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by Fiber-MART.COM OTDR  (Optical Time Domain Reflectometer), as one of the important fiber optic testers, is most commonly used by technicians or installers to certify the performance of new fiber optic links and detect the issues of existing fiber links. There are some specifications of an OTDR which may affect its performance. To understand these specifications can help users get maximum performance from their OTDRs. Today, one of the key specifications—Dead Zone will be introduced here.   Definition of Dead Zones The OTDR dead zone refers to the distance (or time) where the OTDR cannot detect or precisely localize any event or artifact on the fiber link. It is always prominent at the very beginning of a trace or at any other high reflectance event.   Why Is There a Dead Zone? In simple terms, OTDR dead zone is caused by a Fresnel reflection (mainly caused by air gap at OTDR connection) and the subsequent recovery time of the OTDR detector. When a strong ...

Technology has massively gotten better over the years and now the standard is to have LAN on commercial facilities. LAN stands for local area network. It is ideal for places where there are many different computers or devices that will be using the same network and link to the server. Many LAN traditionally use Ethernet copper cable but this starts to become a problem when more and more devices or cables are added. These problems include bandwidth, limited cable infrastructure, and even connectivity issues.   The better option for LAN would be fiber optics, also known as POL. This is because they provide a higher bandwidth, better security, and take up less space. They even lower the power usage by up to 40%. These cables also tend to be more flexible for the network design and are easier to install because they do not require as much equipment.   The Four Main Things You Need To Install Passive Optical LAN: Optical Line Terminal (OLT) – This is needed because it is...

Introduction of LSZH Fiber Optic Cable by Fiber-MART.COM What is LSZH Fiber Optic Cable? LSZH fiber optic cable  has no difference from other fiber optic cables, but it has a special cable jacket which is made of LSZH materials. LSZH stands for Low Smoke, Zero Halogen. This type of cable jacket has excellent fiber safety characteristics of low smoke, low toxicity and low corrosion. This is because LSZH materials are free of halogenated materials like Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I) and Astatine (At), which are reported to be capable of being transformed into toxic and corrosive matter during combustion and decomposition. LSZH fiber optic cable is now being widely used in many places.   Characteristics of LSZH Fiber Optic Cable The main characteristics of  LSZH fiber optic cables  are as following:   Release no dangerous smoke and gas during confusion Low emission of toxic gases and halogens during decomposition Low ...