Two-Frequency Intensity Fluctuations In A Random Medium

Boaz Lerner; Moshe Tur; Z. Azar

doi:10.1117/12.951095

5 July 1989 Two-Frequency Intensity Fluctuations In A Random Medium

Boaz Lerner, Moshe Tur, Z. Azar

Proceedings Volume 1038, 6th Mtg in Israel on Optical Engineering; (1989) https://doi.org/10.1117/12.951095
Event: Sixth Meeting of Optical Engineering in Israel, 1988, Tel Aviv, Israel

Abstract

The two-color correlation of scintillations was experimentally measured in a laboratory-generated random medium. The aperture averaging effect was examined by measuring the normalized spectral covari-ance and the correlation coefficient for He-Ne and Argon laser beams. Measurements were taken for several strengths of the refractive index inhomogeneities but saturation was not reached. Aperture averaging was significant and its effect on the variances and covariance became more prominent as the the strength of the refractive index inhomogeneities increased. The correlation coefficient was found to increase with the aper-ture diameter from 0.8 at the smallest aperture (0.1mm) up to almost unity at a detector diameter on the order of [Wavelength-Range]^1/2. Also, the correlation coefficient decreased as the wavelength difference between the lasers increased.

Citation Download Citation

Boaz Lerner, Moshe Tur, and Z. Azar "Two-Frequency Intensity Fluctuations In A Random Medium", Proc. SPIE 1038, 6th Mtg in Israel on Optical Engineering, (5 July 1989); https://doi.org/10.1117/12.951095

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