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RCDD · Question #1

All of the following are nominal wavelengths for laser light sources EXCEPT:

The correct answer is A. 700 nm. Standard fiber optic laser sources operate at specific nominal wavelengths defined by industry standards; 700 nm is not among them.

Wireless Technology Fundamentals

Question

All of the following are nominal wavelengths for laser light sources EXCEPT:

Options

  • A700 nm
  • B850 nm
  • C1300 nm
  • D1310 nm
  • E1550 nm

How the community answered

(26 responses)
  • A
    77% (20)
  • C
    8% (2)
  • D
    12% (3)
  • E
    4% (1)

Why each option

Standard fiber optic laser sources operate at specific nominal wavelengths defined by industry standards; 700 nm is not among them.

A700 nmCorrect

The nominal wavelengths recognized for fiber optic laser sources are 850 nm, 1300/1310 nm, and 1550 nm, as defined by TIA/EIA and IEEE standards. The 850 nm window is used for short-range multimode fiber, 1300/1310 nm for multimode and single-mode fiber, and 1550 nm for long-haul single-mode fiber. 700 nm falls outside all standardized fiber optic transmission windows and is not a nominal laser wavelength in any common fiber optic specification.

B850 nm

850 nm is a standard nominal wavelength used for short-range multimode fiber optic links.

C1300 nm

1300 nm is a recognized nominal wavelength window used in multimode and early single-mode fiber systems.

D1310 nm

1310 nm is a standard single-mode and multimode fiber optic wavelength defined in ITU-T and TIA specifications.

E1550 nm

1550 nm is a standard nominal wavelength used for long-haul single-mode fiber and DWDM systems.

Concept tested: Nominal fiber optic laser wavelength standards

Source: https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/white_paper_c11_734498.html

Topics

#fiber optics#laser wavelength#optical networking#nominal wavelength

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