Which SFP+ 10GB Transceiver do I need to connect to an Aruba switch?

AXM761 should be right - LC Lucent Connector (all SFP/SFP+ have it), short range (SR), MMF multi-mode [50/125µm OM3 or OM4 so called laser optimized] fiber. What's not explicitly listed on both models is the 850 nm laser wavelength, de-facto standard on multimode fiber. 

For a direct connection, you need a dual/duplex multimode fiber with at least OM3, or OM4 (both typically aqua) quality with dual LC connectors on bot ends (typically grey). OM1/OM2 62.5/125µm [typically orange] isn't sufficient - it won't make the distance required because of the 62.5µm core does not fit the Laser sender/receiver.