Laser Diodes in Fiber Optic Communication

Laser is an abbreviated form of ”Light Amplification by the Stimulated Emission of Radiation”. A laser is a device that produces optical radiation by the process of optical amplification based on the stimulated emission of electromagnetic readiation. Laser was developed in 1960. Invention of Laser is one of the major milestones in the history of fiber optic communication. Theodore H. Maiman at Hughes Laboratory invented the first Laser, based on teh theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A Laser emits coherent light and this is the…

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How Do You Write Material Specification for Optical Fiber Cables?

Writing specifications and stressing on the properties of the material that shall be used in the construction of fiber optic cables need a lot of technical knowledge about materials, cable and their test methods. For most of the staffs working with cable buyers, this task is troublesome and usually, they look for similar specifications. Here is a help for you. This is a standard format for the majority of the fiber optic cables used in the underground installation. You can modify as per your requirement. 1 Fiber Optic Cable: Provide all-dielectric, gel-filled, loose-tube,…

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Introduction to Plastic Optical Fiber (POF)

Optical fibers are widely used in telecommunication and are now almost replaced the legacy cables in many countries. High-bitrate high capacity transmission offered by optical fibers are irresistible to any network builder or telecom carrier. Optical fibers used in telecommunication are of silica glass based. However, there are optical fibers made of plastic, used in the digital home appliance interface, sensors, home networks and car networks. Plastic Optical Fiber, (POF), typically uses PMMA (Poly Methyl Methacrylate), a general-purpose resin as the core material, and fluorinated polymers for the cladding material….

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Two Major Prerequisites for Effective Communication

There are two major  prerequisites in order to have a successful communication, let it be between two living things or between two machines. Understandability is the first prerequisite. The transmitter and the receiver should speak the same language. If I speak in my mother tongue, which is different from the one that the receiver speaks and understands, there must be a translator. If the languages are different and if there is no translator, there is no understandability in that communication. If the transmitter and receiver speak different languages and they…

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Testing Optical Loss or Attenuation of Optical Fibers by OTDR

The fiber optic test method for measuring the attenuation or optical loss of an deployed optical fiber using an OTDR (Optical Time Domain Reflectometer) is specified in IEC 60793-1-44C or EIA/TIA-455-61. The accuracy of these test methods depends on input parameters such as source wavelength, pulse duration, Refractive index values and fiber length (Range) into the OTDR before starting measurement. Refractive index values plays a major role especially to determine the accurate length of the fiber under test. The group index (N) is provided by fiber manufacturers. Alternatively if you…

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