• OFI-400C Optical Fiber Identifier


OFI-400C Optical Fibre Identifier

Rugged, hand-held and easy-to-use fibre optic test instrument designed to detect and measure the core power levels of optical signals on single-mode optical fibre without disrupting traffic on that fibre. The OFI-400C is simply clamped onto a fibre and indicates the presence and direction of traffic, CW signals and 270, 330, 1000 and 2000 Hz test tones. It allows technical personnel to unambiguously identify a specific fiber and eliminates the risk of accidental disruption of revenue service. AFL NOYES OLS7, OLS2, CSS1-SM and CSS1-MM Optical Light Sources are ideal companions for the OFI-400C.


The OFI-400C uses a unique optical head design featuring a 2-position plunger that enables it to be used with 250µm, 900µm and ribbon fibre or 2mm and 3mm jacketed fiber.  Other brands of optical fibre identifiers require users to purchase, store and swap out optical plungers each time a different type of fibre is tested. 

The OFI-400C optical head induces a safe, repeatable macro-bend to the fibre that allows a small amount of light to escape for analysis. Thanks to the design of the optical head, the insertion loss induced by the macro-bend is too small to affect the signal on the fibre and the integrity of the fiber is unaffected by the measurement process.

AFL NOYES OFI-400C instruments are designed to be simple, easy-to-use and reliable. Each features and ergonomically-designed macro-bend trigger that is comfortable to use. An integrated, backlit display allows the OFI-400C to be used in dimly lit spaces. Powered by 2 1.5V AAA batteries, theo OFI-400C can make thousands of fibre tests before needing battery replacement.


  • Insertion Loss: 1.0 dB @ 1310nm
  • Detection Sensitivity: -40 dBm @1550 nm, 3 mm fiber
  • Power Measurement: +13 to -40 dBm @1550 nm, 3 mm fiber



 OFI-400C, 2 x AAA batteries, Guick Reference Guide, Soft Case



Quick Reference Guide

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