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Totalplay / D1 / WDM Basics

Authored by Alan Turing

Physics

Professional Development

Used 4+ times

Totalplay / D1 / WDM Basics
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8 questions

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1.

DRAG AND DROP QUESTION

1 min • 1 pt

The chromatic​​ (a)   is the phenomenon by which a ​ (b)   separates white light into various beams of monochromatic light.

dispersion
prism
attenuation
splitter

2.

DROPDOWN QUESTION

1 min • 1 pt

The electromagnetic ​ (a)   is the arrangement of electromagnetic ​ (b)   according with their ​ (c)   or​ wavelength; where we can find invisible signals like x-rays, ​ (d)   or even visible light where we can find the​ (e)   such as red, orange, yellow, green, cyan, blue and purple.

spectrum
colors
waves
frequency
infrared light

3.

FILL IN THE BLANK QUESTION

1 min • 1 pt

This acronym refers to the technology that is able to transmit multiple service signals with multiple wavelengths over one single optical fiber:

4.

MATCH QUESTION

1 min • 1 pt

Match the following

Chromatic Dispersion (CD)

The time delay difference resulting from different modes (incident angles) that have different group velocities

Intermodal Dispersion

The dispersion generated by the different time delays from different signals with different frequencies (or wavelengths) during their transmission over the same optical fiber

Polarization Mode Dispersion (PMD)

The time delay difference resulting from different propagation velocities of two optical signals with different cross polarization states

5.

MATCH QUESTION

1 min • 1 pt

Match the following

G.652

This fiber is also know as non-zero dispersion shift (NZDSF). Therefore, there is certain dispersion of around 4 ps/nmkm at 1550nm that is close to the one of G.653 but without the problem of strong non-linear effects.

G.653

This fiber is the widely used single-mode fiber (SMF). It has around of 17 ps/nmkm at 1550nm. It is also called dispersion-unshifted fiber.

G.655

This fiber is called dispersion shifted fiber (DSF). It has zero-dispersion at 1550nm to match the minimum attenuation window of the fiber. But it has strong non-linear effects.

6.

REORDER QUESTION

1 min • 1 pt

Please order the following modulations from lower to higher capacity

8QAM

32QAM

16QAM

QPSK

7.

CATEGORIZE QUESTION

3 mins • 1 pt

By comparing the EDFA vs Raman amplifiers, please match the following features with the correct type of amplifier

Groups:

(a) EDFA

,

(b) Raman

Higher noise

Lower gain

Higher bandwidth

Lower noise

Higher gain

Lower bandwidth

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