A narrow-band interference filter with photorefractive LiNbO3
- 14 February 1994
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 27 (2) , 241-246
- https://doi.org/10.1088/0022-3727/27/2/010
Abstract
A narrow-bandwidth interference filter has been developed using volume holography in photorefractive LiNbO3 crystals. The device works as a Bragg reflector using a volume hologram recorded, fixed and developed in a LiNbO3 sample. With a 2 mm thick LiNbO3 plate the following performances have been achieved: a peak reflectivity above 32%, a full-width at half-maximum bandwidth below 0.05 nm, an angular field of view of about 3 degrees and a peak wavelength of 518.45 nm (for green Ar laser writing wavelength). These performances compare well with that exhibited by the conventional Lyot-Ohman and Solc filters. A complete explanation of the fabrication procedure is given, including practical details needed for producing such an efficiency with fixed holograms in LiNbO3.Keywords
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