In optical Communication system the Zero dispersion wave length is given by:

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UGC NET Paper 2: Electronic Science 29 Oct 2022 Shift 1
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  1. 0 nm
  2. 1310 nm
  3. 1550 nm
  4. 900 nm

Answer (Detailed Solution Below)

Option 2 : 1310 nm
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UGC NET Paper 1: Held on 21st August 2024 Shift 1
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Detailed Solution

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Concept:

Dispersion is basically said to be pulse spreading.

Two types of dispersion mainly occur:

1) Intra-modal dispersion- in all types of fiber occurs 

2) Intermodal dispersion- only in multimode fiber occurs

Intermodel dispersion is two types: it mainly depends on fiber material

a) Material dispersion

  • In this different wavelength and different speed is considered in optical fiber.
  •  when wavelength 870 nm and 1300 nm is used, dispersion is minimized which is known as zero dispersion wavelength.

b) Wavelength dispersion-

It mainly occurs in a different index of refraction.

So the correct option is2

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