Compact optical sensor with a self-mixing laser diode for non-contact measurement of ultrasonic vibration

Author

Shinohara, Shigenobu ; Ozdemir, Sahin Kaya ; Kokabu, Yoshinori ; Yoshida, Hirofumi ; Sumi, Masa

Author_Institution

Shizuoka Univ., Hamamatsu, Japan

Volume

3

fYear

2000

fDate

2000

Firstpage

1713

Abstract

Self-mixing interference in a semiconductor laser is employed for the measurement of ultrasonic vibrations. It has been confirmed by numerical simulations and experiments that there is a linear relation between the vibration amplitude and the amplitude of a signal detected from a self-mixing laser diode (SM-LD)-laser diode subject to optical feedback-for vibration amplitudes less than the half-wavelength of the illuminating light. The proposed method is statable for constructing compact and inexpensive optical systems for measurement of ultrasonic vibrations

Keywords

laser feedback; optical sensors; semiconductor lasers; ultrasonic measurement; vibration measurement; compact optical sensor; noncontact measurement; numerical simulations; optical feedback; self-mixing interference; self-mixing laser diode; ultrasonic vibration; vibration amplitude; Diode lasers; Interference; Laser feedback; Numerical simulation; Optical sensors; Semiconductor diodes; Semiconductor lasers; Signal detection; Ultrasonic variables measurement; Vibration measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 2000. IECON 2000. 26th Annual Confjerence of the IEEE

Conference_Location

Nagoya

Print_ISBN

0-7803-6456-2

Type

conf

DOI

10.1109/IECON.2000.972534

Filename

972534