Self-mixing diode laser interferometry for velocity measurements of different targets

Alexandra S. Alexandrova; Vasilis Tzoganis; Carsten P. Welsch

doi:10.1117/12.2057827

15 May 2014 Self-mixing diode laser interferometry for velocity measurements of different targets

Alexandra S. Alexandrova, Vasilis Tzoganis, Carsten P. Welsch

Proceedings Volume 9141, Optical Sensing and Detection III; 91412C (2014) https://doi.org/10.1117/12.2057827
Event: SPIE Photonics Europe, 2014, Brussels, Belgium

Abstract

Supersonic gas jets can be used as a profile monitor for charged particle beams, as well as a cold target for collision experiments. For the optimisation of these experiments, it is important to know the velocity and density distribution of the jet. In these applications, gas jet velocities can be up to 2000 m/s. A diode laser velocimeter based on laser self-mixing method is currently being developed as an easy to build and compact alternative measurement technique. The technique seems a promising way for a complete characterisation of the gas jet parameters. It should be pointed out, however, that laser self-mixing is usually used for measurement of low velocities and vibrations. In this contribution, the heterodyne principle and design of the laser diode velocimeter are first discussed. The laser velocimeter is a self-aligning device, based on the self-mixing method where the laser is both, transmitter and receiver of the signal. The here presented theoretical analysis shows the possibility to extend measurement capabilities also to high velocities by altering the design. Experimental results from measurements with different targets are presented. The set-up for testing the sensor allows investigations into the limitation of the method to be made as well as the amount of feedback which is required for a detailed study of a gas jet.

Citation Download Citation

Alexandra S. Alexandrova, Vasilis Tzoganis, and Carsten P. Welsch "Self-mixing diode laser interferometry for velocity measurements of different targets", Proc. SPIE 9141, Optical Sensing and Detection III, 91412C (15 May 2014); https://doi.org/10.1117/12.2057827

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