Displacement measurement of optically trapped particles by a laser diode phase sensor

Author

Uchiyama, Toshio ; Lai, Guanming

Author_Institution

Shizuoka Univ., Japan

Volume

3

fYear

1998

fDate

12-15 Oct. 1998

Firstpage

1686

Abstract

A method of sensing single particles in liquid using a diode laser for both trapping and phase measurement is proposed. Optical trapping makes it possible to fix a single particle in liquid and optical feedback effect of the laser diode is used to measure the wave-front of the scattered light. An analysis method of obtaining the position information from the laser intensity signal is described. Experimental results of measured displacement of optically trapped particles by the proposed phase sensing method are shown.

Keywords

displacement measurement; light scattering; measurement by laser beam; optical feedback; phase measurement; semiconductor lasers; displacement measurement; laser diode phase sensor; laser intensity signal; liquid; optical feedback effect; optical trapping; optically trapped particles; phase sensing method; scattered light wave-front measurement; single particles sensing; Charge carrier processes; Diode lasers; Displacement measurement; Laser feedback; Light scattering; Optical feedback; Optical scattering; Optical sensors; Particle measurements; Phase measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1998. Thirty-Third IAS Annual Meeting. The 1998 IEEE

Conference_Location

St. Louis, MO, USA

ISSN

0197-2618

Print_ISBN

0-7803-4943-1

Type

conf

DOI

10.1109/IAS.1998.729786

Filename

729786