Final answer:
In the context of optical fibers, it is important to always treat them as if they are coupled to a laser unless there is evidence to the contrary.
Step-by-step explanation:
In the context of optical fibers, it is important to always treat them as if they are coupled to a laser unless you can be sure that the fiber is not coupled to a laser. This is because most telephone conversations and internet communications are carried by laser signals along optical fibers.
Optical fiber communication systems have several advantages over electrical-based systems, such as low loss, high bandwidth, and reduced crosstalk. The fibers are made transparent so that light can travel long distances before requiring amplification.
Therefore, to ensure safety and proper functioning, it is best to assume that an optical fiber is coupled to a laser unless there is clear evidence to the contrary.