Improved UV photorefractive LiNbO3 crystals and their applications in Ca K-line narrow-bandwidth imaging filters

Feng Zhao; Koichi Sayano; Harold E. Miller Jr.; Jason Corwin; Nicolette Werner

doi:10.1117/12.287784

22 September 1997 Improved UV photorefractive LiNbO₃ crystals and their applications in Ca K-line narrow-bandwidth imaging filters

Feng Zhao, Koichi Sayano, Harold E. Miller Jr., Jason Corwin, Nicolette Werner

Author Affiliations +

Proceedings Volume 3137, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications III; (1997) https://doi.org/10.1117/12.287784
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

We present experimental results of holographic grating recording in the near ultra-violet (UV) in photorefractive LiNbO₃ crystals. The UV wavelength limits of Fe-doped LiNbO₃ crystals for UV grating filters have been established by characterizing the grating diffraction efficiency versus recording wavelength ranging from 300 to 400 nm. Methods for improving the UV performance of LiNbO₃ have also been investigated. It has been shown that the material absorption loss of Fe:LiNbO₃ crystals can be reduced and the grating efficiency can be a significantly improved by using proper post-grown oxidization treatment. Using the improved UV LiNbO₃ crystal, a sub-Angstrom bandwidth holographic grating imaging filter for solar observation at the Ca K-line (393.3 nm) has also been fabricated. Narrow bandwidth (22 pm, FWHM), large numerical aperture (f/15), large field-of-view (35 mrad), large aperture (15 mm in diameter) and high in-band diffraction efficiency (25%) have been successfully demonstrated. These results indicate an improved performance at a reduced cost as compared with currently available Lyot filters for solar magnetic field sensing at Ca K-line. Applications of the UV photorefractive holographic grating devices include solar and planetary observing, lidar receiving sub-systems for Earth remote sensing and atmospheric monitoring, and high density UV optical data storage.

Citation Download Citation

Feng Zhao, Koichi Sayano, Harold E. Miller Jr., Jason Corwin, and Nicolette Werner "Improved UV photorefractive LiNbO₃ crystals and their applications in Ca K-line narrow-bandwidth imaging filters", Proc. SPIE 3137, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications III, (22 September 1997); https://doi.org/10.1117/12.287784

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Diffraction gratings

Crystals

Ultraviolet radiation

Optical filters

Absorption

Diffraction

Holography

Show All Keywords

Keywords/Phrases

Search In:

Publication Years