Singlemode Fibre optic cables is typically used between switching offices

Singlemode fiber has a small core and just one path for light to travel down. Since there is only one wavelength of light moving through the core, single mode light aligns at the center of the optic core rather than bouncing about the interior of the core, which is the technology that enables multimode cable to carry multiple light signals. With only a single wavelength of light passing through its core, singlemode fiber optic cable realigns the light toward the center of the core instead of simply bouncing it off the edge of the core as with multimode. Singlemode Fibre optic cables Mini SAS  is typically used in long-haul network connections spread out over extended areas (longer than a few miles). For example, telcos use it for connections between switching offices. Singlemode fiber optic cable features a 9-micron glass core.

Multimode fiber has a large diameter fiber core. Due to its relatively large size, multiple channels of light can be transmitted, allowing multiple bandwidths and signals to be transmitted simultaneously. Multimode works great for most fiber applications. It works especially well in alarm systems, audio/video systems and production, desktops and laptops, and display systems. Multimode Fibre optic cables has a large-diameter core that is much larger LC Connector than the wavelength of light transmitted, and therefore has multiple pathways of light-several wavelengths of light are used in the fiber core. Multimode fiber optic cable can be used for most general fiber applications. Multimode fiber optic cable is used for bringing fiber to the desktop, for adding segments to your existing network, or in smaller applications such as alarm systems. It comes with two different core sizes which are 50 micron or 62.5 micron.