Losses in photonic crystal fibers are reduced to a level of . . . . . . . .

The correct answer is: A. 0.1dB/km

Photonic crystal fibers (PCFs) are a type of optical fiber that has a regular structure of air holes in a silica glass matrix. This structure allows PCFs to have very low losses, typically around 0.1dB/km. This is much lower than the losses of conventional optical fibers, which are typically around 1dB/km.

The low losses of PCFs make them ideal for use in

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