Optimized for outstanding bend performance in demanding data center and enterprise network applications.


LaserWave® FLEX 300/550 (OM3/OM4) Fibers are 50 micron (μm) laser-optimized multimode fibers designed to support 10 Mb/s through 400 Gb/s applications in data centers, high performance computing centers and enterprise LANs with superior bending performance, enhancing fiber management and low-cost connectivity.

LaserWave FLEX Fiber extends the application of multimode fiber to support transmission speeds up to 400 Gb/s. Using low-cost 850 nm Vertical Cavity Surface Emitting Laser (VCSEL) transceivers, the fiber supports a wide variety of applications including Ethernet, Fiber Channel, InfiniBand and the Optical Internetworking Forum (OIF)Interface Agreements.

The fiber offers extremely low bending loss at both the 850 and 1300 nm operating windows, while maintaining excellent long-term fiber strength and reliability. LaserWave FLEX Fiber can be installed in loops as small as 7.5 mm radius with less than 0.2 dB bending loss at 850 nm and 0.5 dB at 1300 nm. This improved performance can guard against instances of higher loss caused by tight bends, thereby increasing system reliability and maximizing network uptime.


  • Designed for high speed, next generation enterprise and data center networks
  • Bend-optimized, and fully backward compatible with legacy, non bendinsensitive OM3 and OM4 networks
  • Industry-leading clad diameter, clad non-circularity and numerical aperture tolerances
  • Flex-10® Coating for outstanding fiber protection along with easy strippability
  • Supports network speeds up to 400 Gb/s
  • Better macrobend performance enables better space utilization and more compact designs, while facilitating jumper MACs
  • Enables minimal connection loss and low cabled attenuation


LaserWave® FLEX Multimode Fiber is designed to enable low cost connectivity for 10 Mb/s through 100 Gb/s applications that include:
  • Data Centers
  • High Performance Computing Centers
  • Local Area Networks
  • Storage Area Networks
  • Central Offices
Unit of Measure


Single-Mode or Multimode

N/A Multimode

Performance Characteristic



N/A Central offices Data Centers High Performance Computing Centers Local Area Networks Storage Area Networks

Bend Performance

N/A Bend-Optimized

Physical Characteristics

Core Diameter

N/A 50 ± 2.5 µm

Core Non-Circularity

N/A ≤ 5 %

Clad Diameter

N/A 125 ± 0.8 µm

Clad Non-Circularity

N/A ≤ 0.7 %

Core/Clad Concentricity Error (Offset)

N/A ≤ 1.0 µm

Coating Diameter

N/A 242 ± 5 µm

Coating Non-Circularity

N/A ≤ 5 %

Coating-Clad Concentricity Error (Offset)

N/A ≤ 12 µm

Tensile Proof Test

N/A 100 kpsi0.69 GPa

Coating Strip Force Range

N/A 0.22 - 2.0 lbf 1.0 - 8.9 N

Typical Coating Strip Force

N/A 0.6 lbf2.7 N

Standard Reel Lengths

N/A 2.2 to 8.8 km

Optical Characteristics

Attenuation at 850 nm

N/A ≤ 2.2 dB/km

Attenuation at 1300 nm

N/A ≤ 0.6 dB/km

Minimum Bandwidth Specification

 FLEX 550 (OM4)FLEX 300 (OM3)
Laser EMB @ 850 nm47002000
Laser EMB @ 1310 nm500500
Overfilled @ 850 nm35001500
Overfilled @ 1300 nm 500 500

Attenuation at 1380 nm minus attenuation at 1300 nm

N/A ≤ 1.0 dB/km

Attenuation Uniformity/Point Discontinuities at 850 and 1300 nm

N/A ≤ 0.08 dB

Numerical Aperture

N/A 0.200 ± 0.010

Zero Chromatic Dispersion Wavelength (λ0)

N/A 1297 ≤ λ0 ≤ 1328 nm

Zero Chromatic Dispersion Slope (S0)

N/A S0 ≤ 4(-103) /(840(1-( λ0 /840)4)) ps/(nm²·km)

Group Refractive Index at 850 nm

N/A 1.483

Group Refractive Index at 1300 nm

N/A 1.479

Backscatter Coefficient at 850 nm

N/A -68.4 dB

Backscatter Coefficient at 1300 nm

N/A -75.8 dB

Environmental Characteristics

Operating Temperature Range

N/A -60 to +85 ºC

Temperature Induced Attenuation at 850 and 1300 nm from -60 to +85 ºC (5 24-Hour Cycles)

N/A ≤ 0.1 dB/km

Temperature and Humidity Induced Attenuation at 850 and 1300 nm from -10 to +85 ºC, 94% RH (30 24-Hour Cycles)

N/A ≤ 0.1 dB/km

Accelerated Aging (Temperature) Induced Attenuation at 85 ºC for 30 days

N/A ≤ 0.1 dB/km

Water Immersion Induced Attenuation, 23 ºC for 30 Days

N/A ≤ 0.1 dB/km

Dynamic Fatigue Stress Corrosion Parameter (nd)

N/A ≥ 18

How To Order:

Order From Location

N/A 1 Brightwave Blvd.Carrollton, GA 30117, USA 1-770-798-5555 from outside the USA 1-888-fiberhelp (1-888-342-3743) from inside the USA CARROLLTON LOCATION