1. Pockels Cells
Based upon the electro-optic result, when the used electric area acts upon the Pockels cell crystal (electro-optic crystal), the Pockels cell crystal (electro-optic crystal) is like a wave plate whose phase delay is connected to the applied electric field.
The polarization state of the outgoing light from the Pockels cell crystal will change to ensure that the strength, as well as amplitude of the outward bound 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 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, additionally called barium metaborate crystal, chemical formula BaB2O4, is an electro-optic and nonlinear crystal with outstanding extensive residential or commercial properties.
Attributes: BBO crystal has an extremely vast light transmission array, really low absorption coefficient, and also weak piezoelectric ringing effect; compared to various other electro-optical inflection crystals, it has a higher termination proportion, a larger stage matching angle, and High resistance to light damage limit, broadband temperature matching as well as exceptional optical uniformity are beneficial to enhance the stability of laser output power, particularly in the frequency triple of Nd: YAG laser has a large range of applications.
Application: It has a variety of associated fields in the third, fourth and 5th harmonics of Nd: YAG lasers (355nm, 266nm and 213nm, specifically), the second and 3rd harmonics of Ti: Sapphire amplifiers (400nm as well as 266.7 nm) and various other relevant areas. Application. It can likewise be related to OPO setups, optical parametric oscillators, and electro-optical applications from near-infrared to deep ultraviolet.
(2) DKDP crystal
Description: DKDP (KD * P) crystal, also referred to as potassium dideuterium phosphate crystal, chemical formula KD2PO4, is a detailed electro-optical crystal product.
Features: KDP as well as DKDP (KD * P) crystals have the advantages of high resistance to light damage limit, high electro-optic coefficient, excellent environmental tolerance, small style, as well as benefit as well as modification.
Application: It is widely used in high-tech areas such as laser frequency conversion, electro-optic inflection as well as electro-optic quick switching, can be made use of to make low-priced and massive completed nonlinear parts suitable for dual regularity (SHG) and triple frequency (THG) fields.
(3) KTP crystal
Description: KTP crystal, likewise called potassium titanium phosphate crystal, whose chemical formula is KTiOPO4, is a crystal product with outstanding nonlinear and electro-optical properties.
Characteristics: KTP has the residential or commercial properties of high electro-optical coefficient and low dielectric continuous, which can operate at high frequency and be utilized as an electro-optical Q-switched crystal. KTP likewise has excellent frequency doubling efficiency:
- – Big nonlinear coefficient
- – No declination Angle
- – High optical damage threshold
- – Little change in stage matching problems with temperature level
Application: utilized in tool and little power Nd: YAG as well as Nd: YVO4 laser output 1064-532nm laser frequency doubling crystal products.
(4) LN (LiNbO3) crystals
Summary: LiNbO3 crystal, additionally called lithium niobate crystal, described as LN crystal, is an electro-optical crystal with excellent comprehensive efficiency.
Features: Compared to various other electro-optical crystals, the crystal has the advantages of tiny dimension, difficult decidualization, huge electro-optical coefficient, broad openness array, high electro-optical effectiveness, low absorption loss as well as reduced damages limit.
Application: It has a large range of applications in related areas, such as electro-optic modulators as well as Q-switches in Nd: YAG, Nd: YLF as well as Ti: Sapphire lasers and also modulators in fiber optics. At the same time, it can be used in 532nm, 1064nm and 2940nm lasers, with regularity doubling over 1000 nm wavelength and optical criterion amplification of 1064nm pump light.