Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
권호 표지

Sensitivity Characteristics of Side-Polished Fiber Optic UV Sensor with Optical Intensity Variation

측면연마 광섬유형 자외선센서의 광강도 변화에 따른 감도특성

  • Lee, Dong-Rok (Department of Electronic Engineering, Kyungpook National University) ;
  • Seo, Gyoo-Won (Department of Sensor Engineering, Kyungpook National University) ;
  • Yoon, Jong-Kuk (Department of Sensor Engineering, Kyungpook National University) ;
  • Cho, Kang-Min (Department of Sensor Engineering, Kyungpook National University) ;
  • Kang, Shin-Won (School of Electronic and Electrical Engineering, Kyungpook National University)
  • 이동록 (경북대학교 전자공학과) ;
  • 서규원 (경북대학교 센서공학과) ;
  • 윤종국 (경북대학교 센서공학과) ;
  • 조강민 (경북대학교 센서공학과) ;
  • 강신원 (경북대학교 전자전기공학부)
  • Published : 2004.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

A novel UV sensor was manufactured and characterized using evanescent field coupling between photochromic dye dispersed polymer waveguide and side polished fiber. The spiroxazine (photochromic dye) dispersed polymer was used as planar waveguides. The resonant wavelength was shifted owing to refractive index variation of planar waveguide on exposed UV because of its photo-functional properties. The sensitivities are $1.21{\mu}W/mw$ and $2.75{\mu}W/mw$ when UV intensities increased after exposure times were fixed at 3 seconds and 5 seconds, respectively. Output optical power according to UV intensity increases and saturation time decreases as the intensity of UV radiations increases.

광기능성 색소가 분산된 평면도파로 결합기와 측면연마된 광섬유를 이용한 자외선 센서를 제작하여 광강도 변화에 따른 감도특성을 측정하였다. 광변색성 색소인 스파이록사진이 분간된 폴리머를 평면도파로로 사용하였다. 조사되는 자외선의 강도와 시간에 의해 유효굴절률이 변화하는 성질을 이용하였다. 자외선 조사시간을 3 초와 5 초로 고정한 상태에서 자외선 조사강도를 점차 증가시켰을 때 센서감도가 자각 $1.21{\mu}W/mw$와 $2.75{\mu}W/mw$로 나타났다. 자외선 조사 강도에 따른 출력 광강도의 변화를 측정한 결과 자외선 강도가 클수록 출력 광강도도 증가하고 포화시간은 단축됨을 알 수 있었다.

Keywords

References

  1. J.K.Yoon, S.W.Kim, G.W.Seo, Yun-Sik Yu, Dae-Hyuk Kwon, and S.W.Kang 'Side-Polished Fiber Optic Pressure Sensor based on Stress Optical Property of olymer Planar Waveguide', Sensors and Materials, Vol.14, pp.219-230, 2002
  2. J. M. Topaz et al. 'TAUVEX: UV space teles coep', Ultraviolet Technology IV, Robert E. Huffman Editor, Proc. SPIE. Vol. 1764, pp. 94, 1993 https://doi.org/10.1117/12.140874
  3. R. Hillton Biggs et al. Editor, Stratospheric Ozone Depletion/UV-B Radiation in the Biosphere NATO ASI Series I. Vol 18, pp. 3, 1994
  4. John Jagger, 'Solar-UV actions on living cells', Praeger Publisher, 1985
  5. D. Marcuse, 'Investigation of coupling between a fiber and an infinite slab,' IEEE J. of Lightwave Tech, Vol. 7, No. 1, pp. 122-130, Jan. 1989 https://doi.org/10.1109/50.17744
  6. K. P. Panajotove and Andreev Tz. Andreew, 'Distributed coupling between a single-mode fiber and a planar waveguide,' J. of Opt. Soc. Am. B. Vol. 11, No. 5, pp. 826-834, May 1994 https://doi.org/10.1364/JOSAB.11.000826
  7. W. Johnstone, G. Thursby, D. Moodie, and K. McCallion, 'Fiber-optic refractometer that utilizes multimode waveguide overlay devices,' Optics Lett. Vol 17, No. 21, pp. 1538-1540, Nov. 1992 https://doi.org/10.1364/OL.17.001538
  8. 김상우, '광기능성 폴리며 박막 광도파로의 소산장 결합을 이용한 측면연마형 광섬유 자외선 센서', 경북대학교 대학원 센서공학과 석사학위논문, 2002
  9. 이상민, '광변색성 Spiroxazine 색소 박막의 광학특성', 경북대학교 대학원 염색공학과 석사학위논문, 1999
  10. 김성훈, '기능성 색소', 경북대학교 출판부, 1994
  11. J. C. Crano, R. J. Gugliemetti, 'Organic Photo chromic and Thernochromic Compounds,' Plenum Press, New York, Vol. 1, pp. 85-109, 1999
  12. A. Andreev, Bl. Pantchev, Pantchev, P. Danesh, B. Zafirova, and E. Karakoleva, 'a-Si:H film on side-polished fiber as optical polarizer and narrow-band filter,' Thin Solid Films, Vol. 330, pp. 15-156, 1998 https://doi.org/10.1016/S0040-6090(98)00761-5
  13. Tien-jung Chen and Shu-hsia Chen,'Propagation of lower-order modes in a radially anisotropic cylindrical waveguide with liquid crystal cladding,' IEEE J. of Lightwave Tech. Vol. 13, No. 8, pp. 1698-1705, 1995 https://doi.org/10.1109/50.405312
  14. Ssu-pin Ma and Shiao-min Tseng, 'High-performance side-polished fiber and application asliquid crystal clad fiber polarizers,' J. Lightwave Technol., Vol. 15, No. 8, pp. 1554-1558, Aug. 1997 https://doi.org/10.1109/50.618389
  15. S.W.Kim, G.W.Seo, J.K.Yoon, K.J.Lee, Y.S.Yu, and S.W.Kang, 'Novel UV Sensor Using a Side Polished Single Mode Fiber and Active Planar Waveguide Coupler', Proceedings of the International Sensor Conference 2001, pp.145-146, 2001