Planning Fiber Optics Networks   by Bob Chomycz

By Bob Chomycz

Plan and enforce fiber optic networks

Effectively layout and installation bandwidth-rich networks for significant kinds of info site visitors. overlaying either short-reach and long-haul networks, Planning Fiber Optic Networks offers complete information on all significant fiber optic parameters and comprises applicable historical past concept and layout calculations. you'll find instructions for optimizing SONET/SDH and Ethernet networks, establishing community topologies, minimizing sign loss and impairments, and utilizing darkish fiber. Real-world examples are incorporated all through this useful guide.

  • Understand sign propagation in a single-mode fiber
  • Plan an optical loss budget
  • Maintain an appropriate optical signal-to-noise ratio (OSNR)
  • Learn concerning the results of chromatic dispersion (CD) and polarization mode dispersion (PMD)
  • Expand fiber skill utilizing wavelength department multiplexing (WDM)
  • Reduce fiber nonlinear impairments
  • Perform fiber characterization to make sure optimum caliber and performance
  • Test Ethernet and SONET/SDH networks
  • Plan point-to-point and ring fiber topologies
  • Lease or buy darkish fiber

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Sample text

If passive WDMs are in the link, then their insertion loss at both cable ends is entered here. The WDM insertion loss is available from the manufacturer. 7. If DCMs are included in the link, their insertion loss is entered here. This information is available from the manufacturer. 8. If optical amplifiers are used in the link, enter their total gain of all amplifiers in the link as a negative dB value here. 9. Any other components in the link that contribute to the link loss are entered on this line.

This results in some of the light to be reflected back to the source. Rayleigh scattering is intrinsic to the fiber and therefore cannot be eliminated. Fresnel reflections occur in the light path where there is an abrupt change in the refractive index such as at connections and splices. The further away a reflective event is from the fiber launch point the less it contributes to the total reflected power. Therefore, fiber connections and splices closest to the laser contribute the most to the ORL.

10. The link loss line is the summation of lines L5 to L9 and represents all losses and gains in the fiber link. This is the value that is measured with an optical power meter during testing and turn-up. A positive value represents an overall link loss and negative is a gain. 11. The chromatic dispersion (CD) penalty is entered in this line. Typically, 1 or 2 dB is specified for a transceiver舗s CD penalty by the manufacturer. 12. The polarization mode dispersion (PMD) penalty is entered in this line for only 10 Gbps and higher transmission rates.

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