Based upon the electro-optic impact, when the used electric area acts upon the Pockels cell crystal (electro-optic crystal), the Pockels cell crystal (electro-optic crystal) resembles a wave plate whose phase delay is connected to the applied electrical area.
The polarization state of the outgoing light from the Pockels cell crystal will certainly transform to ensure that the strength and also amplitude of the outward bound light from the analyzer are modulated, which is electro-optic modulation, and also the inflection device is called a Pockels cell.
Pockels cell crystal
The crystals that create the electro-optical impact are called Pockels cell crystals, that is, electro-optical crystals. They each have their benefits. Presently, the main Pockels cell crystals on the marketplace consist of BBO crystals, DKDP crystals, KTP crystals, as well as LN (LiNbO3) crystals.
(1) BBO crystal
Summary: BBO crystal, likewise known as barium metaborate crystal, with chemical formula BaB2O4, is an electro-optic and nonlinear crystal with superb detailed residential properties.
Functions: BBO crystal has an extremely vast light transmission array, very reduced absorption coefficient, and weak piezoelectric ringing result; compared with various other electro-optical modulation crystals, it has a greater termination ratio, a larger stage matching angle, and High resistance to light damage limit, broadband temperature matching as well as outstanding optical harmony are beneficial to boost the security of laser output power, especially in the frequency triple of Nd: YAG laser has a vast array of applications.
Application: It has a large range of associated fields in the 3rd, fourth, and also 5th harmonics of Nd: YAG lasers (355nm, 266nm, and 213nm, respectively), the 2nd and also third harmonics of Ti: Sapphire amplifiers (400nm as well as 266.7 nm) as well as other related areas. Application. It can also be put on OPO setups, optical parametric oscillators, and electro-optical applications from near-infrared to deep ultraviolet.
(2) DKDP crystal
Description: DKDP (KD * P) crystal, likewise referred to as potassium di-deuterium phosphate crystal, chemical formula KD2PO4, is an extensive electro-optical crystal product.
Features: KDP and also DKDP (KD * P) crystals have the advantages of high resistance to light damage limit, high electro-optic coefficient, great environmental tolerance, compact design, and benefit and also change.
Application: It is commonly utilized in high-tech areas such as laser frequency conversion, electro-optic inflection, and also electro-optic rapid switching, and can be used to manufacture inexpensive and also large-scale finished nonlinear parts ideal for double regularity (SHG) and three-way frequency (THG) fields.
(3) KTP crystal
Description: KTP crystal, also called potassium titanium phosphate crystal, whose chemical formula is KTiOPO4, is a crystal item with exceptional nonlinear and also electro-optical buildings.
Features: KTP has buildings of high electro-optical coefficient and also low dielectric continuous, which can work at high frequency and be used as an electro-optical Q-switched crystal. KTP also has superb frequency-increasing efficiency:
- Large nonlinear coefficient
- No declination Angle
- High optical damage limit
- Little change in phase matching problems with temperature level
Application: utilized in the medium as well as tiny power Nd: YAG and Nd: YVO4 laser result 1064-532nm laser frequency increasing crystal products.
(4) LN (LiNbO3) crystals
Summary: LiNbO3 crystal, also referred to as lithium niobate crystal, referred to as LN crystal, is an electro-optical crystal with superb comprehensive performance.
Characteristics: Compared to various other electro-optical crystals, the crystal has the advantages of little size, hard decidualization, large electro-optical coefficient, broad openness range, high electro-optical performance, reduced absorption loss, and also reduced damage limit.
Application: It has a variety of applications in related areas, such as electro-optic modulators and also Q-switches in Nd: YAG, Nd: YLF, and Ti: Sapphire lasers as well as modulators in fiber optics. At the same time, it can be used in 532nm, 1064nm, and 2940nm lasers, with frequency doubling above 1000 nm wavelength as well as optical parameter amplification of 1064nm pump light.