ITU-T G.655 Fibers Quiz

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Questions and Answers

What is a key feature of G.655 fibers?

  • Low PMD value of 0.2 ps√km
  • Suitability for CWDM applications (correct)
  • Negative dispersion value over the C-band
  • Wavelength range of 1460 to 1625 nm

Which version was introduced to extend WDM application into the S-band?

  • G.655A
  • G.655C
  • G.655D
  • G.655B (correct)

What is the chromatic dispersion value range of G.656 fiber?

  • 2 to 14 ps/(nm-km) (correct)
  • 20 to 30 ps/(nm-km)
  • 14 to 20 ps/(nm-km)
  • 0 to 2 ps/(nm-km)

What is the main characteristic of G.657 fibers?

<p>Sensitivity to bends (C)</p> Signup and view all the answers

What is a distinguishing feature of G.653 Compliant Dispersion shifted fiber?

<p>Non-zero dispersion shifted (C)</p> Signup and view all the answers

What does the G.654 Compliant Cut-off Shifted fiber enable?

<p>Use of CWDM without chromatic dispersion compensation (B)</p> Signup and view all the answers

What is the characteristic of G.652B fibers?

<p>Known as low water peak fibers (A)</p> Signup and view all the answers

Which fiber type has low attenuation at 1360nm through 1480nm?

<p>ITU-T G.653 Compliant Dispersion shifted fiber (A)</p> Signup and view all the answers

What is a characteristic feature of ITU-T G.654 Compliant Cut-off Shifted fiber?

<p>Suitable for ultra-long haul networks (C)</p> Signup and view all the answers

What problem did utilizing the low attenuation window of 1550nm cause?

<p>Generated non-linear effects in transmission (B)</p> Signup and view all the answers

Which fiber type solved the non-linear effects caused by zero dispersion at 1550nm?

<p>ITU-T G.655 Compliant Non-zero dispersion shifted fiber (B)</p> Signup and view all the answers

What is a characteristic of G.652C fibers?

<p><strong>Extremely</strong> low attenuation at 1550nm (D)</p> Signup and view all the answers

What is the main difference between G.652A and G.652B fibers?

<p>Attenuation levels at 1310nm and 1550nm (A)</p> Signup and view all the answers

Which type of fiber has a PMD (polarization mode dispersion) of 0.5 ps/sqrt.km?

<p>G.652A (A)</p> Signup and view all the answers

What is the key characteristic of G.652C fibers?

<p>High PMD (C)</p> Signup and view all the answers

How does G.652D fiber compare to G.652C fiber in terms of PMD?

<p>Lower PMD (A)</p> Signup and view all the answers

At which wavelength is G.652B fiber designed to have minimum dispersion?

<p>$1310$ nm (B)</p> Signup and view all the answers

Which ITU-T compliant fiber type is intended for non-zero dispersion shifted applications?

<p>G.655 Compliant Non-zero dispersion shifted fiber (C)</p> Signup and view all the answers

Flashcards

G.655 Fiber Key Feature

Suitable for Coarse Wavelength Division Multiplexing (CWDM) applications due to its non-zero dispersion.

G.655B Fiber

An extension of G.655 fibers designed to expand WDM (Wavelength Division Multiplexing) applications into the S-band.

Chromatic Dispersion of G.656

The chromatic dispersion value range for G.656 fiber is between 2 and 14 ps/(nm-km).

G.657 Fiber Characteristic

These fibers are characterized by their sensitivity to bends, making them suitable for installations requiring tight turns.

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G.653 Fiber Feature

It is a type of dispersion-shifted fiber, but unlike G.652, it has non-zero dispersion at 1550nm.

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G.654 Fiber Benefit

It enables the use of CWDM (Coarse Wavelength Division Multiplexing) without needing chromatic dispersion compensation.

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G.652B Fibers

These fibers are known as low water peak fibers, reducing attenuation in the 1360-1480nm range.

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G.653 Fiber Attenuation

This fiber type exhibits low attenuation throughout the 1360nm to 1480nm range, thus broadening the usable spectrum.

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G.654 Fiber Networks

Specifically designed for ultra-long haul networks, optimizing signal transmission over vast distances.

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Problem with 1550nm Window

Utilizing this window caused non-linear effects in transmission due to zero dispersion.

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G.655 Solution

This fiber has non-zero dispersion, which mitigated non-linear effects, offering a middle ground between minimizing attenuation and avoiding signal distortion

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G.652C Fiber Characteristic

They exhibit extremely low attenuation at the 1550nm wavelength, critical for long-distance signal transmission.

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G.652A vs. G.652B

The key difference lies in their attenuation levels at 1310nm and 1550nm wavelengths, affecting signal strength and transmission distance.

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G.652A PMD

This fiber type has a polarization mode dispersion (PMD) of 0.5 ps/sqrt.km.

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G.652C Key Characteristic

G.652C exibits high Polarization Mode Dispersion(PMD) which affects the quality of signal transmission

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G.652D vs G.652C

The G.652D fiber has lower Polarization Mode Dispersion, meaning it preserves signal integrity better than G.652C over long distances.

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G.652B Wavelength

Minimum dispersion is designed to occur at approximately 1310 nm to reduce signal distortion.

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G.655 Fiber Application

This fiber type is designed for non-zero dispersion shifted applications, improving performance in DWDM systems.

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