1. Pockels Cell
Pockels Cell: Based upon the electro-optic result, when the applied electrical area acts on the Pockels cell crystal (electro-optic crystal), the Pockels cell crystal (electro-optic crystal) is like a wave plate whose stage delay is related to the used electrical area. The polarization state of the outgoing light from the Pockels cell crystal will transform to ensure that the intensity and amplitude of the outbound light from the analyzer are modulated, which is electro-optic modulation, and the modulation device is called a Pockels cell.
2. Pockels cell crystal
The crystals that create the electro-optical result are called Pockels cell crystals, that is, electro-optical crystals. They each have their advantages. Presently, the main Pockel cell crystals on the market include BBO crystals, DKDP crystals, KTP crystals, and LN (LiNbO3) crystals.
(1) BBO crystal
Description: BBO crystal, called barium metaborate crystal, with chemical formula BaB2O4, is an electro-optic and nonlinear crystal with outstanding comprehensive residential or commercial properties.
Functions: BBO crystal has an extremely wide light transmission range, a low absorption coefficient, as well a weak piezoelectric buzzing effect; compared to other electro-optical inflexion crystals, it has a higher extinction ratio, a bigger phase matching angle and High resistance to light damage limit, broadband temperature matching and outstanding optical harmony are beneficial to enhance the security of laser output power, especially in the frequency triple of Nd: YAG laser has a variety of applications.
Application: It has a variety of associated fields in the third, fourth and 5th harmonics of Nd: YAG lasers (355nm, 266nm and also 213nm, respectively), the 2nd and third harmonics of Ti: Sapphire amplifiers (400nm as well as 266.7 nm) and other associated fields. Application. It can also be related to OPO configurations, optical parametric oscillators, and electro-optical applications from near-infrared to deep ultraviolet.
(2) DKDP crystal
Description: DKDP (KD * P) crystal, referred to as potassium deuterium phosphate crystal, chemical formula KD2PO4, is a comprehensive electro-optical crystal product.
Features: KDP and also DKDP (KD * P) crystals have the advantages of high resistance to light damage threshold, high electro-optic coefficient, great ecological resistance, portable style, as well as benefit and also change.
Application: It is widely used in high-tech fields such as laser frequency conversion, electro-optic inflexion and also electro-optic quick changing, and can be made use of to make low-priced as well as large completed nonlinear elements appropriate for double frequency (SHG) as well as triple regularity (THG) areas.
(3) KTP crystal
Summary: KTP crystal, additionally referred to as potassium titanium phosphate crystal, whose chemical formula is KTiOPO4, is a crystal item with excellent nonlinear and electro-optical residential or commercial properties.
Features: KTP has the properties of a high electro-optical coefficient and low dielectric continuous, which can operate at high frequency and be used as an electro-optical Q-switched crystal. KTP likewise has excellent regularity increasing efficiency:
- Large nonlinear coefficient
- No declination Angle
- High optical damage threshold
- Little change in stage matching problems with temperature
Application: used in tool and tiny power Nd: YAG and Nd: YVO4 laser outcome 1064-532nm laser regularity doubling crystal products.
(4) LN (LiNbO3) crystals
Summary: LiNbO3 crystal, additionally referred to as lithium niobate crystal, referred to as LN crystal, is an electro-optical crystal with outstanding comprehensive performance.
Qualities: Compared to other electro-optical crystals, the crystal has the advantages of small dimension, challenging decidualization, huge electro-optical coefficient, large openness array, high electro-optical efficiency, low absorption loss as well as reduced damage threshold.
Application: It has a wide range of applications in related areas, such as electro-optic modulators and also Q-switches in Nd: YAG, Nd: YLF, as well as Ti: Sapphire lasers and also modulators in fibre optics. At the same time, it can be utilized in 532nm, 1064nm and 2940nm lasers, with regularity increasing over 1000 nm wavelength and optical parameter boosting of 1064nm pump light.
