Single-mode step-index fiber:

Core diameter: 7 to 11 μm

Cladding diameter: generally 125 μm

Coating diameter: 200 to 300 μm

Numerical aperture: 0.08 to 0.15

Performance: 2 to 5 dB/km with a scattering limit of around 1 dB/km at a wavelength of 0.85 μm

Bandwidth: Greater than 500 MHz km

Applications: These fibers are suited for high bandwidth and medium to long-haul applications using single-mode injection laser sources.

Multimode step-index fiber:

Core diameter: 100 to 300 μm

Cladding diameter: 140 μm to 400 μm

Buffer Jacket diameter: 400 to 1000 μm

Numerical aperture: 0.16 to 0.5

Attenuation: 2.6 to 50 dB/km at a wavelength of 0.85 μm, limited by absorption or scattering.

Bandwidth: 6 to 50 MHz Km

Applications: These fibers are best suited for short distances, limited bandwidth, and relatively low-cost applications.

Multimode graded-index fiber:

Core diameter: 50 to 100 μm

Cladding diameter: 125 μm to 150 μm

Buffer Jacket diameter: 400 to 1000 μm

Numerical aperture: 0.2 to 0.3

Attenuation: 2 to 10 dB/km at a wavelength of 0.85 μm with generally a scattering limit.

Bandwidth: 200MHz to 3 GHz Km

Applications: These fibers are best suited for short-haul and medium to high bandwidth applications (Local Area Network)