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Figure from:A study on tapered optical fiber sensor for relative humidity measurements / Huda Adnan Abdullah Zain

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Figure 3.1: Flame brushing machine (S. W. Harun et al., 2013).

Figure 3 1: Flame brushing machine (S. W. Harun et al., 2013).

Related Figures (31)

Figure 2.1: Basic structure of an optical fiber (Thyagarajan & Ghatak, 2007). (Thyagarajan & Ghatak, 2007). Light is guided through the fiber because the core has a
Figure 2.1: Basic structure of an optical fiber (Thyagarajan & Ghatak, 2007). (Thyagarajan & Ghatak, 2007). Light is guided through the fiber because the core has a
peak wavelength shift that results from a changing parameter in the sensor’: Figure 2.2: Various applications for fiber optic sensors
peak wavelength shift that results from a changing parameter in the sensor’: Figure 2.2: Various applications for fiber optic sensors
Figure 2.3: Fiber shaping methods (a) Focused ion beam direct machining, (b) tapering and (c) side-polishing (Joe et al., 2018).
Figure 2.3: Fiber shaping methods (a) Focused ion beam direct machining, (b) tapering and (c) side-polishing (Joe et al., 2018).
Figure 2.5: Fiber optics sensors fabrication processes. dependent on the parameters of its surroundings, which behaves now as part of the
Figure 2.5: Fiber optics sensors fabrication processes. dependent on the parameters of its surroundings, which behaves now as part of the
Figure 2.6: Tapered fiber regions and dimensions (Y. Tian et al., 2011).
Figure 2.6: Tapered fiber regions and dimensions (Y. Tian et al., 2011).
Figure 2.8: Evanescent mode in tapered fiber (Garcia-Fernandez et al., 2011). surrounding environment. The increased sensitivity of the tapered fiber makes it perfec Fernandez et al., 2011). This makes the fiber highly responsive to any changes in its
Figure 2.8: Evanescent mode in tapered fiber (Garcia-Fernandez et al., 2011). surrounding environment. The increased sensitivity of the tapered fiber makes it perfec Fernandez et al., 2011). This makes the fiber highly responsive to any changes in its
since fiber optics are immune to electromagnetic interference, works well in volatile
since fiber optics are immune to electromagnetic interference, works well in volatile
.dditionally, the relative humidity in the chamber is measured using an electronic which humidity is steadily increasing using saturated salts (Sodium Hydroxide).
.dditionally, the relative humidity in the chamber is measured using an electronic which humidity is steadily increasing using saturated salts (Sodium Hydroxide).
Figure 3.3: The Power output of various tapering diameters with varying humidity.
Figure 3.3: The Power output of various tapering diameters with varying humidity.
linearity, standard deviation, and resolution. Standard deviation was calculated from
linearity, standard deviation, and resolution. Standard deviation was calculated from
In this chapter, the tapering method and experiment setup were presented. The stage of the experiment to study the effectiveness of the coating materials.
In this chapter, the tapering method and experiment setup were presented. The stage of the experiment to study the effectiveness of the coating materials.
Figure 4.1: Experiment setup for testing the PVA coated and PMMA coated tapered fiber.
Figure 4.1: Experiment setup for testing the PVA coated and PMMA coated tapered fiber.
the power output of the sensor as the relative humidity was gradually increasing in the Figure 4.2: The power output of uncoated tapered fiber with 2.6 um diameter with varying humidity. before and after coating with PVA and PMMA is presented. For each step, we recorded
the power output of the sensor as the relative humidity was gradually increasing in the Figure 4.2: The power output of uncoated tapered fiber with 2.6 um diameter with varying humidity. before and after coating with PVA and PMMA is presented. For each step, we recorded
Figure 4.3: The power output of PVA coated tapered fiber with 2.6 diameter with varying humidity.
Figure 4.3: The power output of PVA coated tapered fiber with 2.6 diameter with varying humidity.
Additionally, table 4.1 compares the performance of the three samples. We see
Additionally, table 4.1 compares the performance of the three samples. We see
Three runs of the experiment were conducted on all the samples. From graphs
Three runs of the experiment were conducted on all the samples. From graphs
Figure 4.8: The power output of PMMA coated tapered fiber in three runs.
Figure 4.8: The power output of PMMA coated tapered fiber in three runs.
sensors are more suitable for constructing relative humidity sensors. presented in figures 4.12 and 4.13. This shows that PVA coated relative humidity
sensors are more suitable for constructing relative humidity sensors. presented in figures 4.12 and 4.13. This shows that PVA coated relative humidity