Hi Faiz, Radio over Fiber (RoF) is not necessarily to have a wireless portion, In radio over fiber technology a radio signal/ is used to modulate the light from the laser source in more practical cases the input data or bit stream is multiplexed with the sine or cosine wave of frequency in the GHz range, and I would suggest you to use nearby 60 GHz as in most of the countries this frequency band is non-lincensed band (try googling for better details).
wireless portion is a specific application which is helpful in case we use a mm wave as there is no need of frequency up conversion or down conversion is required. So the transmitting and receiving station become simpler in term of complexity also.
Regards,
Dhiman