Materials, Photonic Devices, and Sensors

Integrated optical refractometer based on bend waveguide with air trench structure

[+] Author Affiliations
Jin Hwa Ryu, Bong Kuk Lee, Chan-mo Kang, Youngdal Son, Lee-Mi Do, Kyu-Ha Baek

Electronics and Telecommunications Research Institute, IT Convergence Technology Research Laboratory, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea

Jaehoon Park

Hallym University, Department of Electronic Engineering, 1 Hallymdaehak-gil, Chuncheon 24252, Republic of Korea

Opt. Eng. 54(12), 127101 (Dec 09, 2015). doi:10.1117/1.OE.54.12.127101
History: Received July 27, 2015; Accepted November 4, 2015
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Abstract.  This study proposes an optical sensor based on a refractometer integrating a bend waveguide and a trench structure. The optical sensor is a planar lightwave circuit device involving a bend waveguide with maximum optical loss. A trench structure was aligned with the partially exposed core layer’s sidewall of the bend waveguide, providing a quantitative measurement condition. The insertion losses of the proposed 1×2 single-mode optical splitter-type sensor were 4.38 and 8.67 dB for the reference waveguide and sensing waveguide, respectively, at a wavelength of 1550 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 characteristics regardless of the variations of the refractive index.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Jin Hwa Ryu ; Bong Kuk Lee ; Jaehoon Park ; Chan-mo Kang ; Youngdal Son, et al.
"Integrated optical refractometer based on bend waveguide with air trench structure", Opt. Eng. 54(12), 127101 (Dec 09, 2015). ; http://dx.doi.org/10.1117/1.OE.54.12.127101


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