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Conference Paper
Integrated Optical Refractometer Based on Bend Waveguide with Air Trench Structure
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- Authors
- Jin Hwa Ryu, Jaehoon Park, Chan-mo Kang, Youngdal Son, Lee-Mi Do, Kyu-Ha Baek
- Issue Date
- 2015-02
- Citation
- International Conference on Nano-Bio Sensing, Imaging, and Spectroscopy (NBSIS) 2015 (SPIE 9523), pp.1-6
- Publisher
- SPIE
- Language
- English
- Type
- Conference Paper
- Abstract
- This study proposed a novel optical sensor based on a refractometer integrating a bend waveguide and a trench structure. The optical sensor is a planar lightwave circuit (PLC) device involving a bend waveguide with maximum optical loss. A trench structure was aligned with the partially exposed core layera?궗?꽓s sidewall of the bend waveguide, providing a quantitative measurement condition. The insertion losses of the proposed 1 x 2 single-mode optical splitter-type sensor were 4.38 dB and 8.67 dB for the reference waveguide and sensing waveguide, respectively, at a wavelength of 1,550 nm. The optical loss of the sensing waveguide depends on the change in the refractive index of the material in contact with the trench, but the reference waveguide had stable optical propagating characteristic regardless of the variations of the refractive index.
- KSP Keywords
- Bend waveguide, Measurement condition, Optical Splitter, Optical losses, Planar lightwave circuit(PLC), Sensor based, Single mode, Trench structure, insertion loss, optical sensor, quantitative measurement