What is an OTDR tool?

An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. An OTDR is the optical equivalent of an electronic time domain reflectometer.

Which is main specification of OTDR?

The fiber optic test equipment has an Ethernet interface….Help with Optical Time Domain Reflectometers (OTDR) specifications:

Wavelength Range: The wavelength range the fiber identifier is designed operate in.
Dynamic Range Resolution: The dynamic range resolution of the optical time domain reflectometer.

What are the applications of OTDR?

The Applications and Basic Settings of OTDR

  • OTDR can be used for return loss measurements, although quoted accuracy is not particularly high.
  • OTDR is useful for testing fiber optic cables.
  • OTDR is also widely used for optical cable maintenance and construction.

What is an advantage of using an OTDR?

The main advantage of using an OTDR is the single-ended test—requiring only one operator and instrument to qualify the link or find a fault in a network.

What can OTDR measure?

The OTDR measures distance and loss between the two markers. This can be used for measuring loss of a length of fiber, where the OTDR will calculate the attenuation coefficient of the fiber, or the loss of a connector or splice.

How does OTDR test work?

OTDR injects a series of optical pulses into the fiber under test. It also extracts, from the same end of the fiber,light that is scattered or reflected back from points along the fiber. The strength of the return pulses is measured and integrated as a function of time, and is plotted as a function of fiber length.

How do you analyze OTDR results?

First place one of the markers or cursors (usually called 1 or A on your OTDR) just before the reflectance peak. Next, place the second marker (referred to as 2 or B on your OTDR) just after the reflectance peak. The OTDR will calculate the loss between the two markers.

How do you test for OTDR?

Test Procedure

  1. Turn on OTDR and allow time to warm-up.
  2. Clean all connectors and mating adapters.
  3. Attach launch cable to OTDR. Attach receive cable (if used) to far end of cable.
  4. Set up test parameters on OTDR.
  5. Attach cable to test to end of launch cable. Attach receive cable (if used) to far end of cable.
  6. Acquire trace.

How do you read OTDR results?

How to Read Your Trace. OTDR displays will show a Y and X axis. The X axis measures distance, and the Y axis measures attenuation and reflection in dB. Before running your trace, select the appropriate fiber network length, pulse width and acquisition time.

What is the range of OTDR?

Dynamic Range

Wavelength 1310 nm 1550 nm
Dynamic Range 35 dB 45 dB
Typical maximum OTDR measurement range 80 km 180 km

What should you know before using an OTDR?

– Specifications for launch and receive fibers; – Correct use of launch and receive fibers; – Instructions detailing how to position the cursor for the correct reading of link, component, and segment attenuation; – List of conditions under which it is vital to measure each fiber in both directions.

What is OTDR and how does it work?

Two key thechnology for How an OTDR work? 1. OTDR Introduction. OTDR, short for Optical Time Domain Reflectometer, is a fiber optic test equipment for characterize fiber optic network. It able to detect, locate and measure events at any location on the fiber optic network. The events are displayed as graphic and displayed on the LCD screen.

How to choose and use an OTDR?

To choose a right OTDR for your test application, you should better consider the above factors. Fiberstore offers JDSU MTS-4000, YOKOGAWA AQ1200 MFT-OTDR, EXFO AXS-110-023B OTDR 1310/1550 nm (37/35 dB), etc,. with great accuracy , measurement range and instrument resolution.

What is an explanation of what an OTDR represents?

Rayleigh Scattering and Backscattering

  • Fresnel Reflection
  • Absorption. The inherent value of OTDR testing comes from diagnosing the condition of a fiber optic cable that would otherwise be impossible to see.