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by www.fiber-mart.com OTDR that is short for optical time domain reflectometry, is a fiber optic tester for the characterization of optical networks that support telecommunications. It can be used to measure loss, optical return loss (ORL) and optical distance on a fiber optic link. Besides, by providing pictorial trace signatures of the fibers under test, an OTDR can offer a graphical representation of the entire fiber optic link. However, there are so many OTDR brands in the market. Choosing the right OTDR for your application can be challenging. So this post is intended for giving some reminders when choosing an OTDR. Hope it may help you.   Why You Need an OTDR? As we all know, fiber testing is an essential procedure to make sure that the network is optimized to deliver reliable and robust services without fault. So here are two reasons for why an OTDR is needed.   First, service providers and network operators want to insure that their investments into fiber n...

by Fiber-MART.COM OTDR, full name of which is optical time-domain reflectometer is one of the most popular method of testing the light loss in the cable plant. In most circumstance, it also indicate an fiber optic testing instrument to characterized the optical fibers. OTDRs are always used on OSP cables to verify splicing loss or locating damages to the fiber optic cables. Due to the decline in the OTDR price over recent years, it is more and more applied by technicians for the system installation process.   OTDR testing   OTDR uses backscattered light of the fiber to imply loss, which is an indirect measurement of the fiber. OTDR works by sending a high power laser light source pulse down the fiber and looking for return signals from backscattered light in the fiber itself or reflected light from connectors or splice interface. OTDR testing requires a launch cable for the instrument to settle down after reflections from the high powered test pulse overloads the in...