A study on self-mixing speckle velocimeter: Detection geometry and aperture effects

Isao Ohno, Sahin Ozdemir, Shigenobu Shinohara, Hirofumi Yoshida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effect of geometry detection schemes and apertures on self-mixing speckle velocimeters was studied. The measurement system consisted of a heterojunction AlGaAs laser diode, a GRIN lens and a target surface placed on a translating stage. A moving rough surface was used to scatter the light emitted from laser diode into laser cavity to analyze self-mixing interference. A photodiode was also used to detect random variations in light intensity of self-mixing speckle signals. Analysis suggested that the use of self-mixing laser diode with larger detection and coupling apertures eliminated offset value and avoided critical velocity.

Original languageEnglish (US)
Title of host publicationPacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest
Volume2
StatePublished - Dec 1 2001
Event4th Pacific Rim Conference on Lasers and Electro-Optics - Chiba, Japan
Duration: Jul 15 2001Jul 19 2001

Other

Other4th Pacific Rim Conference on Lasers and Electro-Optics
CountryJapan
CityChiba
Period7/15/017/19/01

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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