Multidimensional subwavelength position sensing using a semiconductor laser with optical feedback.


Journal Article

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 λ≈1550 nm, we achieve an average nanoscale resolution of approximately 9.8 nm (~λ/160).

Full Text

Duke Authors

Cited Authors

  • Cohen, SD; Aragoneses, A; Rontani, D; Torrent, MC; Masoller, C; Gauthier, DJ

Published Date

  • November 2013

Published In

Volume / Issue

  • 38 / 21

Start / End Page

  • 4331 - 4334

PubMed ID

  • 24177086

Pubmed Central ID

  • 24177086

Electronic International Standard Serial Number (EISSN)

  • 1539-4794

International Standard Serial Number (ISSN)

  • 0146-9592

Digital Object Identifier (DOI)

  • 10.1364/ol.38.004331


  • eng