Accession Number:

ADA465061

Title:

Scintillation Measurements of Broadband 980nm Laser Light in Clear Air Turbulence

Descriptive Note:

Journal article

Corporate Author:

JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s):

• Davidson, F. M.
• Bucaille, S.
• Gilbreath, C.
• Oh, E.

Report Date:

2004-01-01

Pagination or Media Count:

13.0

Abstract:

Intensity scintillation variances and intensity probability density functions PDF were experimentally measured for broad-band 2nm, 980 nm laser light reflected by two corner-cube retro-reflectors as a function of retro-reflector lateral spacing over a short 75 m atmospheric optical path. The PDFs transitioned from broad double peaked beta shaped densities to log-normal ones as the retro-reflector spacing was increased to exceed the optical field lateral coherence length. Specific spacing for a given average atmospheric refractive index structure constant Cn2 eliminated coherent interference between light beams returned by each retro-reflector.

Descriptors:

• *PROBABILITY DENSITY FUNCTIONS
• *BROADBAND
• *SCINTILLATION
• *CLEAR AIR TURBULENCE
• REPRINTS
• DENSITY
• COHERENCE
• BEAMS(RADIATION)
• INTERFERENCE
• INTENSITY
• REFRACTIVE INDEX
• RETROREFLECTORS
• LASER BEAMS

Subject Categories:

• Meteorology
• Statistics and Probability
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE