OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 39, Iss. 30 — Oct. 20, 2000
  • pp: 5512–5517

High-accuracy measurement of 240-m distance in an optical tunnel by use of a compact femtosecond laser

Kaoru Minoshima and Hirokazu Matsumoto  »View Author Affiliations

Applied Optics, Vol. 39, Issue 30, pp. 5512-5517 (2000)

View Full Text Article

Enhanced HTML    Acrobat PDF (122 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A high-accuracy optical distance meter with a mode-locked femtosecond laser is proposed for distance measurements in a 310-m-long optical tunnel. We measured the phase shift of the optical beat component between longitudinal modes of a mode-locked laser. A high resolution of 50 µm at 240-m distance was obtained without cyclic error correction. The group refractive index of air is automatically extracted to an accuracy of 6 parts per million (ppm) by two-color measurement with the pulses of fundamental and second-harmonic wavelengths. Finally, an absolute mechanical distance of 240 m was obtained to within 8-ppm accuracy by use of a series of beat frequencies with the advantage of a wide range of intermode frequency, together with the results of the two-color measurement.

© 2000 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(140.4050) Lasers and laser optics : Mode-locked lasers
(280.3400) Remote sensing and sensors : Laser range finder
(320.7160) Ultrafast optics : Ultrafast technology

Original Manuscript: November 29, 1999
Revised Manuscript: July 14, 2000
Published: October 20, 2000

Kaoru Minoshima and Hirokazu Matsumoto, "High-accuracy measurement of 240-m distance in an optical tunnel by use of a compact femtosecond laser," Appl. Opt. 39, 5512-5517 (2000)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. M. E. Fermann, A. Galvanauskas, G. Sucha, D. Harter, “Fiber lasers for ultrafast optics,” J. Appl. Phys. B 65, 259–275 (1997). [CrossRef]
  2. J. Rueger, Electronic Distance Measurement (Springer-Verlag, New York, 1990). [CrossRef]
  3. P. Bender, “Laser measurements of long distances,” Proc. IEEE 55, 1039–1045 (1967). [CrossRef]
  4. I. Fujima, S. Iwasaki, K. Seta, “High-resolution distance meter using optical intensity modulation at 28 GHz,” Meas. Sci. Technol. 9, 1049–1052 (1998). [CrossRef]
  5. K. Seta, T. Oh’ishi, S. Seino, “Optical distance measurement using inter-mode beat of laser,” Jpn. J. Appl. Phys. 24, 1374–1375 (1985). [CrossRef]
  6. R. Balhorn, F. Lebovsky, D. Ullrich, “Untersuchungen zur Entfermungsmessung mit Stabilisierten Zweifrequenzlasern,” Technical Report (Physikalisch-Technischen Bundesanstalt Jahresbericht, Braunschweig, Germany, 1974), pp. 151–153.
  7. D. Allan, “Statistics of atomic frequency standards,” Proc. IEEE 54, 221–230 (1966). [CrossRef]
  8. K. E. Im, C. S. Gardner, J. B. Abshire, J. F. McGarry, “Experimental evaluation of the performance of pulsed two-color laser-ranging systems,” J. Opt. Soc. Am. A 4, 820–833 (1987). [CrossRef]
  9. R. Muijlwijk, “Update of the Edlen formulae for the refractive index of air,” Metrologia 25, 189–189 (1988). [CrossRef]
  10. P. Bender, J. Owens, “Correction of optical distance measurements for the fluctuating atmospheric index of refraction,” J. Geophys. Res. 70, 2461–2462 (1965). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited