Single Mode Mini OTDR Tester, 1550nm, 24dB

Q1: What is an OTDR used for?
A1: OTDR is a fiber optic instrument used to characterize, troubleshoot and maintain optical communication networks. OTDR testing is performed by transmitting and analyzing pulsed laser light through an optical fiber.

Q2: What is fiber loss?
A2: Optical fiber loss is the attenuation per unit length of optical fiber in dB/km, the level of fiber loss directly affects the transmission distance or the distance between relay stations, therefore, understanding and reducing the loss of optical fiber is of great practical significance for fiber optic communication.

Q3: What is an optical time domain reflectometer?
A3: The optical time domain reflectometer is a fiber optic tester used to test the characteristics of optical communication networks. OTDR is designed to detect, locate and measure events at any location on a fiber optic link. OTDR requires access to only one end of the link and works in a manner similar to a one-dimensional radar system. By providing graphical trace characteristics of the fiber under test, the user can obtain a graphical representation of the entire fiber link.

Tips: How to identify and deal with ghosting (secondary reflection peaks)?

The spikes on the OTDR curve are sometimes due to echoes caused by closer and stronger reflections from the incident end, and such spikes are called ghost images. Identifying ghosting: The ghosting on the curve does not cause significant loss. The distance between the ghost image and the beginning of the curve is a multiple of the distance between the strong reflection event and the beginning, in a symmetrical shape. Eliminate ghosting: Select a short pulse width and add attenuation in the strongly reflective front end (e.g. OTDR output). If the event causing the ghosting is located at the end of the fiber, you can "make a small bend" to attenuate the light reflected back to the beginning. 

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