Lithium niobate - LiNbO3 is a useful material for optoelectronics. Many technologies are based on this material which has unique piezo-electric, optical and photoelastic properties while exhibiting mechanical and chemical stability.
The combination of excellent electro-optical, acousto-optical and non linear optical properties make an attractive host material for application in integrated optics.
Mg doped lithium niobate ( 1-6molMg doped lithium niobate crystal has excellent electro-optic and nonlinear optical properties, chemical and mechanical performance is good, can through the wide range, but also has high laser damage resistance and easy to grow large size crystals, there is a unique advantage in integrated optics, optical waveguide applications.
|Size tolerances||Z:+/-0.3mm; X,Y:+/-0.1mm|
|Rotating angles||<0.5mm, 45° +/-5°|
|Package||100 grade clean bag, 1000 grade exactly clean bag|
|Total||9 lithium niobate (LiNbO3) crystal wafer|
|Growth method||Czochralski method|
|Lattice constant, A||a=b=5.1548; c = 13.863|
|Melting point ,°C||1250|
|Curie point, °C||610|
|Refractive indices@633nm||no = 2.286, ne = 2.203|
|Nonlinear coefficients, (pmv-1)||d33=34.45，d31=d15=5.95，d22=13.07|
|Denko coefficient (pmv-1)||γ13=8.6，γ22=3.4，γ33=30.8，γ51=28.0，γ22=6.00|
|Total||12 lithium niobate (LiNbO3) crystal wafer|
The Cs+ doped congruent LiNbO3 crystal is a typical holographic storage medium, in a coherent beam visible under the laser radiation, Cs:LiNbO3 could produce self-reinforced diffraction of light. The Zn2+/Sc3+ co-doped congruent LiNbO3 crystal can obviously change the optical damage resistance.
The Zr4+ doped congruent LiNbO3 crystal could increased the laser damage threshold as much as 106 times over that of undoped LiNbO3,and also more excellent resistance to photorefractive than that of Mg-doped.
The Yb3+ doped congruent LiNbO3 crystal has the potential application value in the new spectra self-frequency-doubled laser.
Based on the band transport model, the two-center nonvolatile holographic recording in (Ce,Cu)∶LiNbO3 has been theoretically investigated and optimized. Microphysical parameters of (Ce,Cu)∶LiNbO3 crystal are obtained and used to rigorously solve two-center band transport equations by numerical algorithm. The effects of recording and sensitizing intensities, dopant concentration of Ce and Cu, and microphysical parameters on recording performance of two-center holographic recording have been analyzed. And the characteristic of two-center recording in (Ce,Cu)∶LiNbO3 crystal has been found, that the deep center Cu plays a key role in the recording process and a strong space-charge field has been built in Cu traps, so a high diffraction efficiency and fixing efficiency can be achieved.