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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 10, Iss. 12 — Dec. 1, 2012
  • pp: 121404–121404

Self-mixing interferometry based on nanometer fringes and polarization flipping

Zhaoli Zeng, Shulian Zhang, Shoushen Zhu, Wenxue Chen, and Yan Li  »View Author Affiliations


Chinese Optics Letters, Vol. 10, Issue 12, pp. 121404-121404 (2012)


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Abstract

Self-mixing interferometry (SMI) based on nanometer fringes and polarization flipping is realized. The interferometer comprises a single-mode He-Ne laser and a high-amplitude reflectivity feedback mirror. The nanometer fringes are obtained by tilting the external feedback mirror. The fringe density is 35 times higher than that derived with conventional two-beam interference, and each fringe corresponds to a λ/70 displacement in external cavity length. Moreover, polarization flipping occurs when the external feedback mirror moves in the opposite direction. Such movement can be used to easily distinguish displacement direction. Experimental results show an optical resolution of displacement measurement of 9.04 nm with a range of 100 µm. The proposed SMI presents promising application prospects in precisely measuring displacement and calibrating other micro-displacement sensors because of its optical wavelength traceability.

© 2012 Chinese Optics Letters

OCIS Codes
(140.1340) Lasers and laser optics : Atomic gas lasers
(260.1440) Physical optics : Birefringence
(260.3160) Physical optics : Interference

ToC Category:
Lasers and Laser Optics

Citation
Zhaoli Zeng, Shulian Zhang, Shoushen Zhu, Wenxue Chen, and Yan Li, "Self-mixing interferometry based on nanometer fringes and polarization flipping," Chin. Opt. Lett. 10, 121404-121404 (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-12-121404

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