28-nm laser damage testing of LIF Page: 4 of 10
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
248-nm LASER DAMAGE TESTING OF LIF
Ultraviolet window materials such as lithium fluoride are suscep-
tible to three types of laier-induced damage: surface damage, bulk dam-
age, and color-center formation. In recent tests of seven samples - both
single crystal and press forged - we have observed bulk damage as the
primary failure mechanism.
Test conditions are listed in Table I.
In all tests - except one series that is described later - the ir.-
cideut beam was locused on the front surface of the sample. Since the
majority of damage sites were located in the bulk material at. a depth of
up to 2 ram, it is of interest to plot the laser fluence as a function of
depth in the crystal. Figure 1 is such a plot, which is obtained by ex-
trapolating measurements made in air, and ignoiing the possibility of
Bulk damage as observed in these tests was distinctly nonsubtle. A
bright spark was followed immediately by the creation of a large (~0.25 -
1.0 mm) fracture site that was star-like in appearanc*. Frequently a bulk
spark was observed, which persisted for tens of shots before extinction,
leaving no permanent visible record. These sites were listed in the "no
mean 1/e spot diameter
pulse rep. frequency
Here’s what’s next.
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Foltyn, S.R. & Newman, B.E. 28-nm laser damage testing of LIF, article, January 1, 1981; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1096671/m1/4/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.