About BBO Crystal
About BBO Crystal
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The amount of the solvent can be altered for a variety of crystal dimensions so the lens tissue is held damp for the whole drag but there is not any noticeable trace of solvent on the crystal surface after the drag is concluded. Inspect the floor and repeat if required, but only use Every single sheet of lens tissue when.
BBO is the only NLO substance that may be used to supply the fifth harmonic technology (5HG) of Nd:YAG lasers at 213 nm. As a result of a small acceptance angle and enormous angular walkoff, very good laser beam top quality (modest divergence, fantastic mode problem, and so on.
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The Z-axis is parallel for the optical axis from the crystal in addition to is Also called the marvelous axis. The X- and Y-axes are parallel to the optical axis and therefore are known as typical axes.
BBO is of particular value during the visible and much UV. Numerous types of stage-matching applications are probable, including the subsequent:
These types of resilience makes sure that its nonlinear properties aren't effortlessly compromised, rendering it a favorite in environments where regularity and reliability are paramount.
However, it’s imperative that you Notice that when BBO crystals can deal with higher electric power, they must nonetheless be employed in just their specified electricity variety to avoid prospective hurt and guarantee optimum overall performance.
Most of our common crystals come mounted into open ring holders. Make sure you Be aware the letter "H" in the item code which suggests that crystal is equipped mounted.
In quasi-section matching, the crystal product is “poled�?to possess up and down domains to counteract the section-mismatch of the fabric, exactly where the poling period is precise for the wavelengths of interaction.
By way of example, anti-reflective coatings is usually placed on lessen mild loss because of more info reflection, though protective coatings may be used to enhance the crystal’s resistance to environmental elements. Customization permits optimal effectiveness in certain purposes.
Alternatively, a little enclosure (with openings for light) can be designed around the crystal by using a continuous move of dry nitrogen of air into the enclosure. The dry nitrogen/air force desires only for being slightly earlier mentioned the ambiance to help keep the little quantity across the crystal dry and cleanse.
The place on the inexperienced curve depends upon θ. In such cases, the angle θ has long been tuned to offer a refractive index for 515 nm gentle that matches the refractive index for 1030 nm mild. This tuning angle is as a result optimized for Variety-I SHG stage matching in addition to a basic-frequency input beam of 1030 nm.
As is going to be mentioned below, You will find a focusing numerical aperture (NA) limitation to the SHG period-matching approach precisely analogous on the spectral stage matching limitation mentioned within the previous portion (
Humidity might cause drinking water absorption about the crystal surface area, which can degrade its optical performance. The caliber of the incident gentle, including its wavelength, intensity, and polarization, also can have an affect on the overall performance of BBO crystals in many applications.