Second harmonic measurement of multi-beam laser heterodyne with ultra-precision for the small angle

Y. Chao Li; Q. Ding; Y. Qiao Wang; J. Ru Yang; C. Yu Liu; C. Hui Wang; J. Feng Sun

doi:10.1117/12.2193855

22 August 2015 Second harmonic measurement of multi-beam laser heterodyne with ultra-precision for the small angle

Y. Chao Li, Q. Ding, Y. Qiao Wang, J. Ru Yang, C. Yu Liu, C. Hui Wang, J. Feng Sun

Proceedings Volume 9656, International Symposium on Photonics and Optoelectronics 2015; 965603 (2015) https://doi.org/10.1117/12.2193855
Event: International Symposium on Photonics and Optics, 2015, Shanghai, China

Abstract

In order to improve the measurement accuracy of the angle and signal processing speed of operation, this paper proposes a novel method of second harmonic measurement of multi-beam laser heterodyne for the angle, which based on the combination of Doppler effect and heterodyne technology, loaded the information of the angle to the frequency difference of second harmonic of the multi-beam laser heterodyne signal by frequency modulation of the oscillating mirror, which is in the light path. Heterodyne signal frequency can be obtained by fast Fourier transform, and can obtain values of the angle accurately after the multi-beam laser heterodyne signal demodulation. This novel method is used to simulate measurement for incident angle of standard mirror by Matlab, the obtained result shows that the relative measurement error of this method is just 0.5213%.

Citation Download Citation

Y. Chao Li, Q. Ding, Y. Qiao Wang, J. Ru Yang, C. Yu Liu, C. Hui Wang, and J. Feng Sun "Second harmonic measurement of multi-beam laser heterodyne with ultra-precision for the small angle", Proc. SPIE 9656, International Symposium on Photonics and Optoelectronics 2015, 965603 (22 August 2015); https://doi.org/10.1117/12.2193855

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