LightGate Series
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LightGate Series BBO Pockels Cell LG 2.6 / LG 3 / LG 4 / LG 5 / LG7 LightGate BBO Pockels cells are the preferred alternative to KD*P Pockels cells for high-average power and high repetition rate applications. The LightGate series BBO Pockels cell employs dual crystal geometry to minimize drive voltage (~2.9kV quarter-wave voltage @ 1064nm for 4mm aperture LightGate 4). BBO Pockels cells operate from approximately 0.2 to 1.65 µm and are not subject to tracking degradation. Due to the low piezoelectric coupling coefficients of BBO, LightGate cells function at repetition rates of hundreds of kilohertz. LightGate Pockels cells work in regenerative amplifiers, high pulse repetition rate micro-machining lasers, and high-average power lasers for material processing and metal annealing. G&H also offers single crystal cells, extralong, reduced voltage cells, attenuated cells for applications requiring ultra-low piezoelectric response, and cells with watercooled apertures for high average power operation. Contact: Sales@goochandhousego.com Key Features: Solid State – no index matching fluid High pulse rate operation to 600kHz Low acoustic noise Damage resistant ceramic apertures Compact design High-reliability Reduced voltage version requires lower voltage than other BBO cells. Key Benefits: Ideal for high average power systems Field proven performance Excellent/accessible technical support Test documentation with each device One year limited warranty Applications: OEM and replacement Machining, marking, via hole drilling Ophthalmic equipment Q-switch & regenerative amplifiers Research Education Military As part of our policy of continuous product improvement we reserve the right to change specifications at any time LG150116

Performance Data - Standard Configuration Typical Specifications for standard cell DC Quarter wave voltage (±6%) @ 1064nm 10-90% Rise time (theoretical) into 50 Ω line Duty Cycle in 1 s (applied voltage time/ total time) Physical Hard aperture diameters Single Pass Insertion Loss @ 1064 nm Intrinsic Contrast Ratio (ICR) @ 1064 nm Voltage Contrast Ratio (VCR) @ 1064 nm (parallel polarizers) Single Pass Wavefront Distortion @ 1064 nm † LIDT , 10 Hz @1064 nm,10ns, ~1mm diameter Electrical † Recommended operation at 1/10 this fluence level for increased longevity. LIDT will vary with wavelength...

LightGate Series BBO Pockels Cell Optional Configurations G&H provides LightGate series Pockels cells in a range of configurations to address unique and challenging applications. Modifications include acoustic resonance attenuation, reduced voltage operation and watercooled apertures. Gooch & Housego can offer recommendations regarding the suitability of specific modifications required for your particular application. Attenuated Version Attenuation reduces the impact of the piezoelectric effect. Crystals demonstrating the piezoelectric effect will mechanically deform in the presence of an...

Reduced Voltage Version In situations that require a lower operating voltage than necessary for the standard LightGate cell, select the reduced voltage LightGate option. The quarter-wave voltage values at 1064nm in the table below compare the voltage requirements for both configurations. Model LG2.6 LG3 LG4 LG5 LG7 The external dimensions of the reduced voltage option are different than the standard LightGate external dimensions. Outline drawings of the reduced voltage (R) LightGate option can be seen in the following drawing. Water-Cooled Apertures Version Contact:...

Although all laser energy should always remain well within the clear aperture of the Pockels cell, and the Pockels cell must not function as a limiting aperture, in systems with high average power marking, drilling, and machining lasers, which frequently use BBO Pockels cells, sometimes there exists some small but significant percentage of energy outside the clear aperture of the Pockels cell. For these cases, the LightGate series water-cooled aperture modification may reduce the potential for runaway thermal damage and or resultant thermal depolarization. While not intended to eliminate...