LASER FOR TIME-AVERAGE HOLOGRAPHIC INTERFEROMETER

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$50,000.00
Award Year:
1987
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
5185
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Candela Laser Corpon
19 Strathmore Rd, Natick, MA, 01760
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
() -
Business Contact:
Harry Ceccon
Investigator
() -
Research Institution:
n/a
Abstract
HETERODYNE HOLOGRAPHIC INTERFEROMETRY AND TIME-AVERAGE HOLOGRAPHY WITH A FREQUENCY SHIFTED BEAM HAVE BEEN PROPOSED FOR USE IN THE MEASUREMENT AND VISUALIZATION OF INTERNAL TRANSONIC FLOWS. A LONG PULSE FLASHLAMP EXCITED DYE LASER HAS BEEN SHOWN TO PRODUCE OVER 50 MILLIJOULES PER PULSE FOR OVER 50 MICROSECONDS TO PRODUCE FRINGES WITH A COHERENCE LENGTH IN THE ORDER OF 30 CM. ALTHOUGH TEMPORAL COHERENCE IS GOOD, SPATIAL COHERENCE OVER THE LASER BEAM APERTURE IS POOR. A PLAN TO INCREASE SPATIAL COHERENCE BY IMPROVING THELASER RESONATOR DESIGN IS PROPOSED. WITH THIS CHANGE THE LONG PULSE FLASHLAMP LASER WILL BE USEFUL FOR TIME-AVERAGE HOLOGRAPHY.

* information listed above is at the time of submission.

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