ABSOLUTE MEASUREMENT OF BASE LINES UP TO 400 M USING TEMPORAL COHERENCE HETERODYNE INTERFEROMETER OF OPTICAL FREQUENCY COMB

• 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:

  _unreg_wc-2012.TC14-O12

Event details: