Features

• Ø50 µm Core / Ø125 µm Cladding and Ø62.5 µm Core / Ø125 µm Cladding Fibers Available
• Three Bandwidth Options (OM2, OM3, or OM4) for Ø50 µm Core Fiber (See Specs Tab for More Information)
• Ø62.5 µm Core Fiber Available Pre-Spooled in 100 m and 1000 m Lengths

Thorlabs' graded-index (GRIN) multimode fiber provides lower modal dispersion and less bend loss than traditional multimode step-index fiber, with a broad operating wavelength range from 800 - 1600 nm (see the Graphs tab for attenuation plots over this range). Because of the larger core size compared to single mode fiber, these fibers provide a higher transmission capacity and are used for short-range communication networks and high-speed transmission applications. The gradient of the refractive index between the core and cladding determines the available bandwidth at a given wavelength.

Our Ø50 μm core / Ø125 µm cladding graded-index fibers provide improved transmission rates and are available with three different bandwidths (OM2, OM3, or OM4). The fiber coating is a Ø242 μm mechanically strippable acrylate coating. These fibers are particularly well suited for use in telecom applications; the bandwidth is optimized for high-performance 850 nm laser systems, but can also be used with LEDs at 850 nm or 1300 nm at a reduced bandwidth (see the Specs tab for more information). 

Low-loss, high-bandwidth Ø62.5 μm core / Ø125 μm cladding graded-index fiber (OM1) uses a dual-layer acrylate coating that protects against water, temperature, and humidity extremes. GIF625 fiber is offered per meter or pre-spooled in lengths of 100 m or 1 km.