The power spectrum of the laser intensity is studied when optical feedback in a laser diode is used as a sensing configuration for dynamic light-scattering experiments. We present a theory that relates the power spectrum obtained from standard dynamic light-scattering theory to the intensity power spectrum of the laser. This theory provides a concise description of this sensing technique, also known as self-mixing interferometry, when it is applied to Doppler shift and line-broadening measurements of the backscattered field.
© 2006 Optical Society of America
Photon Correlation and Scattering
Original Manuscript: May 2, 2005
Revised Manuscript: November 28, 2005
Manuscript Accepted: November 29, 2005
Christian Zakian, Mark Dickinson, and Terence King, "Dynamic light scattering by using self-mixing interferometry with a laser diode," Appl. Opt. 45, 2240-2245 (2006)