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2001 Fiscal Year Final Research Report Summary

Development of a compact solid-state laser sensor for detecting distributed, low-concentration widely environmental-pollution molecules

Research Project

Project/Area Number 12558058
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Environmental dynamic analysis
Research InstitutionFukui University

Principal Investigator

KOBAYASHI Takao  Graduate School of Engineering, Fukui University, Professor, 大学院・工学研究科, 教授 (90006247)

Co-Investigator(Kenkyū-buntansha) SUGIMOTO Nobuo  National Institute for Environmental Studies, Laboratory chief, 研究室長 (90132852)
KAWATO Sakae  Graduate School of Engineering, Fukui University, Assist. Prof., 大学院・工学研究科, 助教授 (60313730)
Project Period (FY) 2000 – 2001
KeywordsAtmospheric minor molecules / Long-path absorption laser radar / LD pumped OPO / Infrared wavelength / Widely frequency tunable / Topographic target
Research Abstract

In this research, a long-path absorption laser system has been developed as a remote sensor of low-concentration atmospheric molecules related to environmental pollution and global warming issues. The compact optical parametric oscillator (OPO) has been constructed for generating tunable infrared pulse beam of 20ns pulse width, 1〜10kHz pulse repetition frequency, 175MHz spectral width, 10〜150mW average power with single and stabilized frequency in the wavelength range of 1.50〜1.93μm and 2.36〜3.68μm. Using the long-path absorption laser radar, the atmospheric methane has been measured using a rough-surface topographic target at 150m range with the signal-to-noise ratio of 100, and the absorption accuracy of 10^<-2> in 1s integration time.
Further improvement is possible in the system characteristics by increasing the laser efficiency and reducing the system noise to realize estimated ideal performance. Other molecules such as CO_2 and N_2O are possible to be detected with this system scheme.
Application field of this sensor system covers 1) measurement of wide-area molecular density and spatial integrated height distribution using proper targets over the traffic loads, factories, airports and urban area, 2) new mobile systems based on a compact car and airplane are possible to measure transport characteristics of global air pollution and atmospheric environmental properties In a higher pulse energy model

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] D.Shen, S.Tam, T.Kobayashi: "Diode-pumped passively Q-switched single-frequency Nd ; YAG lasers"Optical Review. 7. 451-454 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Shen, S.Tam, Y.Lam, T.Kobayashi: "Singly resonant optical parametric oscillator based on periodically poled MgO : LiNbO_3"Electronics Letters. 17. 1488-1489 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kobayashi, Y.Mizoguchi, T.Matsumura, S.Kawato: "Development of compact direct-detection Doppler lidar system for wind profiling"Proc. of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. 329-337 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小林喬郎: "レーザーレーダー:地球環境のリモートセンシング"光学. 31. 176-184 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Imaki, D.Sun, T.Kobayashi: "Direct detection Doppler lidar for two dimensional wind field measurements of the troposphere"Proc. of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] D.Hua, M.Uchida, M.Imaki, T.Kobayashi: "Development of practical UV Rayleigh lidar for measuring atmospheric temperature profiles in the troposphere"Proc. of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A. Minato, T. Kobayashi and N. Sugimoto: "Laser long-path absorption lidar technique for measuring methane using gas correlation method"Jpn. J. Appl. Phys. Vol.37. 3610-3613 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] D. Shen, C. Li, J. Song, T. Kobayashi and K. Ueda: "Diode-pumped Nd : S-VAP lasers passively Q-switched with Cr4+ : YAG saturable absorber"Optics Communications. Vol.169. 109-113 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] D. Shen, S. Tam and T. Kobayashi: "Diode-pumped passively Q-switched single-frequency Nd : YAG lasers"Optical Review. Vol.7, No.5. 451-454 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] D. Shen, S. Tam, Y. Lam and T. Kobayashi: "Singly resonant optical parametric oscillator based on periodically poled MgO : LiNbO_3"Electronics Letters. Vol.36, No.17. 1488-1489 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kobayashi: "Overview of lidar technology for industrial and environmental monitoring in Japan"Proc. Of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. Invited paper. 1-4 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kobayashi, Y. Mizoguchi, T.Matsumura and S. Kawato: "Development of compact direct-detection Doppler lidar system for wind profiling"Proc. Of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. 329-337 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takao Kobayashi: "Laser radar : Remote sensing of the earth environment"Kougaku (Optics). Vol.31, No.3. 176-184 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Imaki, D. Sun and T. Kobayashi: "Direct detection Doppler lidar for two dimensional wind field measurements of the troposphere"Proc. Of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] D. Hua, M. Uchida, M. Imaki and T. Kobayashi: "Development of practical UV Rayleigh lidar for measuring atmospheric temperature profiles in the troposphere"Proc. Of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kobayashi, K. Takeuchi, M. Morimoto, T. Tada and S. Kawato: "Compact tunable absorption laser radar for sensing global warming molecules"Technical Digest of CRL International Symposium on Light Propagation and Sensing Technologies for Future Applications. 65 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Imaki, T. Tada, T. Higashikawa, A. Hayashi and T. Kobayashi: "Compact long-path absorption laser radar system for measuring greenhouse molecular concentration"CLEO / Pacific Rim 2003. (Taipei, Taiwan) (2003.7, to be published).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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