Pockels cell Q switch

A new kind of EO Q-switch is designed by use of a La₃Ga₅SiQ₁₄ (LGS) crystal. LGS crystal is one kind of optically active NLO material with very high damage threshold (about 9 times as that of LN), excellent E-O coefficient, high temperature stability (better than quartz), the Q-switch is based on the consideration that the total rotation angle of the polarization plane is zero, whereas the polarized wave propagates through the Pockels cell back and forth, with the polarization plane gyration and electro-optic effect existing simultaneously, therefore it is widely used in E-O components such as E-O modulator, Q-switch, etc.

For wavelengths up to 3.2μm;

Transmitted wave front distortion: < l/4;

Damage threshold: > 900MW/cm² (@1064nm, 10ns, typical, not guaranteed);

LGS available for medium power systems, partially take place of DKDP and LiNbO₃ series Q-switches

The LGS (LG-EO-Q) series Q-switch (Pockels Cell) is a practical electro-optic device that can be used in medium output energy lasers to partially take the place of DKDP and LiNbO₃ series Q-switches

BBO is one of the electro-optic material choices for high average power E-O Q switch applications. BBO has significant advantages over other materials in terms of laser power handling abilities, temperature stability, and substantial freedom from piezoelectric ringing. Because it relies on the electro optic effect, switching time – aided by the low capacitance of the E-O Q switch is very fast

High peak power damage resistance

Low absorption

UV transmission

Low acoustic noise

The wide transparency range of BBO allows it to be used in diverse applications

Beta Barium Borate (BBO) crystal is a Nonlinear Optical Crystal with a combination of unique features: wide transparency region, broad phase-matching range, large nonlinear coefficient, high damage threshold, wide thermal acceptance bandwidth and high optical homogeneity

High repetition rate DPSS Q-switch

High repetition rate regenerative amplifier control

Cavity dumping

Beam chopper

The DKDP crystal is a uniaxial crystal with excellent optical quality with an extinction ratio of > 2000:1 (measured using a 632nm He-Ne laser) with a wave front distortion of 98%. The DKDP electro-optic Q-switching capacitor is small (about 3-5pF), so the rise time is short (< 0.5ns), and a narrow pulse width pulse laser can be output during Q-switching. Compared with the widely used electro-optic crystals on the market, DKDP crystals have higher damage thresholds; the damage threshold is > 1GW/cm² under optical conditions of 10ns pulse width, 1064nm wavelength and repetition frequency 10Hz

No photorefractive damage; Resistant to environmental temperature

Sealant and adhesive free; High extinction ratio

High damage threshold; Low λ/4 Voltage; Single pass optical transmission

Applications: Laser systems with large caliber, high power and narrow pulse width. They are among the optimal E-O Q-switches used in pulse laser systems, including: OEM laser systems; Medical/cosmetic lasers; Versatile R&D laser platforms; Military & aerospace laser systems