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LiNbO3 Crystal
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LiNbO3 Crystal
     LiNbO3 is widely used as electro-optic modulators and Qswitches for Nd:YAG, Nd:YLF and Ti:Sapphire lasers as well as modulators forfiber optics. The specifications in the following table list on typical LiNbO3
    crystal used as Qswitch with transverse EO modulation. The light propagates in zaxis and electric field applies to xaxis. The electrooptic coefficients of LiNbO3 are: r33 = 32 pm/V, r31 = 10 pm/V, r22 = 6.8 pm/V at lowfrequency and r33 = 31 pm/V, r31= 8.6 pm/V, r22 = 3.4 pm/V at high electric frequency. The half–wave voltage: Vπ=λd/(2no3r22L), r c=(ne/no)3r33-r13.

LiNbO3 Q-Switch Specifications

Size

9 X 9 X 25 mm3 or 4 X 4 X 15 mm3

Other size is available upon request

Tolerance of size

Z-axis: ± 0.2 mm

X-axis and Y-axis:±0.1 mm

Chamfer

less than 0.5 mm at 45°

Accuracy of orientation

Z-axis: <± 5’
X-axis and Y-axis: < ± 10’

Parallelism

< 20"

Finish

10/5 scratch/dig

Flatness

λ/8 at 633 nm

AR-coating

R < 0.2% @ 1064 nm

Electrodes

Gold/Chrome plated on X-faces

Wavefront distortion

<λ/4 @ 633 nm

Extinction ratio

> 400:1 @ 633 nm, φ6 mm beam

        LiNbO3 is also a good acoustooptic crystal and used for surface acoustic wave (SAW) wafer and A-O modulators. YS provide acoustic (SAW) grade LiNbO3 crystals in wafers, ascut boules, finished components and custom fabricated elements.


Typical SAW Properties

Cut Type

SAW Velocity
Vs (m/s)

Electromechanical Coupling Factor
k2s (%)

Temperature Coefficient of Velocity
TCV (10-6/oC)

Temperature Coefficient of Delay
TCD (10-6/oC)

127.86o Y-X

3970

5.5

-60

78

Y-X

3485

4.3

-85

95


Typical Specifications

Type Specifications

Boule

Wafer

Diameter

Φ3"

Φ4"

Φ3"

Φ4"

Length or Thickness(mm)

≤100

≤50

0.35-0.5

Orientation

127.86°Y, 64°Y, 135°Y, X, Y, Z, and other cut

Ref. Flat Orientation

X, Y

Ref. Flat Length

22±2mm

32±2mm

22±2mm

32±2mm

Front Side Polishing


Mirror polished 5-15 ?

Back Side Lapping


0.3-1.0 mm

Flatness (mm)


≤ 15

Bow (mm)


≤ 25


YS can offer other sizes and specifications of wafers upon request.

Contact US

#515,Tianhui Building, Yeqing 1st Road Longgang Zone, Shenzhen City
Guangdong,China,518000

TEL:+86-755-33295277

FAX:+86-755-33295277

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