Question

which cable is preferred for undersea communication a) step index multimode b) multimode c) single mode d) graded index multimode​

Answer 1

Answer:

The correct in the option is ("c" single mode")

Explanation:

• Single-mode fiber is a form of optical fiber that is commonly utilized for long-distance transmission. It is one of two optical fiber kinds, with multi-mode fiber being the other. A single-mode fiber is a strand of glass that transmits only one mode or beam of light.
• There is only one transmission mode in single-mode fiber. It can transmit larger bandwidths than multi-mode fiber, although it does require a light source with a narrow spectral width.
• A single-mode optical fiber is also known as a un-mode fiber, mono-mode optical fiber, or single-mode optical waveguide.
• In comparison to multi-mode fibre, single-mode fibre offers a higher transmission rate and a nearly 50-fold longer distance. Single-mode fibre, on the other hand, is more expensive than multi-mode fibre.
• The size difference in the fibres' core, as well as the corresponding loss or attenuation and fibre bandwidth, is the most fundamental distinction between single-mode and multi-mode fibres. The core, cladding, and coating or buffer are the three basic components of an optical fibre. The core is the most important element of the optical fibre. This is where the light passes through on its way to the other side. Single-mode fibres have a considerably smaller core than multi-mode fibres.

Answer 2

Answer:

OPTION (C) Single Mode

Explanation:

We have to determine which cable can we prefer for undersea communication.

• There are two types of optical fibers: SIngle-mode and Multi-mode.
• We know that the single-mode cable is, more often than not, used for transmissions that go over a long distance. It is simply a strand of glass capable of transmitting one mode, as it says in its name, or a beam of light.
• In single-mode fiber, there is only one transmission mode. A few of its requirements include a source of light along with a narrow spectral width.
• If we were to juxtapose single-mode and multi-mode in order to compare the two fibers, we will find out that the single-mode is capable of transmitting larger bandwidth than the multi-mode ones and they bear a smaller core than the latter.

Hence, a single-mode cable is preferred for undersea communication.

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