Little Known Facts About LBO Crystal.
Little Known Facts About LBO Crystal.
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The best angle depends on the type of nonlinear system, the wavelength, along with the crystal thickness. Other approaches for acquiring phase-matching in LBO nonlinear crystals consist of temperature tuning and quasi-stage matching.
Pulsed reliable state UV lasers are investigated for generating the ultrashort wavelength deep ultraviolet light that presently arises from excimer lasers, as Employed in photolithography of semiconductor chips.
Hygroscopic crystal elements deteriorate when they're not constantly held in adequately dry air (or perhaps a dry purge fuel). This applies e.g. to KDP and BBO, As well as in a lesser extent to LBO. It could be handy to maintain this kind of crystal at a relatively elevated temperature, which makes it easier to maintain it dry.
Final but not the very least, large optical homogeneity makes sure uniform gentle propagation through the crystal, leading to better beam good quality and less distortions.
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Crystals for NCPM at an elavated temperature can be premounted in an oven with precision controller. Crystals employed at ~ 20 - 50 oC may also be premounted within a appropriate drinking water-cooled or TEC (ThermoElectric Cooler) cooled mount upon request.
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In the case of ultrashort pulses the large group velocity mismatch enforces the use of a shorter crystal, which needs substantial optical intensities for your presented conversion efficiency.
Beyond higher power lasers, this thermal stability extends LBO Crystals�?applicability to the wide array of environments with varying temperature disorders.
Having said that, if the application demands, these crystals also can endure sure elevated force situations. It is always suggested to consult with a crystal expert or seek advice from distinct manufacturer rules to determine the ideal circumstances for the distinct LBO Crystal and application.
The magnitude on the helpful nonlinear coefficient relies on the nonlinear tensor factors and on the used period-matching configuration. A large nonlinearity is vital notably Should the achievable optical intensities are lower.
SHG measurement can even be applied to ascertain the crystal high-quality and defects, such as domain structure and non-uniformity.
Crystals which are non-critically period-matched inside a crystal oven might exhibit difficulties in the event the crystal temperature here is improved much too promptly or far too generally. Specifically, anti-reflection coatings could possibly be ruined as a result of distinctive thermal expansion coefficients in the involved products.