Beam profiling at 30 Hz for absolute fluence measurement

Gary T. Forrest

doi:10.1117/12.240420

27 May 1996 Beam profiling at 30 Hz for absolute fluence measurement

Gary T. Forrest

Proceedings Volume 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995; (1996) https://doi.org/10.1117/12.240420
Event: Laser-Induced Damage in Optical Materials: 1995, 1995, Boulder, CO, United States

Abstract

The original SensorPhysics beam profiler introduced in 1990 has been upgraded to utilize standard computers and cameras to capture 640 X 480 images at 30 Hz. These images are analyzed to calculate the peak fluence (J/cm2), beam diameter, total energy, per cent saturation, peak location, centroid location and beam area for a series of pulse. The maximum, minimum and average values are calculated as are the values for the averaged image. Incomplete data is automatically excluded. Data is displayed in a variable sized pane under Windows^TM 3.11. The LaserTest utilizes a combined VGA-framegrabber- memory card to acquire sequential pulses at full resolution at 30 Hz. A SensorPhysics high peak power pyroelectric detector is being integrated into the Windows^TM based platform to allow simultaneous measurement of laser energy on every pulse. A similar approach has been implemented on a self contained notebook computer platform.

Citation Download Citation

Gary T. Forrest "Beam profiling at 30 Hz for absolute fluence measurement", Proc. SPIE 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, (27 May 1996); https://doi.org/10.1117/12.240420

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