Which fiber type typically has the largest core?

Which fiber type typically has the largest core?

• A. Multimode step index
• B. POF
• C. Multimode graded index
• D. Singlemode

Answer: (B)

The fiber type with the largest core is Plastic Optical Fiber, which uses a core about 1 millimeter in diameter. That core size is much larger than other common fiber cores: singlemode fibers have cores around 8–10 micrometers, and glass multimode fibers have cores about 50–62.5 micrometers. The big core in POF makes it easy to couple light from inexpensive LEDs and is well-suited for short-range, high-visibility networks.

The fiber type with the largest core is Plastic Optical Fiber, which uses a core about 1 millimeter in diameter. That core size is much larger than other common fiber cores: singlemode fibers have cores around 8–10 micrometers, and glass multimode fibers have cores about 50–62.5 micrometers. The big core in POF makes it easy to couple light from inexpensive LEDs and is well-suited for short-range, high-visibility networks.