GAOTek Compact Fiber Optic Identifier

This compact fiber optic identifier is an easy to use test device used to detect signals on optical fibers for a wavelength ranging from 800 nm~1700 nm using the safe and reliable macro-bending technology.



GAOTek Compact Fiber Optic Identifier detects the optical signals being transmitted through the optical fiber at the splice point without causing any interruption to the service. It is suitable to operate on 0.03 in, 0.009 in, 0.07 in, 0.1 in (0.9 mm, 0.25 mm, 2 mm, 3 mm) fiber type. The fiber optic identifier provides transmission direction, multiple signal frequencies identification and detachable InGaAs detector. It employs safe and reliable macro bending technology to avoid the disruption of network communications that would normally be caused due to the need to disconnect or cut the fiber optic cable for identification and testing. With a very small signal loss, normal communications can be maintained while identifying the transmission direction, speed and relative signal strength on its 5-level display. It can be used for Live fiber detection, multiple signal frequency identification and tracing with CW or tones and make core power measurements. It is intended for engineers and technicians to identify dark or live fiber and excessive losses due to misalignment of mechanical splices or poor connections.


  • Easy-to-use with “ONE KEY” operation
  • Indicates the signal direction in fiber
  • Detect multiple signal frequencies at 270 Hz, 1 kHz and 2 kHz with tones
  • Adapter for 0.03 in, 0.009 in, 0.07 in, 0.1 in (0.25 mm, 0.9 mm, 2.0 mm, 3.0 mm) fiber
  • Low battery indication
  • Durable metal housing and quality construction
  • Powered by 1 units of 9 V battery

Technical Specifications

Wavelength range 800 nm-1700 nm (SM)
Recognizable signal type CW, 270 Hz ± 5 %,1 kHz  ±5 %,2 kHz ±5 %
Detector type  InGaAs 2pcs
Fiber type 0.03 in, 0.009 in, 0.07 in, 0.1 in (0.25 mm, 0.9 mm, 2.0 mm, 3.0 mm)
Sensitivity +10 dBm ~ -50 dBm
Accuracy * +10 dB to -30 dBm (Continuous Wave)
+10 dB to -25 dBm (Modulated Signal)
Signal display Signal direction; signal frequency (2 kHz/1 kHz/270 Hz); low battery
Battery 9 V
Operating temperature 14 ° F to 122 ° F (-10 °C to + 50 °C)
 Storage temperature -4 ° F to 140° F (-20 °C to  + 60 °C)
Humidity <90 % RH
Dimension 7.8 in × 1.1 in × 1.0 in (200 mm × 30 mm × 27 mm)
Weight 0.4 lbs (0.2 Kg)

Additional Information

Function Description

  1. Clamp: Holds the fiber in a suitable location.
  2. Clamp Pushing Button: Push the button up and press downward to fix the adapter head.

Press the button again to loosen the adapter head.

  1. LED indicator: To show the signal direction, modulation and battery

 Instructions “How to Use”

  1. Selecting the Adapter – Select the appropriate adapter head according to the type of fiber
  2. Clamp and Loosen
    1. Please insert the fiber into the adapter head and then push the “Clamp Pushing Button” up to clamp the fiber and test it
    2. Please push forward slightly to loosen the adapter head
  3. On/Off
    1. Push up the “Clamp Pushing Button” to turn on the unit
    2. Loosen the “Clamp Pushing Button” to turn off the unit
  4. Optical Fiber Identification
    1. Insert the fiber to the adapter head, push the button up to lock the clamp and cover sunshade
    2. When optical signal passes the fiber, the LED illuminator will indicate the traffic’s direction with intermittently audible tone and the relative core power will be also displayed in digital format
    3. If no optical signal passes the fiber, the LED illuminator is dead and the “LO” will be displayed in the relative core power position.
    4. Fiber identifier can also detect the presence of 2 KHz, 1 KHz and 270 Hz modulated tone with the continuously audible tone
  5. Battery Power Indication
    1. When the LED indicator is green, the battery power is full
    2. When the LED indicator is yellow green, then the power is low but the instrument can still work and test result is still reliable
    3. When the LED indicator is red, the power is too low and the instrument cannot work properly and the battery needs to be replaced
  6. Maintenance
    1. The fiber should be put in the groove according to the specific type
    2. Please use the cotton swabs to clean the detector surface regularly to keep it clean
    3. Please take out the battery when it is not in use for a long period of time