The Definitive Guide to BBO Crystal
The Definitive Guide to BBO Crystal
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A2: Indeed, prolonged exposure to humidity can degrade the optical performance of BBO crystals. Humidity may result in h2o absorption over the crystal area, which often can have an impact on its optical Houses.
Thorlabs provides a big choice of optics optimized to be used with femtosecond and picosecond laser pulses. You should see below To find out more.
Crystal life time can also be strongly depending on the fabric high quality, While particular degradation phenomena look like intrinsic constraints of the material.
For beams by using a substantial PRF both equally the common and peak powers needs to be compared to the equivalent CW energy. Additionally, for very clear resources, there is minor to no fall during the LIDT with increasing PRF.
In the case of Kind-I section matching and β-BBO crystals, the elemental light-weight propagates as an extraordinary wave during the crystal, when the 2nd harmonic mild propagates as an ordinary wave.
Now Examine the utmost electricity density to that and that is specified as the LIDT for that optic. Should the optic was tested at a wavelength apart from your working wavelength, the damage threshold needs to be scaled appropriately.
This difference triggers stage mismatch amongst many mild polarization components when propagating via a BBO crystal. Modifying the angle concerning the beam and crystal axes can compensate for this section mismatch.
The lifespan of BBO crystals will vary significantly dependant upon various things. These include things like how the crystals are utilised, how They can be dealt with, and the situations through which They're saved.
To stop this, BBO crystals really should be stored within a dry setting and correctly sealed when not in use. On top of that, any cleaning process really should be followed by thorough drying to eliminate any residual dampness.
The efficiency of your SHG method decreases considerably as the basic beam diverges from its emphasis, For the reason that pulse Strength is dispersed throughout a bigger beam cross portion.
As illustrated in the next desk, the shorter the crystal, the broader the reference pulse spectrum. The table under assumes a elementary Heart wavelength from the in the vicinity of-IR.
Thus, the second harmonic pulse spectrum, demonstrated on the proper, provides a spectral width around similar more info to the ideal scenario. Preferably, each and every frequency in the elemental pulse spectrum will be at the same time phase matched.
Humidity may cause h2o absorption within the crystal surface, which can degrade its optical effectiveness. The caliber of the incident light-weight, like its wavelength, depth, and polarization, could also impact the general performance of BBO crystals in different purposes.