Following are the major parameters associated with fibers:

• • Forward attenuation/km
  • Backward attenuation/km (if asymmetric) 
  • Polarization mode dispersion
  • Polarization-dependent loss (PDL)
  • Dispersion (chromatic and material)
  • Zero-dispersion wavelength
  • Dispersion flatness over spectrum range
  • Birefringence
  • Cutoff wavelength. 

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