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Which of the following best describes Four Wave Mixing (FWM)?
Suggested Answer: A
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33 comments · newest first
LI
Ligia
11 months ago
Sounds like a complex topic, but I think B is the right answer!
KR
Kristofer
11 months ago
I thought it was more about the interaction of multiple wavelengths.
AD
Adelle
11 months ago
Wait, is it really just about two wavelengths?
WY
Wynell
11 months ago
I agree, it's all about crosstalk at different wavelengths!
FR
Francesco
12 months ago
FWM is definitely a non-linear effect.
XE
Xenia
12 months ago
I vaguely recall that FWM can cause issues in optical fibers, but I can't remember if it's about the sum and difference of wavelengths or something else entirely.
CA
Carry
1 year ago
I feel like I might be mixing up FWM with other linear impairments. I need to double-check if it's really non-linear like I think.
OM
Omega
1 year ago
I think I practiced a question similar to this, and it mentioned that FWM involves the interaction of multiple wavelengths, which makes me lean towards option B.
GE
Georgene
1 year ago
I remember FWM being related to non-linear effects, but I'm not sure if it's specifically about crosstalk or something else.
VA
Vanna
1 year ago
I'm not entirely confident, but I'm leaning towards B since it mentions the sum and difference of wavelengths, which sounds like the definition of four-wave mixing.
JU
Justine
1 year ago
This seems straightforward. Four-wave mixing is a non-linear effect that creates new wavelengths, so I'll go with B.
RO
Rosina
1 year ago
Okay, I remember learning about four-wave mixing in class. I think option B is the best description of what it is.
MA
Marleen
1 year ago
Hmm, I'm a bit confused about the difference between linear and non-linear impairments. I'll need to think this through carefully.
AR
Arthur
1 year ago
I'm pretty sure this is asking about a non-linear effect in optical fibers, so I'll focus on options B and C.
AD
Adela
1 year 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.
IL
Ilene
1 year ago
User 3: B) makes sense, it's all about crosstalk at different wavelengths.
CA
Catrice
1 year ago
User 2: Yeah, it does sound more like a chemistry experiment than a fiber optics issue.
CA
Catherin
1 year ago
User 1: I agree, B) is the best description of Four Wave Mixing.
SH
Shakira
1 year ago
D) seems a bit off. Pulse broadening is more of a linear issue, not related to this four-wave mixing stuff.
JU
Justine
1 year ago
C) FWM is a non-linear impairment resulting from varying velocities at different frequencies.
SO
Solange
1 year ago
B) FWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.
BE
Benedict
1 year ago
A) FWM is a linear impairment that produces crosstalk four adjacent wavelengths are used.
VI
Viki
2 years 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.
YO
Yolando
1 year ago
User 2: Yeah, that sounds right. FWM does involve interactions between wavelengths.
ER
Ernie
1 year ago
User 1: I think the answer is B) FWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.
EL
Elbert
2 years ago
I'm not sure, but I think it's either B or C. Can someone explain the difference between the two options?
NU
Nu
2 years ago
I agree with Stevie, because FWM occurs due to non-linear effects in the fiber.
AI
Aileen
2 years ago
B) sounds right to me. Non-linear effects like FWM can create new wavelengths that interfere with the original signals.
TH
Thaddeus
1 year ago
D) FWM is a linear impairment resulting from pulses broadening over ultra-long distances
TI
Tijuana
1 year ago
C) FWM is a non-linear impairment resulting from varying velocities at different frequencies.
AM
Ammie
1 year ago
B) FWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.
BO
Bobbie
2 years ago
A) FWM is a linear impairment that produces crosstalk four adjacent wavelengths are used.
ST
Stevie
2 years ago
I think the answer is B) FWM is a non-linear impairment that produces crosstalk at the sum and difference of two wavelengths.