Everything about a-BBO Crystal

Everything about a-BBO Crystal

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The calculation over assumes a uniform beam intensity profile. You will need to now contemplate hotspots from the beam or other non-uniform intensity profiles and roughly estimate a highest ability density.

On the other hand, in lots of cases, the difference in the fundamental and second harmonic pulse velocities can result in one pulse to drastically lag one other.

So that you can use the required CW damage threshold of the optic, it's important to grasp the next:

In quasi-stage matching, the crystal product is “poled�?to possess up and down domains to counteract the period-mismatch of the fabric, the place the poling interval is particular towards the wavelengths of conversation.

And lastly, the large-angle tunability of BBOs facilitates customization like by no means ahead of. Dependant upon the specific specifications of an software, the crystal might be modified with precision, making sure that the output is always optimized.

In the event the Rayleigh variety is fewer than the crystal thickness, the space above which the beam is optimally rigorous is less than the crystal thickness.

While the take a look at final results are only agent of 1 coating operate, Thorlabs specifies problems threshold values that account for coating variances.

Even so, when BBO crystals can operate at place temperature, Extraordinary temperatures must however be avoided as they could have an affect on the crystal’s stage-matching ailments and potentially result in damage.

For the reason that refractive index won't change linearly with frequency in dispersive crystals like β-BBO, it can be not possible to optimally period match just about every frequency while in the input pulse's spectral vary Along with the corresponding second harmonic frequency in the produced pulse.

A5: Of course, BBO crystals have excellent thermal stability and might retain their properties at space temperature. Which means they may be used in an array of environments with no demanding Distinctive temperature control.

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For beams that has a large PRF both of those the normal and peak powers should be when compared to the equal CW ability. Moreover, for highly transparent components, You can find very little to no drop within the LIDT with growing PRF.

The duration from the crystal is a vital parameter to look at when optimizing the SHG procedure to the parameters of individual enter pulses. Absent period-matching and temporal wander-off effects, the SHG output increases exponentially with crystal length. The objective when selecting an SHG crystal will be to equilibrium the crystal duration with the limitations determined by the basic pulse. Reducing the crystal thickness lowers outcomes relevant to both of those section-matching bandwidth limits and temporal wander-off, which are straight related.

This informative article dives deep into the benefits and distinctive properties of BBO crystal and its paramount relevance in economical read more frequency doubling and harmonics generation at 266nm.