New Step by Step Map For BBO Crystal
New Step by Step Map For BBO Crystal
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These raw components are thoroughly measured and blended in exact proportions to make sure the optimal composition of your resulting crystals.
When selecting an SHG crystal, the heartbeat length of the laser source have to be taken into consideration. A mismatch in between the duration and crystal thickness will bring about SHG pulses extended in time and narrower in spectral content than probable less than suitable disorders.
Thermal fluctuations are a priority in lots of experimental and industrial setups. Still, BBO crystals�?intrinsic thermal security ensures that they don’t just endure but thrive in these types of situations.
) is The important thing for BBO to acquire higher conversion efficiency. Restricted target of laser beam isn't proposed.
The angular content material on the resultant SHG pulse, or beam, during the dimension of the angular filter is reduced from a super circumstance. Inside the perpendicular dimension, the SHG beam preserves the angular content material of the enter beam, given that there’s no angular filter in that dimension. A diverging beam with asymmetric NA’s, i.e. during the horizontal and vertical dimensions, causes an elliptical beam.
BBO crystals have two refractive indices: ne for remarkable rays and no for ordinary rays. The difference between ne and no is dependent upon the wavelength of sunshine as well as crystal’s temperature.
You should Be aware that We've got a buffer created between the specified hurt thresholds on the web and the checks which Now we have performed, which accommodates variation in between batches. On ask for, we can offer specific examination information and facts and also a screening certification.
When pulse lengths are concerning 1 ns and 1 µs, laser-induced harm can come about both because of absorption or possibly a dielectric breakdown (as a result, a consumer must Check out each CW and pulsed LIDT). Absorption is both due to an intrinsic home with the optic or as a result of surface area irregularities; thus LIDT values are only valid for optics Assembly or exceeding the surface top quality technical specs provided by a maker.
For shopper ease the crystals may be mounted within an 1" anodized aluminum (Al) mount. The mounted crystals is usually additional mounted in a conventional one" mirror mount to become angle tuned for period matching (as proven to the appropriate). Water-cooled mounts for high electricity programs is usually presented on request.
To forestall this, BBO crystals must be stored inside a dry atmosphere and properly sealed when not in use. In addition, any cleansing approach needs to be website followed by thorough drying to eliminate any residual dampness.
This house is particularly beneficial in purposes that entail large-electrical power lasers or intense mild resources, since it guarantees the longevity and trustworthiness on the crystal in this sort of demanding circumstances.
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As will probably be discussed down below, You will find there's concentrating numerical aperture (NA) limitation to the SHG stage-matching approach precisely analogous into the spectral period matching limitation talked about within the previous part (
Considering that the refractive index isn't going to range linearly with frequency in dispersive crystals like β-BBO, it is not possible to optimally section match just about every frequency from the input pulse's spectral selection Together with the corresponding next harmonic frequency in the produced pulse.