IIT-xCD: High precision chromatic dispersion analyzer

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IIT-xCD Analyzer measures chromatic dispersion in singlemode optical fibers and consists of optical transmitter with stabilized laser diodes generating measuring optical signals in the given wavelength range, and optical receiver receiving and processing optical signals transmitted through the optical fiber under test

  • Specifications

  • General Characteristics

  • Advantages & Functions

  • Number of measuring LDs

    6­ – 17

  • Wavelength range, nm

    1270­ – 1650

  • Optical fiber length, km

    1 – 160

  • Dispersion coefficient uncertainty, %

    1

  • Repeatability of dispersion coefficient, %

    0.005

  • Zero wavelength uncertainty, nm

    0.5

  • Uncertainty of chromatic dispersion slope, %

    1.0

  • Repeatability of chromatic dispersion slope, %

    0.13

  • Measurement time, s

    10

  • Based on the phase-shift method (IEC 60793-1-42, ITU-T G.650)

  • Dedicated optical fiber to transmit the reference optical signal, which increases measurement accuracy

  • Calculates chromatic dispersion by measuring the laser diode signal delays

  • Uses the approximation formulae conforming to the ITU, IEC standards for various types of optical fibers

  • Operation control, data processing, displaying and storing measurement results are done by a personal computer

  • Measures chromatic dispersion in optical lines with chromatic dispersion compensators

  • High precision

  • Can use the transmitting unit as a highly stable laser source with fixed wavelengths

  • Can measure all optical fiber parameters connected with chromatic dispersion:

    - chromatic dispersion factor at any wavelength within the measured wavelength range


    - zero dispersion wavelength


    - chromatic dispersion slope

  • IIT-nCD A - to measure installed optical cables

  • IIT-nCD B - to use in plants and laboratories where both ends of the measured optical cable are accessible


  • Analyzer Components

  • Optical transmitter IIT-nCD A(B)/I, with stabilized laser diodes generating measuring optical signals in the given wavelength range

  • Optical receiver IIT-nCD A(B)/P, receiving and processing optical signals transmitted through the optical fiber under test