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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 21 — Nov. 1, 2013
  • pp: 4331–4334

Multidimensional subwavelength position sensing using a semiconductor laser with optical feedback

Seth D. Cohen, Andrés Aragoneses, Damien Rontani, M. C. Torrent, Cristina Masoller, and Daniel J. Gauthier  »View Author Affiliations

Optics Letters, Vol. 38, Issue 21, pp. 4331-4334 (2013)

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We demonstrate experimentally how to harness quasi-periodic dynamics in a semiconductor laser with dual optical feedback for measuring subwavelength changes in each arm of the cavity simultaneously. We exploit the multifrequency spectrum of quasi-periodic dynamics and show that independent frequency shifts are mapped uniquely to two-dimensional displacements of the arms in the external cavity. Considering a laser diode operating at telecommunication wavelength λ1550nm, we achieve an average nanoscale resolution of approximately 9.8 nm (λ/160).

© 2013 Optical Society of America

OCIS Codes
(280.3420) Remote sensing and sensors : Laser sensors
(250.5960) Optoelectronics : Semiconductor lasers

ToC Category:
Remote Sensing and Sensors

Original Manuscript: July 22, 2013
Revised Manuscript: September 10, 2013
Manuscript Accepted: September 16, 2013
Published: October 21, 2013

Seth D. Cohen, Andrés Aragoneses, Damien Rontani, M. C. Torrent, Cristina Masoller, and Daniel J. Gauthier, "Multidimensional subwavelength position sensing using a semiconductor laser with optical feedback," Opt. Lett. 38, 4331-4334 (2013)

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