Refractive index sensitivity measurement of a long-period waveguide grating

Refractive index sensitivity measurement of a long-period waveguide grating

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...

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Veröffentlicht in:IEEE photonics technology letters 2005-09, Vol.17 (9), p.1923-1925
Hauptverfasser: Kwon, M.-S, Shin, S.-Y
Format: Artikel
Sprache:eng
Schlagworte:
Biosensors
Cladding
Gratings
integrated optics
Liquids
Optical filters
optical polymers
Optical sensors
Optical surface waves
optical waveguide filters
Optical waveguides
Pollution measurement
Polymers
Refractive index
Refractivity
sensitivity
Sensor phenomena and characterization
Sensors
Waveguides
Wavelengths
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Beschreibung
Zusammenfassung: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.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2005.853029