We have developed a method for remote, accurate calibration of practical length standards (e.g., gauge blocks) using a tandem, low-coherence interferometer developed by the AIST and passing light signals down a single-mode optical fiber. A gauge block of 50 mm length has been calibrated through 3 km single-mode optical fiber. The standard deviation of the calibration was 0.1μm and the result agrees with that of conventional interferometer within the uncertainty of the calibration. To date, the calibration of length standards required artifacts to be sent to the calibration laboratories. Using the developed technology, the artifact can remain in situ at the user's measuring laboratory. We aim to validate the remote calibration process with external organizations in the future.
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| Example of remote calibration system |
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| Relational Information |
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AIST Today Vol. 3, No. 6 (2003) 23
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No.9 Summer 2003
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