Extending LAN using FSO

Hello everyone,
i want to make a free space optical link connecting two LAPTOP computer via LED,IRs or Lasers. The circuit should be interfaced with ethernet i.e RJ-45.....

Can anyone please help me in this regard ? The schematics and circuitry required for this project as this is my final semester project and i have got a very less time for this..

Thanks,
Anas