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  • BBO Pockels Cells

  • Pockels cells alter the polarization state of incident light when applying the voltage on electro-optic crystal. When working with polarizers, these cells can function as optical switches or laser Q-switches. BBO Pockels cells is based on the transverse Pockels effect. The voltage could be reduced by changing the ratio of BBO's width to length.
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Pockels cells alter the polarization state of incident light when applying the voltage on electro-optic crystal. When working with polarizers, these cells can function as optical switches or laser Q-switches. BBO Pockels cells is based on the transverse Pockels effect. The voltage could be reduced by changing the ratio of BBO's width to length.

Due to the low piezoelectric response and high laser damage threshold of BBO, CASTECH's BBO Pockels cells can support up to 1MHz frequency. Complete portfolio with various clear aperture and length is available.

All the Pockels cells are equipped with protective windows with high transmittance AR coating to prevent the Pockels cells from contamination and moisture so as to provide adequate assurance of the product performance and durability.

Applications

● Q-switching ● Regenerative amplifier ● Pulse picker ● Cavity dumping

● Beam chopper ● High speed optical switch ● Optical power stabilizer

Product Number Aperture
(a)
Crystal Length
(l)
Crystal Quantity
(q)
Additional
(b)
Wavelength
(w)
BPC-alq-b-w 3(3mm)
4(4mm)
5(5mm)
6(6mm)
7(7mm)
...
A
(20mm)
B
(25mm)
...
S
(Single)
D
(Double)
T
(Triple)
C(Ceramic)
W(Wave plate)
B(Brewster window)
A(Brewster window & wave plate)
N(Nothing)
266nm
532nm
1030nm
1064nm
...
L
(Fiber-coupled)
FC/PC
Bare fiber
  Product Number* Voltage Contrast
Ratio
Clear Aperture Crystal
Quantity
Transmittance
@1064nm
With ceramic
diaphragm
BPC-alS-C-w ≥1200:1 3~7mm Single ≥99.3%
BPC-alD-C-w ≥1000:1 3~7mm Double ≥99%
BPC-alT-C-w ≥800:1 3~7mm Triple ≥97.5%
With polarizer or
wave plate
BPC-alS-b-w >800:1 3~7mm Single ≥98%
BPC-alD-b-w >500:1 3~7mm Double ≥97%
BPC-alT-b-w >500:1 3~7mm Triple ≥96%
  BPC-L >800:1 Fiber-coupled / /

*Damage threshold: 10 J/cm2 @ 1064 nm, 10 ns, 10Hz

*Customized products are available.

Dimensions(mm):

 

  3AS 3BS 4AS 4BS 5AS 5BS 6AS 6BS 3AD 3BD 4AD 4BD 5AD 5BD 6AD 6BD
A 2.6 2.6 3.6 3.6 4.6 4.6 5.6 5.6 2.6 2.6 3.6 3.6 4.6 4.6 5.6 5.6
B 35 40 35 40 35 40 35 40 57.7 67.7 57.7 67.7 57.7 67.7 57.7 67.7
C 17.5 20 17.5 20 17.5 20 17.5 20 17.4 23 17.4 23 17.4 23 17.4 23
λ/4 voltage

(@ 1064 nm), kV
3.5 2.8 4.9 3.9 5.9 4.7 7.3 5.8 1.8 1.47 2.5 2 3 2.4 3.7 2.9

 

 

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