Title :
Refractive Index Sensitivity Measurement of a Long-Period Waveguide Grating
Author :
Kwon, Min-Suk ; Shin, Sang-Yung
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
For the application of a long-period waveguide grating (LPWG) to a refractive index (RI) sensor, its RI sensitivity is experimentally investigated. The characteristics of the LPWG made of thermocurable polymers are observed when individual liquids with different RIs cover its cladding surface. They are sensitive to the RI of liquid. For the transverse-magnetic mode, the center wavelength of a resonance band increases by 77.7 nm as the RI of liquid increases from 1.0 to 1.47. The experimental results indicate that the LPWG may be used as an RI sensor.
Keywords :
claddings; curing; diffraction gratings; integrated optics; optical polymers; optical sensors; optical waveguide components; refractive index measurement; cladding surface; integrated optics; long-period grating; refractive index sensitivity measurement; refractive index sensor; resonance band; thermocurable polymers; transverse-magnetic mode; waveguide grating; Biosensors; Gratings; Optical filters; Optical sensors; Optical surface waves; Optical waveguides; Pollution measurement; Polymers; Refractive index; Sensor phenomena and characterization; Gratings; integrated optics; optical polymers; optical waveguide filters; sensitivity;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.853029
