It all depends on the connectors of the fibre cables you are using.
see this link
http://www.thefoa.org/tech/connID.htmFor instance, for my company. The fibre comes into the building and a cable with two FC connectors attach to it, then on the other end of that cable there is two LC connectors that plug straight into the GBIC module that is inserted into the switch.
The GBIC module we use is the
ProCurve Gigabit-SX-LC Mini-GBIC (J4858B) this module accepts LC connectors.