Directional achromatic laser Doppler anemometer employing powerful diode-pumped fiber lasers

Juergen W. Czarske; Holger Zellmer; K. Plamann; Herbert Welling

doi:10.1117/12.354960

19 July 1999 Directional achromatic laser Doppler anemometer employing powerful diode-pumped fiber lasers

Juergen W. Czarske, Holger Zellmer, K. Plamann, Herbert Welling

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.354960
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

Abstract

Diode pumped fiber lasers are compact reliable light sources and achieve today over 30 W fundamental mode power. Hence, they are attractive for the realization of portable laser Doppler anemometer (LDA) systems with high optical power. We present the application of fiber lasers together with diffraction optics for the realization of a miniaturized achromatic directional LDA system. Different methods for the realization of the directional discrimination of the scattering particle movement were investigated and compared. (1) The use of Bragg cells as frequency shifter and diffractive beam splitter for the realization of a heterodyne technique. (2) The application of a two- wavelength fiber laser and Fourier optical phase shifters for the realization of a homodyne technique. (3) The detection of the position of the scattering particle in the measuring volume by dual-fiber receiving techniques.

Citation Download Citation

Juergen W. Czarske, Holger Zellmer, K. Plamann, and Herbert Welling "Directional achromatic laser Doppler anemometer employing powerful diode-pumped fiber lasers", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.354960

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available