Fiber Channel to SATA or SAS conversion?

I'm upgrading a system that currently runs from 4GFC RAID rack mount unit via fiber several meters away to external packs of spinning disks. Im Looking to replace with the spinners with solid state drives. Appear the vast majority of dense SSDs are in the 2.5" format are only SATA/SAS interface. How can one convert an existing FC interface to SATA?Any thoughts or hints would be appreciated.

thanks!