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Proceedings Paper

Ultrafast laser bonding of glasses and crystals to metals for epoxy-free optical instruments
Author(s): Robert E. Lafon; Steven Li; Frankie Micalizzi; Stephen Lebair
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Paper Abstract

The use of epoxies in space-based instruments is often unavoidable in situations where the bonding of dissimilar materials such as glass and metal is required. While there are epoxies that exhibit low total mass loss (TML) and collected volatile condensable materials (CVCM) in vacuum, in some applications they can still be a source of problematic contamination. Epoxies can also be incompatible with exposure to chemical environments some space instrumentation may be exposed to. In high power laser instruments such as LIDAR systems where optical components must be securely bonded to metal mounts, the impact of epoxy outgassing can be especially acute. Even with very low outgassing levels, the intense laser can break down the outgassed material and preferentially deposit it on optics that handle high optical power. This laser induced contamination in turn leads to laser induced damage, leading to degradation of optical components and reducing the reliability and operational lifetime of laser instruments [1-6]. Alternative bonding methods that avoid introducing additional contaminants could greatly improve reliability and operational lifetime of space instruments.

Paper Details

Date Published: 21 February 2020
PDF: 15 pages
Proc. SPIE 11261, Components and Packaging for Laser Systems VI, 1126103 (21 February 2020); doi: 10.1117/12.2551503
Show Author Affiliations
Robert E. Lafon, NASA Goddard Space Flight Ctr. (United States)
Steven Li, NASA Goddard Space Flight Ctr. (United States)
Frankie Micalizzi, NASA Goddard Space Flight Ctr. (United States)
Stephen Lebair, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 11261:
Components and Packaging for Laser Systems VI
Alexei L. Glebov; Paul O. Leisher, Editor(s)

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