Optical fiber light paths
OPTICAL FIBER / SINGLE-MODE

Single-mode optical fiber.

Single mode optical fiber on reels: compare G.652.D and G.657 attenuation, geometry, coating diameter and published bend-loss tests.

4 fiber models

G.652.D optical fiber reel with model label, illustrative image
Single-mode

G.652.D

Fiber on reels

Single mode optical fiber for backbone cable designs

Attenuation · 1550 nm
≤ 0.185 dB/km (standard)
Cladding diameter
125 ± 0.7 μm
Coating diameter
242 ± 7 μm
Backbone & metro
G.657.A1 optical fiber reel with model label, illustrative image
Single-mode

G.657.A1

Fiber on reels

Bend-insensitive access fiber

Attenuation · 1550 nm
≤ 0.210 dB/km
Cladding diameter
125 ± 0.7 μm
Coating diameter
245 ± 10 μm / 200 ± 10 μm
FTTx & access networks
G.657.A2 optical fiber reel with model label, illustrative image
Single-mode

G.657.A2

Fiber on reels

Bend insensitive fiber for FTTH

Attenuation · 1550 nm
≤ 0.210 dB/km
Cladding diameter
125 ± 0.7 μm
Coating diameter
242 ± 7 μm / 200 ± 10 μm
High-density FTTx
G.657.B3 optical fiber reel with model label, illustrative image
Single-mode

G.657.B3

Fiber on reels

Built for tighter fiber routing

Attenuation · 1550 nm
≤ 0.210 dB/km
Cladding diameter
125 ± 0.7 μm
Coating diameter
242 ± 7 μm
Indoor FTTH

Supplier reference values. Images are illustrative. Confirm the offered grade, coating and batch documentation with your quotation.