Which consequence results when a laser beam encounters thermal gradients in optical fiber?

💡 Explanation

Stimulated Brillouin scattering occurs because acoustic phonons modulate refractive index leading to backscatter; rather than homogeneity, gradients enhance scattering, because this acousto-optic interaction amplifies it, therefore creating feedback, generating coherent, backward-propagating light.

• Which outcome occurs when maximizing thermal efficiency in engines?
• Which outcome results when a solid catalyst poorly adsorbs reactants?
• Which outcome occurs when eddy currents attenuate rapidly?
• Which limitation on efficiency results from irreversibilities during a Carnot cycle?
• Which mechanism causes increased semiconductor resistance when impurities alter crystal lattice orbitals?
• Which condition occurs with increased back EMF in asynchronous motors?