Sat. Mar 25th, 2023

1. Pockels Cells

Based on 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) is like a wave plate whose stage hold-up is associated with the applied electrical field. The polarization state of the outgoing light from the Pockels cell crystal will change to ensure that the strength and amplitude of the outward-bound light from the analyzer are regulated, which is electro-optic inflexion. Also, the inflexion gadget is called a Pockels cell.

2. Pockels cell crystal

The crystals that produce the electro-optical effect are called Pockels cell crystals, that is, electro-optical crystals. They each have their benefits. Currently, the major Pockel cell crystals on the market consist of BBO, DKDP, KTP, and LN (LiNbO3) crystals.

(1) BBO crystal

Description: BBO crystal, additionally referred to as barium metaborate crystal, with chemical formula BaB2O4, is an electro-optic and also nonlinear crystal with exceptional, thorough properties.

Functions: BBO crystal has a really vast light transmission range, extremely low absorption coefficient, as well as a weak piezoelectric ringing result; compared with other electro-optical modulation crystals, it has a greater extinction proportion, a bigger phase matching angle and High resistance to light damages limit, broadband temperature level matching as well as exceptional optical uniformity are beneficial to boost the security of laser result power, especially in the frequency triple of Nd: YAG laser has a wide range of applications.

Application: It has a large range of associated fields in the third, fourth as well as fifth harmonics of Nd: YAG lasers (355nm, 266nm and also 213nm, respectively), the second and 3rd harmonics of Ti: Sapphire amplifiers (400nm and also 266.7 nm) and other associated fields. Application. It can also be applied to OPO arrangements, optical parametric oscillators, and electro-optical applications from near-infrared to deep ultraviolet.

(2) DKDP crystal

Summary: DKDP (KD * P) crystal, called potassium dideuterium phosphate crystal, chemical formula KD2PO4, is a specific electro-optical crystal item.

Attributes: KDP and also DKDP (KD * P) crystals have the advantages of high resistance to light damage threshold, high electro-optic coefficient, good ecological resistance, small design, as well as a benefit as well as modification.

Application: It is commonly utilized in sophisticated fields such as laser regularity conversion, electro-optic modulation, and rapid change. It can make affordable and large completed nonlinear elements ideal for double regularity (SHG) and triple frequency (THG) fields.

(3) KTP crystal

Description: KTP crystal, also called potassium titanium phosphate crystal, whose chemical formula is KTiOPO4, is a crystal product with superb nonlinear and electro-optical properties.

Qualities: KTP has the residential or commercial properties of high electro-optical coefficient and reduced dielectric consistency, which can work at high frequency and be utilized as an electro-optical Q-switched crystal. KTP also has superb frequency-increasing performance:

  • Huge nonlinear coefficient
  • No declination Angle
  • High optical damages limit
  • Little modification in stage matching problems with temperature level

Application: used medium and small power Nd: YAG and Nd: YVO4 laser outcome 1064-532nm laser regularity doubling crystal products.

(4) LN (LiNbO3) crystals

Description: LiNbO3 crystal, referred to as lithium niobate crystal or LN crystal is an electro-optical crystal with exceptional extensive efficiency.

Qualities: Compared with other electro-optical crystals, the crystal has the advantages of tiny size, not easy decidualization, huge electro-optical coefficient, large openness variety, high electro-optical efficiency, reduced absorption loss as well as reduced damage limit.

Application: It has a variety of applications in relevant fields, such as electro-optic modulators and also Q-switches in Nd: YAG, Nd: YLF, as well as Ti: Sapphire lasers and modulators in optical fibres. At the same time, it can be used in 532nm, 1064nm and 2940nm lasers, with frequency doubling over 1000 nm wavelength and optical specification amplification of 1064nm pump light.


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