Home » Nd:YVO4 crystal

Nd:YVO4 crystal

by Darshan Fame
Nd:YVO4 crystal

Nd:YVO4 crystals are positive uniaxial crystals that belong to the tetragonal system. Since its introduction in 1966, Nd:YVO4 crystal has been widely recognized as an important laser material.

Nonetheless, the researchers found flaws in the scattering center, the absorption color center, and so on. It is, therefore, difficult to expand top-notch crystals to the dimensions needed for a flash pump.

Luckily, it has exceptional absorption as well as gains to the wavelength of diode radiation. And the transmission section is huge. The output laser has excellent polarization features. These suffice to cover the imperfections of its little growth size.

Advantages of Nd:YVO4 crystal

Nd: YVO4 crystal has exceptional properties. Compared to another commonly utilized Nd: YAG crystal (neodymium-doped yttrium aluminium garnet crystal), its pump broadband is much more substantial. The absorption transmission capacity efficiency is higher. The promoted emission cross-section is much more thorough and also has excellent growth value. Nd: YVO4 crystals are utilized in conjunction with nonlinear optical crystals such as LBO crystals, BBO crystals, KTP crystals, etc. It can understand frequency-doubling conversion and adjust functioning wavelength. The all-solid-state laser made from Nd: YVO4 crystal can output near-infrared light, green light, blue light, ultraviolet light and so on.

  • At regarding 808 nm pump data transfer, regarding the Nd:YAG five times
  • Section at 1064 nm of the promoted exhaust of radiation is an Nd:YAG three times.
  • Light damages threshold is reduced, high slope efficiency
  • Uniaxial crystal axis, the output of linear polarization

Disadvantages of Nd:YVO4 crystal

Compared to the standard Nd: YAG crystal, Nd: YVO4 has the advantages of a much higher absorption coefficient, a higher emission cross section, better polarization absorption and discharge characteristics, a bigger absorption transmission capacity, and also ignorance of the temperature modification of the diode. For that reason, it is widely utilized in LD-pumped solid-state lasers.

Nonetheless, it has a large emission cross-section as well as a short upper power lifetime. The energy storage ability of Nd:YVO4 is a lot lower than that of Nd:YAG. not conducive to the high peak power of the Q switch pulse output. Their advantages are limited to continuous wave output, high ordinary control, and high conversion effectiveness. On top of that, the thermal conductivity of Nd:YVO4 is very low, only half that of Nd:YAG. For that reason, it is not for attaining a high-power continuous wave outcome.

Applications of Nd:YVO4 crystal

Neodymium-doped yttrium vanadate (Nd: YVO4) crystal is a sort of laser crystal with excellent efficiency, which is suitable for producing a laser diode pump, specifically a low-power laser. Compared with Nd:YAG, Nd:YVO4 has a greater absorption coefficient as well as a larger boosted discharge cross-section.

Laser diode-pumped Nd:YVO4 crystals are integrated with LBO, BBO, and KTP, as well as various other crystals with high nonlinear coefficients. It can achieve much better frequency-doubling conversion effectiveness. It can output near-infrared, green, and blue ultraviolet as well as solid-state lasers.

Nd: YVO4 crystals can be extensively made use of in optical communication, commercial laser processing, laser ranging, semiconductor discovery, information storage space, display, laser printing, medical inspection, equipment, scientific research study as well as other fields.

In addition, Nd: YVO4 diode-pumped solid-state lasers are swiftly changing typical water-cooled ion lasers and lamp-pumped lasers on the market, specifically in terms of miniaturization as well as single longitudinal setting outcome.

In the 21st century, numerous downstream sectors of Nd:YVO4 crystal are booming, and the application range of Nd: YVO4 crystal is frequently broadening with evident efficiency advantages.

Growth method

In the 1960s, Nd: YVO4 crystals were developed. It was removed from the salt-metavanadate thaw by the air conditioning approach. The size of the Nd: YVO4 crystal expanded by this technique was small. Since then, several development procedures for Nd: YVO4 crystal have actually been put forward, such as the Zhilar method, flame melting method, floating area growth method, Bryman method, and also the pull method. Currently, the development techniques for Nd:YVO4 crystal are different. The illustration approach is the mainstream Nd: YVO4 crystal growth procedure, which can expand huge, high-grade crystals.

Pulling method

Nd3+: YVO, crystal melting point is really high (about 1820 ℃), must utilize gold-dependent crucible development, gold-dependent crucible will certainly be oxidized at high temperature, should use a neutral gas (hydrogen) to protect the crucible.

By doing this, growing in an anoxic atmosphere, the dissolved part will certainly decompose right into low-priced vanadium oxide (part of YVO4 will break down right into YVO3), and oxygen deficiency will certainly take place in the crystal, leading to the generation of the color center.

Growing in an oxygen-rich atmosphere will lead to serious oxidation of the crucible. The reduced episcopes develop additions inside the crystal. This will bring about solid thaw volatilization, leading to part variance.

By utilizing different growing atmospheres in various phases, the oxygen deficiency in the crystal can be supplemented, the volatilization of basic materials can be inhibited, the single-phase growth of the crystal can be assured, and the crystal can not be smudged or spread because of oxygen shortage as a result of hypoxia.

Read more: Properties of BBO crystals

Related Posts

Leave a Comment

Techvilly is an online webpage that provides business news, tech, telecom, digital marketing, auto news, and website reviews around World.

Contact us: info@techvilly.com

@2022 – Techvilly. All Right Reserved. Designed by Techager Team