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A narrow-band interference filter with photorefractive LiNbO 3

1994; Institute of Physics; Volume: 27; Issue: 2 Linguagem: Inglês

10.1088/0022-3727/27/2/010

1361-6463

R. Müller, M.T. Santos, L. Arizméndi, J. M. Cabrera,

Photonic and Optical Devices

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.