MCQOPTIONS
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| 1. |
For used in single-mode fiber, ___________ are used preferably |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | Brillouin fiber amplifier |
| Answer» B. Erbium-doped fiber amplifier | |