Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Measurement of Brillouin Gain Spectrum of Optical Fiber Using Direct Optical Frequency Modulation of Laser Diode

레이저 다이오드의 직접 광주파수 변조를 이용한 광섬유의 브릴루앙 이득 스펙트럼 측정

  • Published : 2006.04.01
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Abstract

A new method of measuring the Brillouin gain spectrum of optical fiber is proposed and demonstrated. Unlike existing methods, both the pump light and the counter-propagating probe light are generated from a single laser diode whose optical frequency is directly modulated by injection current modulation. The frequency difference between the pump and the probe is scanned continuously through optical frequency chirp occurring when the injection current is modulated with a square wave. The measured Brillouin gain spectrum of telecom single-mode fiber agrees well with that shown in other literature.

광섬유 내 브릴루앙 산란의 이득 스펙트럼을 측정하는 새로운 방법을 제안하고 실험하였다. 기존의 측정 방식과는 달리, 주입전류를 직접 변조하여 광주파수 변조된 하나의 레이저 다이오드로부터 펌프광과 프로브광을 발생시키고, 주입전류를 사각파로 변조할 때 나타나는 광주파수 처핑을 이용하여 펌프/프로브간 광주파수 차이를 연속적으로 변화시키는 방법으로 브릴루앙 이득 스펙트럼을 측정하였다. 통신용 단일모드 광섬유의 브릴루앙 이득 스펙트럼을 측정하여 기존 문헌의 결과와 거의 일치하는 결과를 얻었다.

Keywords

References

  1. G. P. Agrawal, Nonlinear Fiber Optics (Academic Press, U.S.A., 1995), pp. 370-384
  2. T. Horiguchi, T. Kurashima, and M. Tateda, 'Tensile strain dependence of Brillouin frequency shift in silica optical fibers,' IEEE Photon. Technol. Lett., vol. 1, no. 5, pp. 107-108, 1989 https://doi.org/10.1109/68.34756
  3. Kellie Brown, Anthony W. Brown and Bruce G. Colpitts, 'Characterization of optical fibers for optimization of a Brillouin scattering based fiber optic sensor,' Opt. Fiber Technol, vol. 11, no. 2, pp. 131-145, 2005 https://doi.org/10.1016/j.yofte.2004.08.004
  4. D. Culverhouse, F. Farahi, C. N. Pannel, and D. A. Jackson, 'Potential of stimulated Brillouin scattering as sensing mechanism for distributed temperature sensors,' Electron. Lett., vol. 25, no. 14, pp. 913-915, 1989 https://doi.org/10.1049/el:19890612
  5. X. Bao, D. J. Webb, and D. A. Jackson, '22-km distributed temperature sensor using Brillouin gain in an optical fiber,' Opt. Lett., vol. 18, no. 7, pp. 552-554, 1993 https://doi.org/10.1364/OL.18.000552
  6. Marc Nikles, Luc Thevenaz, and Phillippe A. Robert, 'Brillouin gain Spectrum Characterization in Single-Mode Optical Fibers,' J. Lightwave Technol., vol. 15, no. 10, pp. 1842-1851, 1997 https://doi.org/10.1109/50.633570
  7. Y. Azuma, N. Shibata, T. Horiguchi, and M. Tateda, 'Wavelength Dependence of Brillouin-Gain Spectra for Single-Mode Optical Fibers,' Electron. Lett., vol. 24, no. 5, pp. 250-251, 1988 https://doi.org/10.1049/el:19880168
  8. Z. He and K. Hotate, 'Distributed fiber-optic stress location measurement by arbitrary shaping of optical coherence function,' J. Lightwave Technol., vol. 20, no. 9, pp. 1715-1723, 2002 https://doi.org/10.1109/JLT.2002.802205
  9. 윤승철, 서민성, 박희갑, '직접 광주파수 변조된 레이저 다이오드에서 변조 파형의 비선형 왜곡 측정과 보정,' 제 12회 광전자 및 광통신 학술회의 논문집, 12권, 1호 pp. 51-52, 2005
  10. Y. Koyamada, S. Sato, S. Nakamura, H. Sotobayashi, and W. Chujo, 'Stimulating and Designing Brillouin Gain Spectrum in Single-Mode Fibers,' J. Lightwave Technol., vol. 22, no. 2, pp. 631-639, 2004 https://doi.org/10.1109/JLT.2003.822007
  11. T. Horiguahi, K. Shimizu, T. Kurashima, M. Tateda, and Y. Koyamada, 'Development of Distributed Sensing Technique Using Brillouin Scattering,' J. Lightwave Technol., vol. 13, no. 7, pp. 1296-1302, 1995 https://doi.org/10.1109/50.400684
  12. K. Hotate, and T. Hasegawa, 'A correlation-based continuous-wave technique for measuring Brillouin gain spectrum distribution along an optical fiber with centimeter-order spatial resolution,' Proc. 14th Intern. Conf. on Optical Fiber Sensors, pp. 651-661, 2000