1. Optical Fiber Identifier

The OFI-3 Optical Fiber Identifier is a low cost, portable instrument designed to detect optical signals without disrupting traffic. During maintenance, installations, rerouting or restorations, it's often necessary to isolate a specific fiber. By simply clamping the OFI-3 onto a fiber, the OFI will indicate if there is a signal, a 2kHz tone, or traffic and show signal direction.

The OFI-3 is recommended for both 0.25/0.9 mm bare fiber and 3mm jacketed fiber. When testing coated fibers, the slim design of the OFI-3 allows easier access to a splice tray where the amount of work space is limited. The clamping trigger is designed to fit the natural motion of the operator's hand. A highly impact molded plastic case makes the OFI-3 suitable for use outside plant or in the central office.


  • Easy and convenient operation with a single keystroke
  • Detecting three signal frequencies 2kHz,1kHz,270Hz
  • Displaying signal intensity
  • Low battery reminder
  • Two 1.5 V dry batteries (Mignon AA size)
  • Concise LED light
  • Interchangeable adapter heads(clamps) for jacketed and coated fiber.

back to top


Sensitivity(Minimum recognizable optical power intensityin the fiber)
Continuous Wave
2KHz Modulated Wave Detection
1KHz Modulated Wave Detection
270Hz Modulated Wave Detection

back to top

Technological Parameter

Recognizable wavelength range
900 to 1650nm
Recognizable signal type
Detector type
InGaAa 2pcs
Clamp type
H0.9/0.25 for bare fibers
H2.5 for jacketed fiber
Detecting sensitivity
a)signal on line
b)signal traffic
Left or right LED
c)signal frequency
2kHz LED
d)signal intensity
5 grades LED
e)low battery

back to top

General Specification

Operating temperature
-10 to +50
Storage temperature
-20 to+70
1.5V AA batteries*2pcs

back to top

Ordering Information (Standard Items)

  • Main unit
  • Carrying case
  • Operating Manual
  • Warranty Registration Card
  • Batteries
  • Two interchangeable adapter heads(clamps) for jacketed and coated fiber

  back to top


Back to Top | Optical Talk Set | Visual Light Source | Optical Laser Source | FiberPal™ OTDR |