LASER FOR TIME-AVERAGE HOLOGRAPHIC INTERFEROMETER

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 5185
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1987
Solitcitation Year: N/A
Solitcitation Topic Code: N/A
Solitcitation Number: N/A
Small Business Information
Candela Laser Corpon
19 Strathmore Rd, Natick, MA, 01760
Duns: N/A
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 () -
Business Contact
 Harry Ceccon
Title: Investigator
Phone: () -
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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