Correlation-based speckle velocimeter with self-mixing interference in a semiconductor laser diode

Şahin Kaya Özdemir; Satoshi Ito; Shigenobu Shinohara; Hirofumi Yoshida; Masao Sumi

doi:10.1364/AO.38.006859

Correlation-based speckle velocimeter with self-mixing interference in a semiconductor laser diode

Şahin Kaya Özdemir, Satoshi Ito, Shigenobu Shinohara, Hirofumi Yoshida, Masao Sumi

Engineering Science and Mechanics

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

We propose a novel self-mixing laser diode speckle velocimeter based on autocorrelation. The selfmixing laser diode launches and receives reflected light from a moving surface that has a random reflection profile. Some portion of the scattered light backcouples into the laser cavity and causes random intensity variations in the form of speckle signals. These speckle signals obtained from a self-mixing laser diode are processed by use of autocorrelation. The linear relation between the velocity and the reciprocal of the correlation time of the speckle intensity fluctuations allows us to determine the velocity easily if proper calibration is performed. The range of the investigated velocity is 20–450mmys. For an aluminum target that moves at a velocity of 350 mmys, the measurement error is less than 2%.

Original language	English (US)
Pages (from-to)	6859-6865
Number of pages	7
Journal	Applied optics
Volume	38
Issue number	33
DOIs	https://doi.org/10.1364/AO.38.006859
State	Published - Nov 20 1999

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.38.006859

Cite this

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title = "Correlation-based speckle velocimeter with self-mixing interference in a semiconductor laser diode",

abstract = "We propose a novel self-mixing laser diode speckle velocimeter based on autocorrelation. The selfmixing laser diode launches and receives reflected light from a moving surface that has a random reflection profile. Some portion of the scattered light backcouples into the laser cavity and causes random intensity variations in the form of speckle signals. These speckle signals obtained from a self-mixing laser diode are processed by use of autocorrelation. The linear relation between the velocity and the reciprocal of the correlation time of the speckle intensity fluctuations allows us to determine the velocity easily if proper calibration is performed. The range of the investigated velocity is 20–450mmys. For an aluminum target that moves at a velocity of 350 mmys, the measurement error is less than 2%.",

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T1 - Correlation-based speckle velocimeter with self-mixing interference in a semiconductor laser diode

AU - Özdemir, Şahin Kaya

AU - Ito, Satoshi

AU - Shinohara, Shigenobu

AU - Yoshida, Hirofumi

AU - Sumi, Masao

PY - 1999/11/20

Y1 - 1999/11/20

N2 - We propose a novel self-mixing laser diode speckle velocimeter based on autocorrelation. The selfmixing laser diode launches and receives reflected light from a moving surface that has a random reflection profile. Some portion of the scattered light backcouples into the laser cavity and causes random intensity variations in the form of speckle signals. These speckle signals obtained from a self-mixing laser diode are processed by use of autocorrelation. The linear relation between the velocity and the reciprocal of the correlation time of the speckle intensity fluctuations allows us to determine the velocity easily if proper calibration is performed. The range of the investigated velocity is 20–450mmys. For an aluminum target that moves at a velocity of 350 mmys, the measurement error is less than 2%.

AB - We propose a novel self-mixing laser diode speckle velocimeter based on autocorrelation. The selfmixing laser diode launches and receives reflected light from a moving surface that has a random reflection profile. Some portion of the scattered light backcouples into the laser cavity and causes random intensity variations in the form of speckle signals. These speckle signals obtained from a self-mixing laser diode are processed by use of autocorrelation. The linear relation between the velocity and the reciprocal of the correlation time of the speckle intensity fluctuations allows us to determine the velocity easily if proper calibration is performed. The range of the investigated velocity is 20–450mmys. For an aluminum target that moves at a velocity of 350 mmys, the measurement error is less than 2%.

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Correlation-based speckle velocimeter with self-mixing interference in a semiconductor laser diode

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