NDLI: Optical cavity surface coatings for 1 micron laser missions

Content Provider	IEEE Xplore Digital Library
Author	Hedgeland, R.J. Straka, S. Matsumura, M. Hammerbacher, J.
Copyright Year	2004
Description	Author affiliation: NASA-Goddard Space Flight Center, Greenbelt, MD, USA (Hedgeland, R.J.; Straka, S.; Matsumura, M.)
Abstract	The particulate surface cleanliness level on several coatings for aluminum and beryllium substrates were examined for use in the optical cavities of high pulse energy Nd:YAG Q-switched, diode-pumped lasers for space flight applications. Because of the high intensity of the lasers, any contaminants in the laser beam path could damage optical components and limit the instrument mission objectives at the operating wavelength of 1 micron (/spl mu/m). Our goal was to achieve a Mil-Std 1246 level 100 particulate distribution or better to ensure that particulate redistribution during launch would not adversely affect the mission performance objectives. Tapelifts were performed to quantify the amount of particles using in-house developed procedures. The primary coatings included chromate conversion coated aluminum (Al), uncoated (bare) Al, electroless nickel (EN) on Al, gold (Au)/EN on Al, anodized Al, and Au/EN on Beryllium (Be). When considering applications that need to meet launch environments, the results indicate advantages in Au/EN coating applications for the two major substrates, Al and Be.
Sponsorship	Aerosp. and Electron. Syst. Soc
Starting Page	1762
Ending Page	1769
File Size	751056
Page Count	8
File Format	PDF
ISBN	0780381556
ISSN	1095323X
DOI	10.1109/AERO.2004.1367955
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-03-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Surface emitting lasers Coatings Gold Optical surface waves Surface contamination Aluminum Optical pulses Diodes Laser beams Optical devices
Content Type	Text
Resource Type	Article
Subject	Aerospace Engineering Space and Planetary Science

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