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Title: Development of composite polymer-glass edge claddings for Nova laser disks

Abstract

Large Nd:glass laser disks for disk amplifiers require an edge cladding which absorbs at 1 ..mu..m. This cladding prevents edge reflections from causing parasitic oscillations that would otherwise deplete the gain. We have developed a composite polymer-glass edge cladding that consists of absorbing glass strips bonded to the edges of laser glass disks using an epoxy adhesive. The edge cladding must survive a fluence of approximately 20 J/cm/sup 2/ in a 0.5-ms pulse. Failure can occur either by decomposition of the polymer or by mechanical failure from thermal stresses which leads to bond delamination. An epoxy has been developed that gives the required damage resistance, refractive index match and processing characteristics. A slight tilt of the disk edges greatly reduces the threat from parasitic oscillations and a glass surface treatment is used to promote bond adhesion. Laser disks fabricated with this new cladding show identical gain performance to disks using conventional fused-glass cladding and have been tested for over 2000 shots (equivalent to about a 4-year lifetime on Nova) without degradation. 43 refs., 16 figs., 3 tabs.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
5894579
Report Number(s):
UCRL-95285; CONF-8710165-3
ON: DE88002389
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Boulder damage symposium, Boulder, CO, USA, 26 Oct 1987; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; GLASS; LASER MATERIALS; NEODYMIUM; POLYMERS; BONDING; SURFACE COATING; AMPLIFIERS; DAMAGE; DOPED MATERIALS; NOVA FACILITY; OSCILLATIONS; DEPOSITION; ELECTRONIC EQUIPMENT; ELEMENTS; EQUIPMENT; FABRICATION; JOINING; MATERIALS; METALS; RARE EARTHS; 420300* - Engineering- Lasers- (-1989)

Citation Formats

Campbell, J H, Edwards, G, Frick, F A, Gemmell, D S, Gim, B M, Jancaitis, K S, Jessop, E S, Kong, M K, Lyon, R E, and Murray, J E. Development of composite polymer-glass edge claddings for Nova laser disks. United States: N. p., 1987. Web.
Campbell, J H, Edwards, G, Frick, F A, Gemmell, D S, Gim, B M, Jancaitis, K S, Jessop, E S, Kong, M K, Lyon, R E, & Murray, J E. Development of composite polymer-glass edge claddings for Nova laser disks. United States.
Campbell, J H, Edwards, G, Frick, F A, Gemmell, D S, Gim, B M, Jancaitis, K S, Jessop, E S, Kong, M K, Lyon, R E, and Murray, J E. Fri . "Development of composite polymer-glass edge claddings for Nova laser disks". United States.
@article{osti_5894579,
title = {Development of composite polymer-glass edge claddings for Nova laser disks},
author = {Campbell, J H and Edwards, G and Frick, F A and Gemmell, D S and Gim, B M and Jancaitis, K S and Jessop, E S and Kong, M K and Lyon, R E and Murray, J E},
abstractNote = {Large Nd:glass laser disks for disk amplifiers require an edge cladding which absorbs at 1 ..mu..m. This cladding prevents edge reflections from causing parasitic oscillations that would otherwise deplete the gain. We have developed a composite polymer-glass edge cladding that consists of absorbing glass strips bonded to the edges of laser glass disks using an epoxy adhesive. The edge cladding must survive a fluence of approximately 20 J/cm/sup 2/ in a 0.5-ms pulse. Failure can occur either by decomposition of the polymer or by mechanical failure from thermal stresses which leads to bond delamination. An epoxy has been developed that gives the required damage resistance, refractive index match and processing characteristics. A slight tilt of the disk edges greatly reduces the threat from parasitic oscillations and a glass surface treatment is used to promote bond adhesion. Laser disks fabricated with this new cladding show identical gain performance to disks using conventional fused-glass cladding and have been tested for over 2000 shots (equivalent to about a 4-year lifetime on Nova) without degradation. 43 refs., 16 figs., 3 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/5894579}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {10}
}

Conference:
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