SFP Switch

I'm in the process of upgrading our backbone. I've been looking around but can't find exactly what I'm looking for. To share our upgraded fiber out from our MDF to all of the IDF's I was told there is such a thing as a SFP switch. I'm looking for just SFP ports. We use HP switches. Any ideas or specific terminology I should use in a search?

I should probs be looking at a modular switch?