• 제목/요약/키워드: linear thermo-optic effect

검색결과 5건 처리시간 0.017초

광 온도센서의 열전.광 효과 (Thermo-optic Effects of Optical Temperature Sensor)

  • 이광석;김현덕
    • 한국정보통신학회논문지
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    • 제10권11호
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    • pp.2049-2054
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    • 2006
  • 본 연구는 에칭된 실리카 기반의 평면 도파로 Bragg grating에 기반한 광 온도센서의 열전 광 효과에 대한 선형 및 비선형 해석에 대하여 제시하였다. 또한, 에칭된 평면 도파로 Bragg grating 광 온도센서의 이론적인 해석과 실험을 행하고 그 결과를 나타내었다. 도파로에 기반한 grating응답에 대하여 선형 온도 효과보다 비선형의 이론적 모델과 plate deformation이론이 허용오차 범위 내에서의 실험치와 일치함을 알 수 있었다.

Thermo-optic Effects of Bragg Grating Optical Temperature Sensor

  • Ahn, Kook-Chan;Lee, Sang-Mae;Lee, Gwang-Seok;Park, Seung-Bum
    • International Journal of Aeronautical and Space Sciences
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    • 제3권2호
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    • pp.24-30
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    • 2002
  • This paper demonstrates a comparison of linear and nonlinear analyses for thermo-optic effects of optical temperature sensor based on the etched silica-based planar waveguide Bragg grating. Topics include theoretical analyses and experiment of the etched planar waveguide Bragg grating optical temperature sensor. Theoretical models with nonlinear than linear temperature effect for the grating response based on waveguide and plate deformation theories agree with experiments to within acceptable tolerance.

평면 광도파로 상의 식각 브래그 격자를 이용한 광온도 센서의 개발 (Optical Temperature Sensor Based on the Etched Planar Waveguide Bragg Grating Considering Linear Thermo-optic Effect)

  • Kook-Chan Ahn;Sang-Mae Lee
    • 한국안전학회지
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    • 제16권2호
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    • pp.121-129
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    • 2001
  • 본 논문은 식각된 평면 광도파 브래그 격자를 이용한 광온도 센서의 개발에 대한 연구로써 식각된 평면 도파로 브래그 격자의 설계, 제작, 격자 특성 연구 및 온도 측정 가능성을 주 연구 목적으로 하고 있다. 평면 식각 브래그 격자 센서의 전형적 대역폭과 그 반사도는 각각 ~l,522nm의 파장에서 ~0.2nm와 ~7%이며, 20$0^{\circ}C$까지 온도가 변화하는 동안 온도 변화에 따른 브래그 파장의 변화는 약간의 비선형성을 보였다. 광도파로와 판변형이론에 기초한 브래그 격자의 온도 변화에 따른 광파장 응답을 예측하기 위한 이론적 모델은 실험과 비교할 때 허용 오차내에서 잘 일치하고 있다.

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Planar Optical Waveguide Temperature Sensor Based on Etched Bragg Gratings Considering Nonlinear Thermo-optic Effect

  • Ahn, Kook-Chan;Lee, Sang-Mae;Jim S. Sirkis
    • Journal of Mechanical Science and Technology
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    • 제15권3호
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    • pp.309-319
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    • 2001
  • This paper demonstrates the development of optical temperature sensor based on the etched silica-based planar waveguide Bragg grating. Topics include design and fabrication of the etched planar waveguide Bragg grating optical temperature sensor. The typical bandwidth and reflectivity of the surface etched grating has been ∼0.2nm and ∼9%, respectively, at a wavelength of ∼1552nm. The temperature-induced wavelength change is found to be slightly non-linear over ∼200$^{\circ}C$ temperature range. Typically, the temperature-induced fractional Bragg wavelength shift measured in this experiment is 0.0132nm/$^{\circ}C$ with linear curve fit. Theoretical models with nonlinear temperature effect for the grating response based on waveguide and plate deformation theories agree with experiments to within acceptable tolerance.

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The Development of Optical Temperature Sensor Based on the Etched Bragg Gratings

  • Ahn, Kook-Chan;Lee, Sang-Mae
    • International Journal of Aeronautical and Space Sciences
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    • 제2권2호
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    • pp.56-64
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    • 2001
  • An optical temperature sensor based on the etched planar waveguide Bragg grating is developed and its performance is explored using theoretical and experimental methods. The planar waveguide is designed and fabricated using optical lithography and wet chemical etching. An efficient butt coupled optical fiber is used to examine the spectral characteristics of the grating sensor, and to investigate the grating parameters. The typical bandwidth and reflectivity of the surface etched grating has been ~0.2 nm and ~7%, respectively, at a wavelength of ~1,552 nm. The temperature-induced wavelength change of the optical sensor is found to be slightly non-linear over ${\sim}200^{\circ}C$ temperature range. Theoretical models for the grating response of the sensor based on waveguide and classical laminated plate deformation theories agree with experiments to within acceptable tolerance.

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