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Optical fibers (with special chemicals added)

By Steve Rogers,

Optical fibers (with special chemicals added) can be used as optical amplifiers. This allows an optical signal to travel further between endpoints, and without converting the optical signal to electrical and back, reducing the overall cost of the components. These optical amplifiers can also be used to create Lasers. These are called fiber lasers. They can be very powerful, because the long thin fiber is easy to keep cool, and makes a good quality light beam.

The technicians who will actually perform the installation must be trained and certified by an organization such as the Fiber Optic Association (FOA, www.thefoa.org ) and/or by the manufacturers of those materials to be installed. The certification gives us a level of confidence that the installation technicians are experts and that they have the necessary preparation for the work in question.

The last four requirements of the contractor (verification, troubleshooting, documentation, and restoration) should be discussed even before starting the project. Each fiber optic project requires insertion loss tests of each connection with a light source and a power meter or an optical loss test equipment in accordance with industry standards. Some projects, such as long connections with splices in the external plant, may also need tests with OTDR (optical reflectometers in the time domain). The contractor and the client must agree that the tests include troubleshooting and repair, as well as documentation of the test results of each connection.

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