What is the only thing a continuity tester tests for in optical fibers?

What is the only thing a continuity tester tests for in optical fibers?

• A. Break
• B. Attenuation
• C. Reflectance
• D. Bend Radius

Answer: (A)

The key idea is whether the fiber provides a continuous optical path. A continuity tester checks if light can travel from one end to the other. If there’s a break in the fiber, the path is interrupted and no light reaches the far end, signaling a loss of continuity. That’s exactly what the tester is designed to detect—a break (an open circuit) in the fiber. Attenuation looks at how much signal is lost along a length of fiber, which requires comparing input and output power—not just a binary pass/fail of continuity. Reflectance deals with back-reflected light at joints or defects, requiring a reflectometer or OTDR-based approach. Bend radius concerns how sharply the fiber can be bent before losses occur, which involves bending tests and loss measurements under those conditions. So a continuity tester’s purpose is to confirm a continuous path, i.e., detect a break.

The key idea is whether the fiber provides a continuous optical path. A continuity tester checks if light can travel from one end to the other. If there’s a break in the fiber, the path is interrupted and no light reaches the far end, signaling a loss of continuity. That’s exactly what the tester is designed to detect—a break (an open circuit) in the fiber.

Attenuation looks at how much signal is lost along a length of fiber, which requires comparing input and output power—not just a binary pass/fail of continuity. Reflectance deals with back-reflected light at joints or defects, requiring a reflectometer or OTDR-based approach. Bend radius concerns how sharply the fiber can be bent before losses occur, which involves bending tests and loss measurements under those conditions. So a continuity tester’s purpose is to confirm a continuous path, i.e., detect a break.