SBIR/STTR Research Award
LASER FOR TIME-AVERAGE HOLOGRAPHIC INTERFEROMETER
Award amount
$50,000Program and phase
SBIR · Phase IAward year
1987Award details
- Awarding agency
- National Aeronautics and Space Administration
- Branch
- Not reported
- Recipient company
- CANDELA CORPORATION
- Proposal award date
- Not reported
- Contract end date
- Not reported
- UEI
- Not reported
- Solicitation number
- Not reported
- Topic code
- Not reported
Research 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.
Technology keywords
Not reported