Abstract
We have found that Tb-doped near-stoichiometric LiNbO3 crystals have three different types of energy levels: ultraviolet (UV) absorption centers just above the valence band, shallow electron traps slightly below the conduction band, and deep traps located about 1.9eV (λ ≈ 650 nm) below it. Using this shallow trap as an intermediate energy state, two-color holographic recording has been carried out at λ = 852 nm with a UV gating light at 313 nm. A few % of diffraction efficiency was achieved, and the measured two-color sensitivity was 0.01-0.02 cm/J. No reduction of diffraction efficiency was observed during 4 h continuous readout, and the bitor-rate of constructed digital hologram was less than 10-5.
Original language | English |
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Pages (from-to) | 1653-1655 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 76 |
Issue number | 13 |
DOIs | |
Publication status | Published - 2000 Mar 27 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)