Totalplay / D1 / WDM Basics
Authored by Alan Turing
Physics
Professional Development
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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.
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.
3.
FILL IN THE BLANKS 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:
(a)
4.
MATCH QUESTION
1 min • 1 pt
Match the following
Polarization Mode Dispersion (PMD)
The time delay difference resulting from different propagation velocities of two optical signals with different cross polarization states
Chromatic Dispersion (CD)
The dispersion generated by the different time delays from different signals with different frequencies (or wavelengths) during their transmission over the same optical fiber
Intermodal Dispersion
The time delay difference resulting from different modes (incident angles) that have different group velocities
5.
MATCH QUESTION
1 min • 1 pt
Match the following
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.
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.
6.
REORDER QUESTION
1 min • 1 pt
Please order the following modulations from lower to higher capacity
16QAM
QPSK
8QAM
32QAM
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
Lower bandwidth
Higher noise
Higher bandwidth
Lower noise
Lower gain
Higher gain
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