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. 2015 Jun 30;15(7):15494–15519. doi: 10.3390/s150715494

Table 1.

Characteristics of the different configurations of the TC sensor.

Config. 1st Sensor Configuration 2nd Sensor Configuration 3rd Sensor Configuration 4th Sensor Configuration
Light source (Laser) 7 mW
650 nm
30 mW
650 nm
30 mW
650 nm
20 mW
650 nm
Optical fibers bundle Multimode
Øcore = 100 µm
NA = 0.22
Scrambler + Multimode
Øcore = 100 µm
NA = 0.22
POF
Øcore = 240 µm
NA = 0.5
Single-mode illuminating fiber
Øcore = 4.3 µm
NA = 0.12
Multimode receiving fibers
Øcore = 100 µm
NA = 0.22
Photodetectors gain Symmetric gain
G1 = G2 = 0.75 × 104 V/A
Asymmetric gain
G1 = 0.75 × 105 V/A
G2 = 2.38 × 105 V/A
Asymmetric gain
G1 = 0.75 × 105 V/A
G2 = 2.38 × 105 V/A
Asymmetric gain
G1 = 0.75 × 105 V/A
G2 = 2.38 × 105 V/A
Calibration curve Inline graphic
V2/V1 = −0.089d + 1.8783
Inline graphic
V2/V1 = −0.2002d + 2.4578
Inline graphic
V2/V1 = −0.213d + 5.0064
Inline graphic
V2/V1 = −0.2167d + 3.8448
Cross section of the common leg graphic file with name sensors-15-15494-i005.jpg graphic file with name sensors-15-15494-i006.jpg graphic file with name sensors-15-15494-i007.jpg graphic file with name sensors-15-15494-i008.jpg
Laboratory precision 141 µm 51 µm 33 µm 24 µm
Wind tunnel precision 24 µm - 25 µm 28 µm