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Optical Measurement Section, NRLM, AIST

I2-stabilized Solid/Semiconductor Lasers for National Standards and Precision Length Measurement

  1. Purpose of Research
    This project aims to establish length standards in APEC region by wavelength stabilized laser and to pervade them. Also, it aims to improve interferometric technology of wavelength standard and its calibration technique so that the length standard can be established by directly using international length stadard of laser wavelength.

  2. Research Institutes
    Japan : National Research Laboratory of Metrology
    Partners
    Malaysia : Standards and Industrial Research Institute of Malaysia
    China : NIM, Shang-Hai Research Institute for Optics and Precise Mechanics, FuhTan University
    Korea : KRISS
    Others : Some interchange opportunities to BIPM (France) , CSIRO (Australia) would be made in order to verify the compatibility to countries inside and outside APEC region.


  3. Share of Researches
    (1) Japan
    Development of wavelength stabilized portable laser
    Technology transfer of interferometric length measurement
    (2) Partners
    Length standard establishment by laser interferometry
    Application to industrial measurements
    Improvement of length measurement and standard

  4. Research Schedule in 1997FY
    (1) Japan
    Development of I2-stabilized portable laser
    Prototype of wavelength stabilized laser diode
    (2) Partners
    Development of an interferometer for line standard measurement (Malaysia)
    Development of crystals for wavelength stabilized solid laser (China)
    Development of wavelength stabilized semiconductor laser (Korea)

  5. Research Activities
    @I2-stabilized He-Ne laser is an international de-facto standard of wavelength. The intercomparisons among advanced countries have been often performed. It is requested to pervade it. A portable I2-stabilized He-Ne laser will be completed in 1996FY.