You're looking for a "media converter", often sold in pairs for ~$50. Match it to the fiber connectors you buy.
Media converters are effectively a switch, but less flexible. I would buy a switch with an sfp+ port instead and use it with an appropriate sfp module.
alt Hacker News
Media converters are effectively a switch, but less flexible. I would buy a switch with an sfp+ port instead and use it with an appropriate sfp module.