Nokia Exam 4A0-255 Topic 7 Question 60 Discussion

Actual exam question for Nokia's 4A0-255 exam

Question #: 60
Topic #: 7

[All 4A0-255 Questions]

Which of the following best describes Four Wave Mixing (FWM)?

AFWM is a linear impairment that produces crosstalk four adjacent wavelengths are used.

BFWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.

CFWM is a non-linear impairment resulting from varying velocities at different frequencies.

DFWM is a linear impairment resulting from pulses broadening over ultra-long distances

Show Suggested Answer

Suggested Answer: A

by Casie at Feb 10, 2025, 10:45 PM

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Adela

7 days ago

Haha, 'four-wave mixing' - sounds like something you'd find in a chemistry lab, not in fiber optics! But B) makes the most sense based on the description.

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Shakira

16 days ago

D) seems a bit off. Pulse broadening is more of a linear issue, not related to this four-wave mixing stuff.

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Viki

1 months ago

I don't know, these optical terms can be tricky. I'll have to remember that FWM is a non-linear thing involving wavelength interactions.

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Elbert

1 months ago

I'm not sure, but I think it's either B or C. Can someone explain the difference between the two options?

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Nu

1 months ago

I agree with Stevie, because FWM occurs due to non-linear effects in the fiber.

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Aileen

1 months ago

B) sounds right to me. Non-linear effects like FWM can create new wavelengths that interfere with the original signals.

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Tijuana

4 days ago

C) FWM is a non-linear impairment resulting from varying velocities at different frequencies.

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Ammie

8 days ago

B) FWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.

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Bobbie

25 days ago

A) FWM is a linear impairment that produces crosstalk four adjacent wavelengths are used.

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Stevie

1 months ago

I think the answer is B) FWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.

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