Laser-self-mixing interferometry in the Gaussian beam approximation: experiments and theory

We analyze the laser-self-mixing process in the Gaussian beam approximation and reformulate the expression of the feedback coefficient C in terms of the effective feedback power coupled back into the laser diode. Our model predicts a twenty-fold increase of the ratio between the maximum and the mini...

Full description

Saved in:
Bibliographic Details
Published inOptics express Vol. 18; no. 10; pp. 10323 - 10333
Main Authors De Lucia, F, Putignano, M, Ottonelli, S, di Vietro, M, Dabbicco, M, Scamarcio, G
Format Journal Article
LanguageEnglish
Published United States 10.05.2010
Subjects
Computer Simulation
Computer-Aided Design
Equipment Design
Interferometry - instrumentation
Lasers, Semiconductor
Light
Models, Statistical
Normal Distribution
Refractometry - instrumentation
Reproducibility of Results
Scattering, Radiation
Online AccessGet full text

Cover

More Information
Summary:We analyze the laser-self-mixing process in the Gaussian beam approximation and reformulate the expression of the feedback coefficient C in terms of the effective feedback power coupled back into the laser diode. Our model predicts a twenty-fold increase of the ratio between the maximum and the minimum measurable displacements judged against the current plane-wave model. By comparing the interaction of collimated or diverging Gaussian laser beams with a plane mirror target, we demonstrate that diverging beams tolerate larger wobbling during the target displacement and allow for measurement of off-axis target rotations up to the beam angular width. A novel method for reconstructing the phase front of the Gaussian beam by self-mixing scanning measurements is also presented.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.18.010323