softwares to set up an optical OFDM system. There are some existing modules about OFDM transmitter and receiver in both softwares. You can also add your own MATLAB codes into the simulation platform using the cosimulation module with MATLAB. Good luck!

Thanks a lot Chandra, Feng and Chen. Do you by chance have any material that can help in the general knowledge of VPI? Thanks again.

HI,

Many demo examples related to optical OFDM are available in VPI. You can post  questions and get hints on the VPI users Forum:

http://forums.vpiphotonics.com/

good luck

M.B. Balogun: VPI software have many interesting demos about optical OFDM; you need check the manuals that include that software.