About BBO Crystal
About BBO Crystal
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This efficiency is important, especially when a single considers the technology from the 266nm wavelength, the place even minimal inefficiencies can result in considerable Power losses.
g. in the form of “grey monitoring�? This kind of phenomena are notably popular for Procedure with ultraviolet light-weight. Note that a gradual degradation may also guide into instantaneous catastrophic damage by way of abnormal heat generation.
The temporal wander-off of the slower pulse with respect on the more rapidly may be a considerable portion of the pulse duration. This is illustrated in Figure 22.
So as to use the required CW hurt threshold of an optic, it's important to grasp the subsequent:
BBO is of individual worth in the visible and far UV. Lots of section-matching programs are possible, such as the adhering to:
The calculation over assumes a uniform beam depth profile. You need to now take into consideration hotspots during the beam or other non-uniform depth profiles and about compute a greatest energy density.
Their supremacy During this domain is not merely accidentally, but a result of their intrinsic and meticulously crafted Homes.
Beta Barium Borate (BBO) crystals are already a subject of fascination in the sector of optics and photonics because of their exclusive Homes. On this page, we purpose to reply 10 popular questions on BBO crystals, supplying a comprehensive idea of this interesting material.
For purchaser usefulness the crystals may be mounted within an 1" anodized aluminum (Al) mount. The mounted crystals is usually further more mounted in a conventional one" mirror mount to become angle tuned for period matching (as shown to the best). H2o-cooled mounts for high electric power purposes is usually provided upon check here request.
Other stage matching ailments will also be doable. Crucial Variety-II section matching makes use of an oe-o or eo-e for constructive and adverse uniaxial crystals. Non-vital period matching uses crystal temperature to realize period matching rather then angular tuning.
How are BBO Crystals Developed? BBO crystals are developed utilizing the flux method, which involves melting a mix of barium borate and barium fluoride and slowly but surely cooling it to form crystals.
As illustrated in the next table, the shorter the crystal, the broader the reference pulse spectrum. The table down below assumes a elementary Centre wavelength within the near-IR.
The angular information of the targeted beam is often visualized by tracing rays in the lens on the focal location. Every ray drawn through the lens to the tightly focused place (Determine 23) would make a special angle (ψ) with the Main ray, and the array of angles will increase While using the NA. As the selection of angles raises outside of the reference NA filter (or angular domain apodization filter width), the stage-matching from the rays beyond the filter width diminishes thus lessening the SHG conversion performance of Those people rays.
Inspect the crystal surface area for dust and stains by holding it in close proximity to a vivid seen-light-weight resource. Viewing at various angles can help see scattering from dust and stains. The crystal surface area needs to be cleaned as explained underneath if dust and stains are uncovered.