ABSOLUTE MEASUREMENT OF BASE LINES UP TO 400 M USING TEMPORAL COHERENCE HETERODYNE INTERFEROMETER OF OPTICAL FREQUENCY COMB |
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| H. Matsumoto, X. Wang, K. Takamasu |
- Abstract:
- A heterodyne interference system is developed for base-lines measurement by using an acoustic optical modulator and a stabilized optical-frequency comb. The temporal coherence interference with the optical-frequency comb happen at discrete positions, where a pair of pulse trains overlaps with each other. An optical delay of the interferometer with a piezo-electric transducer is realized to find the peak position of interference fringe pattern and the absolute distance is obtained with a high accuracy. The interferometer is applied to a distance of base-lines up to 403 m and the experimental result shows of possibility of measuring within an accuracy of several micrometers.
- Keywords:
- optical frequency comb, absolute distance measurement, temporal coherence interferometry, heterodyne interferometry
- Download:
- IMEKO-WC-2012-TC14-O12.pdf
- DOI:
- -
- Event details
- Event name:
- XX IMEKO World Congress
- Title:
Metrology for Green Growth
- Place:
- Busan, REPUBLIC of KOREA
- Time:
- 09 September 2012 - 12 September 2012