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Laser Components Pockel Cell RTP Pockel Cell
RTP (rubidium titanyl phosphate - RbTiOPO4), is a very desirable crystal material for electro-optic modulators and Q-switches. It combinesseveral features of KD*P and Lithium Niobate andhas one major advantage over both: RTP exhibits virtually no piezo-electric effect with electrical signals between DC and 100 kHz. There is no ringing superimposed on the transmitted optical beam passing through the crystal. Modulators and Q-switches made with RTP can be utilized with high power lasers operating at high repetition rates.
Freedom from piezoelectric ringing enables the use of RTP devices in high repetition rate mode locked laser pulse extraction, laser pulse slicing, chopping and gating systems as well as in Q-switching applications. Tests conducted at up to 100 kHz reveal no ringing in the optical waveform.
RTP has a useful optical wavelength range from 350 nm to 4300 nm. Transmittance, in the 400 to 1100 nm range, with hard, “V” type high efficiency Anti-Reflection coatings is 98.5%. Standard AR wavelengths, at the present time, are 1064 nm and 700-900 nm. A-R coatings for other wavelengths are available.


No Piezoelectric Ringing

High Damage Threshold

High Extinction Ratio

Low Insertion Loss


Thermally Compensated

RTP Pockels Cell Specifications:

Aperture Diameter 3.5 mm
Repetition Ratio <10MHz
Quarter-Wave Voltage 1.6Kv
Intrinsic Contrast
@ 1064 nm
> 100 : 1
Optical Transmission > 98 % T
Damage Threshold*
(Nanosecond Pulses)
> 800 MW / cm2
Damage Threshold*
(cw Power)
> 5 kW / cm2
Wavefront Distortion
@ 1064 nm
< l/6
Electrical Contacts two, electrically floating, miniature banana plugs
Typical Capacitance 5 pF
Rise Time, picoseconds <350
Outline Dimensions 1" Diameter x 2" Long Cylinder

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