Русский
Deutsch
Español
Français
KTP Pockels Cell
• Non-hygroscopic
• Excellent optical uniformity
• Wide optical bandwidth of 500-2800nm
• Low absorption losses at 1064nm wavelength (<250ppm/cm at 1064nm)
• High extinction ratio (>25 dB @ 633nm)
• Low half-wave voltage for electro-optics applications
• Minimum piezoelectric ringing compatible for 1MHz
• Rise time under 1ns to precise switching in high repetition rate laser
• High laser induced damage threshold (> 600MW/cm2 at 10Hz,10 ns at 1064nm)
• High resistivity and thermally compensated design to operate on large temperature range (-50℃ to +70℃)
KTP Pockels are based on hydrothermal-grown high resistivity KTP crystals overcomes the common electrochromism damage of flux-grown KTP. Hydrothermal-grown KTP crystals have better optical homogeneity and higher damage threshold comparing to RTP crystals. This KTP crystal has large effective electro-optic coefficients and lower half-wave voltage. The Q-switch is built utilizing thermally compensated double crystal designs. The outstanding feature is a possibility to operate KTP Pockels cells at high duty cycles or even to keep at high voltage for the longer time.
Applications:
Q-switching of high repetition rate lasers at 1 kHz – 1 MHz
Pulse picking
Electro-optical modulator
Features:
λ/2 operation with much lower high voltage comparing to DKDP or BBO Pockels cells
Typical half-wave operation voltage is <1.5 kV for 3.5 mm diameter clear aperture cell
Stable non-drifting contrast operation at high duty cycles
Very low piezo-electric resonances
Standard available apertures: 3×3, 4×4, 5×5, 6×6, 8×8, and 10×10 mm
Supplied as hermetically sealed cells with windows for operation in ordinary (not clean) environment or in open X-shape holder for operation in clean environment
Sizes of one of the pair of KTP (mm) | X-cut | Y-cut | Electrical Resistivity (Ohm·cm) | ||
HWV @1064nm (V) | Extinction Ratio @ 633nm (dB) | HWV @1064nm (V) | Extinction Ratio @ 633nm (dB) | ||
3×3×10 | 1200 | > 25 | 1000 | > 20 | > 1011 |
4×4×10 | 1600 | > 25 | 1300 | > 20 | > 1011 |
5×5×10 | 2000 | > 25 | 1600 | > 20 | > 1011 |
6×6×10 | 2300 | > 25 | 1900 | > 20 | > 1011 |
7×7×10 | 2700 | > 25 | 2200 | > 20 | > 1011 |
8×8×10 | 3100 | > 25 | 2500 | > 20 | > 1011 |
9×9×10 | 3500 | > 25 | 2800 | > 20 | > 1011 |
Damage Threshold: > 600 MW/cm2 for 10 ns pulses @ 1064 nm (AR coating) | |||||
