| OTDR | Optical Time-Domain Reflectometry |
| OFDR | Optical Frequency-Domain Reflectometry |
| CP-OTDR | Chirped Pulse Time-Domain Reflectometry |
| EDFA | Erbium-Doped Fiber Amplifier |
| SOA | Semiconductor Optical Amplifier |
| RMSD | Root-Mean-Squared Deviation |
| CC | Cross-Correlation |
| NN | Neural Network |
| NN1 | Neural Network of 7 × 7 Input Matrix |
| NN2 | Neural Network of 3 × 7 × 7 Input Matrix |
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