| DAQ | Data Acquisition |
| DOFS | Distributed Optical Fiber Sensor |
| FRL | Fiber Ring Laser |
| HWR | Half Wave Retarder |
| LD | Laser Diode |
| OFSI | Optical Fiber Sagnac Interferometer |
| OTDR | Optical Time Domain Reflectometry |
| PC | Polarization Controller |
| PM | Polarization Maintaining |
| QWR | Quarter Wave Retarder |
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