A Planar Optical Waveguide Sensor for Hydrogen Sulfide Detection

Detection of Trimethylamine Based on a Manganese Tetraphenylporphyrin Optical Waveguide Sensing Element

“…The planar optical waveguide consisted of a substrate, waveguide layer and a cladding layer, and the index of the waveguide layer was higher than that of the substrate and cladding layer. The light entered into the propagating layer according the prism coupling method 29,34 In addition, part of the light would enter the sensitive film in the form of evanescent waves when the light propagates in the waveguide layer. 35 And when the target gas would flow into the small chamber and be exposed with the sensitive layer, as a result the output light intensity would change.…”

Optical waveguide sensor of volatile organic compounds based on PTA thin film

“…The optical sensors have been shown to be safe in explosive environment as well as being applicable even in unusual or extreme conditions [13]. Especially, the optical waveguide (OWG) sensor has attracted considerable attention for monitoring environmental pollution [14,15], industrial processes [16,17], biological fields [18][19][20], and medical diagnostics [21], particularly, for the detection of gaseous elements in trace concentrations [22][23][24], in recent years. This is because, OWG methods for sensing have several merits over other types of sensors, such as the potentials for high sensitivity, fast response time, remote controllability, system compactness, and intrinsically safe detection.…”

Optical Waveguide BTX Gas Sensor Based on Polyacrylate Resin Thin Film

“…This is because they have several advantages over other type of sensors, such as the potential for high sensitivity, rapid response, remote controllability, simple structure, good insulation, easy integrability, etc. (18).…”