A low-cost, optical feedback laser range-finder with chirp-control

Author

Bosch, T. ; Pavageau, S. ; Alessandro, D.D. ; Servag, N. ; Lodi, V. Annovazzi ; Donat, S.

Author_Institution

ENSEEIHT, Toulouse, France

Volume

2

fYear

2001

fDate

2001

Firstpage

1070

Abstract

A new laser range finder using optical feedback interferometry and wavelength sweep has been developed. Our aim was to design a high-accuracy sensor for operation on short distances, using a low-cost Mach-Zender interferometer to separately measure the chirp of the laser. Experimentally, on a plain diffusing target, at a 10-cm distance, we were able to demonstrate an accuracy of 100 μm. Projected accuracy is down to 20-50 μm

Keywords

Mach-Zehnder interferometers; chirp modulation; laser feedback; laser ranging; light interferometry; 10 cm; absolute distance measurement; chirp-control; high-accuracy sensor; laser rangefinder; low-cost Mach-Zender interferometer; optical feedback interferometry; plain diffusing target; pseudo-periodic signal; semiconductor laser; short distance operation; wavelength sweep; Chirp; Coherence; Frequency; Laser feedback; Optical feedback; Optical interferometry; Optical modulation; Optical sensors; Power lasers; Semiconductor lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE

Conference_Location

Budapest

ISSN

1091-5281

Print_ISBN

0-7803-6646-8

Type

conf

DOI

10.1109/IMTC.2001.928244

Filename

928244