|
Abstract
|
Article Information:
Tapered Optical Fiber Humidity Sensor Coated with Nano-crystalline ZnO Doped with KCI
Sivacoumar Rajalingam, Z.C. Alex and Elizabeth Rufus
Corresponding Author: Sivacoumar Rajalingam
Submitted: August 31, 2014
Accepted: October 12, 2014
Published: March 25, 2015 |
Abstract:
|
In this research study we have targeted to fabricate a tapered optical fiber coated with zinc oxide doped with KCl to improve the humidity sensing capability of zinc oxide. The optical fiber was tapered through chemical etching method by HF acid (49.5%). The nano-crystalline Zinc Oxide (ZnO) was synthesized using single molecular precursor method doped with KCl. The resulting material was characterized with Fourier Transform Infrared spectroscopy (FTIR), X-Ray Diffractometry (XRD) and Scanning Electron Microscopy (SEM). The sensing mechanism of this sensor is based on the change of the optical properties of the coating when the relative humidity increases. The humidity sensing characteristic has been estimated by measuring the Optical Permeability (OP) as a function of percentage of Relative Humidity (%RH) in the ranging from 5 to 98% inside a closed chamber. The tapered optical fiber tested with an overlay coating at the optimal working point achieves better sensitivity. The experimental results show that the 5.7 wt% KCl doped ZnO nano-fibers hold super-rapid response and recovery than normal ZnO coating.
Key words: Chemical etching (HF), evanescent field sensors, KCl nanocrystals, tapered fiber sensor, Zno, ,
|
|
Abstract
|
PDF
|
HTML |
|
Cite this Reference:
Sivacoumar Rajalingam, Z.C. Alex and Elizabeth Rufus, . Tapered Optical Fiber Humidity Sensor Coated with Nano-crystalline ZnO Doped with KCI . Research Journal of Applied Sciences, Engineering and Technology, (9): 715-721.
|
|
|
|
 |
ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
 |
| Information |
|
|
|
|
| Sales & Services |
|
|
|
|
