how can i transmit the signals thru Plastic optical fibre

i want to know the power electronics use in this.
i want to try out transmitting sensors and limit switches signals thru Plastic optical fibre,cable is rather cheap than copper as the no. of devices are large ,but the electronics behind it is a liitle confusing with new technologies emerging.
i want to know the electronic circuitry needed to do this,
i am attaching a word file with image drawn by me on CAD please check if i will require more than this.
is it complete ? please help .!