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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 15 — May. 20, 2009
  • pp: 2915–2923

Self-mixing technique for vibration measurements in a laser diode with multiple modes created by optical feedback

Marta Ruiz-Llata and Horacio Lamela  »View Author Affiliations


Applied Optics, Vol. 48, Issue 15, pp. 2915-2923 (2009)
http://dx.doi.org/10.1364/AO.48.002915


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Abstract

We present experimental and theoretical results obtained from the study of the effects of optical feedback in low-cost Fabry–Perot laser diodes due to the presence of an external cavity created by an external reflective or diffusive vibrating target. Experimental results show that a change in the length of the external cavity produces the well-known amplitude modulation of the optical output power and, depending on the amount of optical feedback, a subperiodicity appears in the amplitude modulation of the output power. The experiments show that the subperiodicity appears independently of the length of the external cavity and is due to mode hopping between different longitudinal laser modes. Numerical analysis focused on the effects observed support that the mode hop occurs between modes whose round-trip phase delay along the external cavity is out of phase, thus producing a subperiodicity of the total amplitude modulation.

© 2009 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(140.5960) Lasers and laser optics : Semiconductor lasers
(280.3420) Remote sensing and sensors : Laser sensors

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 3, 2008
Revised Manuscript: March 19, 2009
Manuscript Accepted: March 27, 2009
Published: May 15, 2009

Citation
Marta Ruiz-Llata and Horacio Lamela, "Self-mixing technique for vibration measurements in a laser diode with multiple modes created by optical feedback," Appl. Opt. 48, 2915-2923 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-15-2915


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References

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