SYMPOSIA PAPER Published: 01 January 1986
STP23108S

Automated Pulsed Testing Using a Scatter-Probe Damage Monitor

Source

This paper describes automated pulsed testing of infrared mirrors based on scatter-probe detection of laser damage. Advantages of our approach are (1) ability to monitor minute changes in surface condition without an observer, (2) rapid sampling of a large matrix of test fluences and test positions on the mirror, (3) automatic selection of test fluences, (4) automatic control of laser intensity drift, and (5) compatibility with a vacuum test environment.

Automated determination of damage frequencies and relative damage onsets will be described for single-layer-coated and uncoated metal and semiconductor mirrors. Tests were performed at 2.7 and 10.6 μm with 1/e2 focal spot diameters of 150 and 240 μm, respectively, using a nominal 100-ns pulse length in all cases. Results obtained with the scatter probe will be compared with those obtained from Nomarski postdamage analysis.

Author Information

Franck, JB
Seitel, SC
Hodgkin, VA
Faith, WN
Porteus, JO
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Details
Developed by Committee: E13
Pages: 71–76
DOI: 10.1520/STP23108S
ISBN-EB: 978-0-8031-4997-7
ISBN-13: 978-0-8031-0960-5