29 March 2000 Vibrations and small displacements measurements using self-mixing techniques with multimode diode lasers
Author Affiliations +
Abstract
In the present study, we show the experimental results that we obtained in order to measure vibrations and small displacements using a self mixing technique. In our experimental set up, we achieved a strong optical feedback with a high power, low cost, multimode laser diode. Sweeping the laser diode injection current, and simultaneously gathering the photomonitor current, we obtained the output power vs. current with a reduction of the current threshold and the increase of the device efficiency due to feedback. Also, we present the signal applied to a PZT and the response on the laser's photodiode, as well as the calibration curve at different amplitudes of the stimulus with their corresponding responses. We have been able to experimentally reproduce the results obtained by modeling for the self-mixing technique applied to measuring vibrations.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Horacio Lamela, Horacio Lamela, Jose I. Santos, Jose I. Santos, } "Vibrations and small displacements measurements using self-mixing techniques with multimode diode lasers", Proc. SPIE 3945, Laser Diodes and LEDs in Industrial, Measurement, Imaging, and Sensors Applications II; Testing, Packaging, and Reliability of Semiconductor Lasers V, (29 March 2000); doi: 10.1117/12.380532; https://doi.org/10.1117/12.380532
PROCEEDINGS
6 PAGES


SHARE
Back to Top