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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 4 — Feb. 1, 2010
  • pp: 714–717

Superheterodyne configuration for two-wavelength interferometry applied to absolute distance measurement

Sébastien Le Floch, Yves Salvadé, Nathalie Droz, Rostand Mitouassiwou, and Patrick Favre  »View Author Affiliations


Applied Optics, Vol. 49, Issue 4, pp. 714-717 (2010)
http://dx.doi.org/10.1364/AO.49.000714


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Abstract

We present a new superheterodyne technique for long-distance measurements by two-wavelength interferometry (TWI). While conventional systems use two acousto-optic modulators to generate two different heterodyne frequencies, here the two frequencies result from synchronized sweeps of optical and radio frequencies. A distributed feedback laser source is injected in an intensity modulator that is driven at the half-wave voltage mode. A radio-frequency signal is applied to this intensity modulator to generate two optical sidebands around the optical carrier. This applied radio frequency consists of a digital ramp between 13 and 15 GHz , with 1 ms duration and with an accuracy of better than 1 ppm . Simultaneously, the laser source is frequency modulated by a current modulation that is synchronized on the radio- frequency ramp as well as on a triangle waveform. These two frequency-swept optical signals at the output of the modulator illuminate a Michelson interferometer and create two distinct distance-dependent heterodyne frequencies on the photodetector. The superheterodyne signal is then detected and bandpass filtered to retrieve the absolute distance measurement. Experiments between 1 and 15 m confirm the validity of this new concept, leading to a distance accuracy of ± 50 μm for a 1 ms acquisition time.

© 2010 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3518) Lasers and laser optics : Lasers, frequency modulated

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: November 11, 2009
Manuscript Accepted: January 7, 2010
Published: January 27, 2010

Citation
Sébastien Le Floch, Yves Salvadé, Nathalie Droz, Rostand Mitouassiwou, and Patrick Favre, "Superheterodyne configuration for two-wavelength interferometry applied to absolute distance measurement," Appl. Opt. 49, 714-717 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-4-714


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References

  1. R. Dändliker, R. Thalmann, and D. Prongué, “Two-wavelength laser interferometry using superheterodyne detection,” Proc. SPIE 813, 9-10 (1987).
  2. R. Dändliker, R. Thalmann, and D. Prongué, “Two-wavelength laser interferometry using superheterodyne detection,” Opt. Lett. 13, 339-341 (1988). [CrossRef]
  3. Y. Salvadé, N. Schuler, S. Lévêque, and S. Le Floch, “High-accuracy absolute distance measurements using frequency comb referenced multi-wavelength source,” Appl. Opt. 47, 2715-2720 (2008). [CrossRef]
  4. E. Gelmini, U. Minoni, and F. Docchio, “Tunable, double-wavelength heterodyne detection interferometer for absolute distance measurement,” J. Opt. 29, 179-182 (1998). [CrossRef]
  5. S. Le Floch and Y. Salvadé, “Radio-frequency controlled synthetic wavelength sweep for absolute distance measurement by optical interferometry,” Appl. Opt. 47, 3027-3031 (2008). [CrossRef]
  6. Z. Sodnik, E. Fischer, T. Ittner, and H. Tiziani, “Two-wavelength double heterodyne interferometry using a matched grating technique,” Appl. Opt. 30, 3139-3144 (1991). [CrossRef]
  7. P. de Groot and J. McGarvey, “Method and apparatus for use in measuring frequency difference between light signals,” U.S. patent 5,493,394 (1996).
  8. A. Hilt, “Microwave harmonic generation in fiber-optical links,” J. Telecomm. Inf. Technol. 1, 22-28 (2002).
  9. O. P. Lay, S. Dubovitski, R. D. Peters, and J. P. Burger, “MSTAR: a submicrometer absolute metrology system,” Opt. Lett. 28, 890-892 (2003). [CrossRef]
  10. H. Shalom, A. Zadok, M. Tur, P. Legg, W. D. Cornwell, and I. Andonovic, “On the various time constants of wavelength changes of a DFB laser under direct modulation,” IEEE J. Quantum Electron. 34, 1816-1822 (1998). [CrossRef]
  11. J. Ye, “Absolute measurement of a long, arbitrary distance to less than an optical fringe,” Opt. Lett. 29, 1153 (2004). [CrossRef]
  12. M. Cui, S. A. van der Berg, J. J. M. Braat, and N. Bhattacharya, “Absolute distance measurement using a frequency comb,” European Optical Society Annual Meeting 2006, M. N. Armenise, ed. (European Optical Society, 2006), pp. 70-71.
  13. K. P. Birch and M. J. Downs, “Correction to the updated Edlen equation for the refractive index of air,” Metrologia 31, 315-316 (1994). [CrossRef]
  14. R. Dändliker and Y. Salvadé, “Multiple wavelength interferometry for absolute distance measurement,” in International Trends in Optics and Photonics-ICO IV, T. Asakura, ed., Vol. 74 of Springer Series in Optical Sciences (Springer, 1999), pp. 294-317.

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