Table 1.
A summary of MFBG sensors reported in the literature.
| Measurand, Fabrication method |
Sensitivity (nm/RIU or pm/°C or pm/με) |
Measured range (RIU or °C) |
Length of grating (μm) |
Radius of MFs (μm) |
Ref. |
|---|---|---|---|---|---|
| RI, Etch-eroded MF and UV irradiated FBG |
16 nm/RIU @ a RI around 1.35 | 1–1.378 | 2,500 | 3.0 | [22] |
| RI, Etch-eroded MF and commercial FBG |
-- | 1.35–1.42 | 700 | 5.3 | [23] |
| RI, MF by flame brushing method and FIB-milled FBG |
660 nm/RIU @ a RI of 1.39 | 1.33–1.39 | 518 | 0.9 | [36] |
| RI, Suspended core fiber drawn from preform and UV irradiated FBG |
∼167 nm/RIU @ a RI of 1.40 | ∼1.40–1.41 | -- | 1.7 | [43] |
| RI, MF wrapped on a microstructured rod |
1,200 nm/RIU @ a RI of 1.33 | -- | -- | 0.3 | [41] |
| RI, Etch-eroded MF and commercial FBG |
1st mode: 19.4 2nd mode: 52.1 3rd mode: 92.0 nm/RIU @ a RI around 1.38 |
∼1.32–1.41 | 50 | 3.5 | [24] |
| RI, MF by commercial puller and FIB-milled FBG |
125 nm/RIU @ a RI around 1.36 | 1.358–1.374 | 10 | 3 | [32] |
| RI, FBG by metal lift-off technology |
511 nm/RIU @ a RI around 1.41 | 1.00–1.42 | 5,000 | 5 | [42] |
| RI, MF by flame brushing method and FBG by femtosecond laser pulse irradiation |
231.4 nm/RIU @ a RI of 1.44 | 1.32–1.46 | 4,000 | 1 | [40] |
| Temperature, MF by commercial puller and FIB-milled FBG |
20 | 21–440 | 36.6 | 3.3 | [31] |
| Temperature, MF by commercial puller and FIB-milled FBG |
22 | 23–228 | 12 | ∼2.5 | [35] |
| Temperature, Etch-eroded MF and commercial FBG |
1st mode: 13.0 2nd mode: 15.9 3rd mode: 32.0 |
30–60 | 50 | 3.5 | [24] |
| Strain/Force, MF by CO2 laser heating technique and UV irradiated FBG |
∼1.2 | 0–0.15N | 5,000 | 1.75 | [26] |
| Strain, Etch-eroded MF and commercial FBG |
0.9 | -- | 50 | 3.5 | [24] |