What is the ITU designation for standard single-mode fiber?

What is the ITU designation for standard single-mode fiber?

• A. G.652
• B. G.657
• C. G.653
• D. G.651

Answer: (A)

G.652 is the ITU-T designation for standard single-mode fiber. This fiber type is the baseline SMF used in most telecom networks, designed for low loss and reliable performance across the common operating windows around 1310 and 1550 nm. The other designations refer to specialized variants: G.657 covers bend-insensitive SMF for tight routing, G.653 is dispersion-shifted fiber with different dispersion characteristics, and G.651 relates to multimode fiber rather than single-mode. So for standard single-mode fiber, the designation G.652 is the match.

G.652 is the ITU-T designation for standard single-mode fiber. This fiber type is the baseline SMF used in most telecom networks, designed for low loss and reliable performance across the common operating windows around 1310 and 1550 nm. The other designations refer to specialized variants: G.657 covers bend-insensitive SMF for tight routing, G.653 is dispersion-shifted fiber with different dispersion characteristics, and G.651 relates to multimode fiber rather than single-mode. So for standard single-mode fiber, the designation G.652 is the match.