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MHT CET202613 April 2026Morning ShiftChemistryd and f Block ElementsActual

Which of the following elements is doped to a fiber amplifier in an optical fiber communication system?

Options

  1. ATm
  2. BYb
  3. CEr
  4. DNd

Correct answer

C. Er

Step-by-step solution

In optical fiber communication systems, Erbium (Er) is the most commonly used element for doping fiber amplifiers. Erbium-doped fiber amplifiers (EDFAs) are widely used because they can amplify light in the 1550 nm wavelength region, which corresponds to the minimum transmission loss window of silica-based optical fibers. Answer: Er

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