Based upon the electro-optic impact, when the used electric area acts on the Pockels cell crystal (electro-optic crystal), the Pockels cell crystal (electro-optic crystal) resembles a wave plate whose phase hold-up is associated with the used electric area. The polarization state of the outbound light from the Pockels cell crystal will change to make sure that the intensity and also amplitude of the outward bound light from the analyzer are regulated, which is electro-optic inflexion, and the modulation gadget is called a Pockels cell.
Pockels cell crystal
The crystals that create the electro-optical effect are called Pockels cell crystals, that is, electro-optical crystals. They each have their benefits. Currently, the primary Pockels cell crystals on the market consist of BBO crystals, DKDP crystals, KTP crystals, and also LN (LiNbO3) crystals.
(1) BBO crystal
Summary: BBO crystal, also called barium metaborate crystal, with chemical formula BaB2O4, is an electro-optic and nonlinear crystal with exceptionally detailed buildings.
Features: BBO crystal has an extremely broad light transmission variety, a really reduced absorption coefficient, and also weak piezoelectric ringing result; compared with other electro-optical inflexion crystals, it has a greater termination proportion, a larger phase matching angle, as well as High resistance to light damages limit, broadband temperature level matching and excellent optical harmony are beneficial to boost the stability of laser output power, specifically in the regularity triple of Nd: YAG laser has a wide variety of applications.
Application: It has a vast array of associated areas in the third, 4th and also 5th harmonics of Nd: YAG lasers (355nm, 266nm and also 213nm, respectively), the 2nd and also 3rd harmonics of Ti: Sapphire amplifiers (400nm and 266.7 nm) and various other associated areas. Application. It can additionally be put on OPO configurations, optical parametric oscillators, and electro-optical applications from near-infrared to deep ultraviolet.
(2) DKDP crystal
Summary: DKDP (KD * P) crystal, additionally called potassium deuterium phosphate crystal, chemical formula KD2PO4, is an extensive electro-optical crystal item.
Attributes: KDP and also DKDP (KD * P) crystals have the advantages of high resistance to light damage limit, high electro-optic coefficient, good environmental tolerance, portable style, as well as a benefit as well as adjustment.
Application: It is commonly utilized in high-tech areas such as laser regularity conversion, electro-optic modulation and electro-optic quick changing, and can be utilized to produce inexpensive and also large ended up nonlinear elements ideal for double frequency (SHG) as well as triple frequency (THG) fields.
(3) KTP crystal
Description: KTP crystal, likewise known as potassium titanium phosphate crystal, whose chemical formula is KTiOPO4, is a crystal product with superb nonlinear as well as electro-optical buildings.
Attributes: KTP has the properties of a high electro-optical coefficient as well as low dielectric continuous, which can work at high frequency as well as be used as an electro-optical Q-switched crystal. KTP likewise has superb frequency-doubling performance:
- Huge nonlinear coefficient
- No declination Angle
- High optical damages threshold
- Little change in phase-matching problems with temperature
Application: utilized in tool and also tiny power Nd: YAG as well as Nd: YVO4 laser output 1064-532nm laser regularity increasing crystal materials.
(4) LN (LiNbO3) crystals
Description: LiNbO3 crystal, also called lithium niobate crystal, described as LN crystal, is an electro-optical crystal with superb thorough performance.
Attributes: Compared with various other electro-optical crystals, the crystal has the advantages of little dimension, hard decidualization, big electro-optical coefficient, wide transparency range, high electro-optical performance, reduced absorption loss and also low damage threshold.
Application: It has a variety of applications in relevant areas, such as electro-optic modulators as well as Q-switches in Nd: YAG, Nd: YLF as well as Ti: Sapphire lasers as well as modulators in fibre optics. At the same time, it can be used in 532nm, 1064nm and also 2940nm lasers, with regularity doubling over 1000 nm wavelength and also optical parameter boosting of 1064nm pump light.