Lithium Niobate(LiNbO3) Crystal Series
LiNbO3 is widely used as electro-optic modulator and Q-switch for Nd:YAG, Nd:YLF and Ti:Sapphire lasers as well as modulator for fiber optics, etc. The transverse modulation is mostly employed for LiNbO3 crystal.
If a LiNbO
3 with specifications listed in the following Table is used as Q-switch crystal, i.e., the light propagates in z-axis and electric field applies to x-axis, the refractive retardation will be G = pLnr22V/ld. The electro-optic coefficients of LiNbO3 are: r33 = 32 pm/V, r31 = 10 pm/V, r22 = 6.8 pm/V at low frequency and r33 = 31 pm/V, r31 = 8.6 pm/V, r22 = 3.4 pm/V at high electric frequency. LiNbO3 Q-Switch Elements¡¡
Size |
9´9´25 mm3 or 4´4´15 mm3 |
Other size is available upon request |
|
Tolerance of size |
Z-axis: ¡À0.3 mm |
X-axis and Y-axis: ´0.1 mm |
|
Chamfer |
less than 0.5 mm at 45 ¡ã ´ 5¡ã |
Accuracy of orientation |
Z-axis: < ¡À5' X-axis and Y-axis: < ¡À10' |
Parallelism |
< 10" |
Finish |
10/5 scratch/dig |
Flatness |
l/8 at 632.8 nm |
AR-coating |
reflectance < 0.2% @ 1064 nm |
Electrodes |
Gold or Cr electrode on X-faces |
Wavefront distortion |
< l/4 @ 633 nm |
Extinction ratio |
> 400:1 @ 633 nm, f6 mm beam |
Note:
The damage threshold of LiNbO3 is low. It is not suitable to high power application.MgO:LiNbO
3 and ZnO:LiNbO3 crystals have similar electro-optic properties to LiNbO3 but with higher damage threshold. CASIX provides these two crystals with the same specifications of LiNbO3 listed in the above Table. Please contact us for more information.We also provide polarizers and waveplates which are used to construct E-O Q-Switches and modulators (see CASIX's Optics Guide 99).
Copyright 1998 CASIX, Inc. All rights reserved.
Last Revised: May 19, 1999
Web Page maintained by : Contact@CASIX.com
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