| WHO | World Health Organization |
| NI | Non-invasive |
| FOS | Fiber Optic Sensors |
| MI | Minimally Invasive |
| SPR | Surface Plasmon Resonance |
| EW | Evanescent Waves |
| SMF | Single Mode Fiber |
| WGM | Whispering Gallery Mode |
| FBG | Fiber Bragg Grating |
| UV | Ultra Violet |
| TFBG | Tilted Fiber Bragg Gratting Sensor |
| MMF | Multi-mode Fiber |
| POF | Plastic Optical Fiber |
| PCF | Photonic Crystal Fiber |
| LSPR | Localized Surface Plasmon Resonance |
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