Pockels Cells
Pockels Cells
Based upon the electro-optic impact, when the applied 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 electrical field. The polarization state of the outward bound light from the Pockels cell crystal will certainly change to make sure that the strength and amplitude of the outbound light from the analyzer are regulated, which is electro-optic modulation, as well as the modulation gadget, is called Pockels cells.
Pockels cells crystal
The crystals that generate the electro-optical impact are called Pockels cell crystals, that is, electro-optical crystals. They each have their advantages. Presently, the main Pockels cell crystals on the market include BBO crystals, DKDP crystals, KTP crystals, and LN (LiNbO3) crystals.
(1) BBO crystal
Summary: BBO crystal, additionally called barium metaborate crystal, chemical formula BaB2O4, is an electro-optic as well as nonlinear crystal with exceptional detailed residential properties.
Attributes: BBO crystal has an extremely broad light transmission variety, really reduced absorption coefficient, and weak piezoelectric buzzing result; compared with various other electro-optical modulation crystals, it has a higher extinction proportion, a larger phase matching angle, and High resistance to light damages threshold, broadband temperature level matching as well as exceptional optical uniformity are beneficial to improve the security of laser outcome power, specifically in the frequency triple of Nd: YAG laser has a wide variety of applications.
Application: It has a wide range of associated areas in the third, fourth and 5th harmonics of Nd: YAG lasers (355nm, 266nm and also 213nm, specifically), the second and also third harmonics of Ti: Sapphire amplifiers (400nm and 266.7 nm) as well as various other associated 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 known as potassium dideuterium phosphate crystal, chemical formula KD2PO4, is an extensive electro-optical crystal product.
Attributes: KDP as well as DKDP (KD * P) crystals have the advantages of high resistance to light damages limit, high electro-optic coefficient, excellent ecological resistance, portable design, as well as convenience as well as modification.
Application: It is commonly made use of in modern fields such as laser regularity conversion, electro-optic modulation as well as electro-optic quick switching, can be utilized to produce low-cost and massive finished nonlinear elements ideal for double frequency (SHG) and also triple frequency (THG) fields.
(3) KTP crystal
Summary: KTP crystal, also known as potassium titanium phosphate crystal, whose chemical formula is KTiOPO4, is a crystal product with superb nonlinear as well as electro-optical residential or commercial properties.
Qualities: KTP has the residential or commercial properties of high electro-optical coefficient and low dielectric continuous, which can operate at high frequency and also be utilized as an electro-optical Q-switched crystal. KTP also has outstanding regularity doubling efficiency:
- Large nonlinear coefficient
- No declination Angle
- High optical damages threshold
- Little modification in stage matching conditions with temperature level
Application: utilized in tool as well as small power Nd: YAG and Nd: YVO4 laser output 1064-532nm laser regularity increasing crystal products.
(4) LN (LiNbO3) crystals
Description: LiNbO3 crystal, also known as lithium niobate crystal, described as LN crystal, is an electro-optical crystal with superb thorough efficiency.
Attributes: Compared with various other electro-optical crystals, the crystal has the advantages of small size, challenging decidualization, huge electro-optical coefficient, large transparency range, high electro-optical efficiency, reduced absorption loss and reduced damages threshold.
Application: It has a variety of applications in relevant fields, such as electro-optic modulators as well as Q-switches in Nd: YAG, Nd: YLF and Ti: Sapphire lasers and modulators in optical fibers. At the same time, it can be used in 532nm, 1064nm and also 2940nm lasers, with frequency doubling over 1000 nm wavelength and optical parameter boosting of 1064nm pump light.
