LiNbO3 and MgO:LiNbO3 Pockels Cells
● Preferably for Er:YAG-, Ho:YAG-, Tm:YAG laser
● Wavelengths up to 3μm
● Brewster for laser with low amplification
LiNbO3 crystals and MgO:LiNbO3 crystals have become the most commonly used material for Q-switches and phase modulators for its high EO coefficients. With an electric field applied transverse to the direction of light propagation, LiNBO3 cells can be configured to operate at a lower voltage than comparable KD*P cells. LiNbO3 can also be a good choice for infrared wavelengths as long as 3.0 µm. Hangzhou Shalom EO offers the pockels cells made from LiNbO3 crystals and MgO:LiNbO3 crystals, with aperture size of 2.5mm to 9mm.
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Aperture
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2.5mm
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5mm
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8mm
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9mm
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Shell size
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φ20 x 66mm
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φ25.4 x 36mm
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φ30/32 x 26/30mm
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φ31/32 x 26mm
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λ/4 voltage
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400V λ/2 @
633nm
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800V λ/2 @
633nm
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1800V-1900V λ/4 @
1064nm
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2100V λ/4 @
1064nm
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Overall transmittance
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>98%
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>98%
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>98%
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>98%
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Insertion loss
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3%
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3%
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3%
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3%
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Output tuning Q energy
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100mJ
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100mJ
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100mJ
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100mJ
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Crystal through distortion
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λ/4 @ 633nm
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λ/4 @ 633nm
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λ/4 @ 633nm
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λ/4 @ 633nm
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Flatness
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λ/8 @ 633nm
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λ/8 @ 633nm
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λ/8 @ 633nm
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λ/8 @ 633nm
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Extinction ratio
|
200:1 at 5mm
section
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200:1 at 5mm
Section
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200:1 at 5mm
Section
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200:1 at 5mm
Section
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Capacitance
|
5pF
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5pF
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5pF
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5pF
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Damage threshold
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100MW/cm2 1064nm 10ns 10Hz (LN switch)
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300MW/cm2 1064nm 10ns 10Hz (MgO: LN switch)
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Specifications of LiNbO3 crystals
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Aperture
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Min. 5x5mm
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Max. 20x20mm
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Length
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~60mm
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Orientation
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12 arc min
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Flatness
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λ/8 @ 633nm
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Wave front distortion
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λ/4 @ 633nm
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Parallelism
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< 20 arc sec
|
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Perpendicularity
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< 5 arc sec
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Surface quality
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10-5 after coating 20-10
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Wavelength
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300-3000nm
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