What is the definition of 'splice loss' in fiber optics?

'Splice loss' in fiber optics specifically refers to the reduction in signal strength that occurs at the point where two optical fibers are joined together. This joint can be made through various methods such as fusion splicing or mechanical splicing, and during this process, there can be imperfections such as misalignment of the fibers or variations in the refractive index at the joint. These factors contribute to the loss of light signal as it travels through the splice, leading to a measurable decrease in signal quality.

In contrast, the other choices describe different concepts. The total loss of signal through a single fiber segment encompasses all forms of attenuation, not just the splice, and covers issues like absorption and scattering. The failure of an optical connector pertains specifically to the malfunctioning or faulty components connecting fibers, which may also lead to signal loss but is not the same as splice loss. Lastly, degradation of signal over long distances often relates to cumulative losses throughout the fiber due to factors like distance, bends, and environmental conditions, rather than just the intersection of two fibers. Thus, 'splice loss' is accurately defined as the loss occurring specifically at the junction of two joined optical fibers.