OM4 Multimode optical fiber

OM4 multimode fiber for data center links

OM4 multimode fiber on reels for compatible data center and storage network cable designs. For AI data center fiber selection, compare the listed 850 nm effective modal bandwidth, attenuation and geometry; qualify the transceiver, connectors and complete channel separately.

Core diameter: 50.0 ± 2.5 μm
Attenuation · 850 nm: ≤ 2.4 dB/km
Effective bandwidth · 850 nm: ≥ 4700 MHz·km

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PRODUCT DATA

Technical specifications

Values below are supplier reference limits. Test conditions and units are shown for engineering review.

OM4 optical fiber reference specifications
Parameter / test condition	Reference specification
Core diameter	50.0 ± 2.5 μm
Cladding diameter	125 ± 1.0 μm
Attenuation at 850 nm	≤ 2.4 dB/km
Attenuation at 1300 nm	≤ 0.6 dB/km
Effective modal bandwidth at 850 nm	≥ 4700 MHz·km
Coating diameter	245 ± 7 μm

Reference source: Jiangsu Nanfang Optical Fiber Product Manual, pages 15–16. Translated from the Chinese manufacturer document. Values describe the source grade; confirm the offered supplier, coating and batch conformity with your quote. Manufacturer series names identify source products, not an authorized distributorship.

SPECIFICATION & PROCUREMENT

Before you request a OM4 quote.

Clear answers from the reference specifications, with the supply scope kept explicit.

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What 850 nm effective modal bandwidth is listed for OM4?

The OM4 reference lists effective modal bandwidth of ≥ 4700 MHz·km and attenuation of ≤ 2.4 dB/km at 850 nm. Use these fiber parameters with the transceiver, connector and complete-channel requirements; they do not independently establish a data rate or reach.

Is this optical fiber on reels or a finished fiber optic cable?

This page describes coated optical fiber on reels for use before cabling, not a finished cable, connector assembly or installed channel. The published table is supplier reference data, not a test report for your order. Ask the quotation to identify the offered manufacturer, exact grade and coating, and the documents that will accompany the allocated reels.

What should I include in a OM4 optical fiber RFQ?

For OM4, specify the coating option, total fiber-km, preferred continuous length per reel, and delivery country and ZIP or postal code. Request the offered datasheet, traceable reel list and applicable batch test report; state required fields and approval timing. Identify acceptable alternatives separately. Pricing, minimum order quantity and lead time are confirmed with the actual supplier quotation. RFQ checklist → · Reel documentation →

OM4 Multimode optical fiber

OM4 multimode fiber for data center links

Technical specifications

AI data center fiber: review the OM4 reference.

Before you request a OM4 quote.

Make a more informed decision.

OM3 vs OM4: Start with the Complete Data Center Link

Effective Modal Bandwidth: What MHz·km Means for OM3 and OM4

Optical Fiber RFQ Checklist: Prepare a Complete Inquiry

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