Project Title:

Laser For Time-Average Holographic Interferometer

01.03-7373
Project Title:Laser For Time-Average Holographic Interferometer
Company:Candela Laser Corporation
Natick, MA 01760
Principal Investigator:Ceccon, Harry

Abstract:

Hetrodyne holographic interferometry and time-average holography with a frequency
shifted beam have been proposed foruse in the measurement and visualization of internal
transonic flows.  A long pulse flashlamp excited dye laser has been shown to produce
finges with a coherence length in the order of 30 cm.  Although temporal coherence
is good, spatial coherence over the laser beam aperature is poor.  A plan to increase
spatial coherence by improving the laser resonator design is proposed.  With this
change the long pulse flashlamp laser will be useful for time-average holography.