铌酸锂晶体(LiNbO3)

铌酸锂晶体(LiNbO3)

LiNbO3 is widely used as electro-optic modulators and Q-switches for Nd:YAG, Nd:YLF and Ti:Sapphire lasers as well as modulators forfiber optics. The following table list the specifications of a typical LiNbO3crystal used as Q-switch with transverse E-O modulation. The light propagatesin z-axis and electric field applies to x-axis. The electro-optic coefficientsof LiNbO3 are: r33 = 32 pm/V, r31 = 10 pm/V, r22 = 6.8 pm/V at low frequencyand 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

 

 

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