Single Fiber 10 km SFP+ Optical Transceiver: BIDI-10G-SFP-10B
Single Mode SFP vs Multimode SFP
Amazon.com: 30M OS2 LC to LC Fiber Patch Cable with 2 Pack of 1000BASE-LX Module, Single-Mode Gigabit SFP Transceiver for Cisco, Ubiquiti, Netgear and More : Electronics
6COM Pair of single mode SFP modules, 6C-WDM-0220AID + 6C-WDM-0220BID with dual LC-type connectors and DDM :: Fiber and Ethernet :: ICD Group, Inc
Single mode SFP vs Multimode SFP Differences
Single Mode to Multimode Converter Application of SFP to SFP media converter - YouTube