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Having said that, it’s crucial to Be aware that while BBO crystals can transmit UV light, they need to be handled with care when used in UV purposes to forestall likely damage to the crystal and ensure basic safety.
These Houses make BBO crystals highly attractive in various apps, from laser frequency conversion to electro-optic modulation. Their extensive transparency selection permits them to operate having a wide number of laser wavelengths, whilst their significant harm threshold ensures they might handle substantial-power laser beams with out degradation.
) is The real key for BBO to get substantial conversion efficiency. Restricted concentration of laser beam is just not advisable.
Hygroscopic crystal products deteriorate when they are not often saved in sufficiently dry air (or maybe a dry purge gasoline). This applies e.g. to KDP and BBO, and in a lesser extent to LBO. It could be practical to maintain this kind of crystal in a rather elevated temperature, that makes it simpler to continue to keep it dry.
The calculation above assumes a uniform beam intensity profile. You will need to now think about hotspots within the beam or other non-uniform intensity profiles and about determine a most electricity density.
Determine 22: The diagram at the highest exhibits two pulses with distinct Centre frequencies incident on a cloth. The group velocity hold off between the pulses if they enter the material is zero.
BBO crystals are utilized in a wide array of programs due to their exceptional optical Qualities. They are generally Employed in laser techniques for frequency conversion, together with next, third, and fourth harmonic generation. This permits for the production of laser gentle at distinct wavelengths from an individual input wavelength.
These processes require Mixing two or more input beams of light with different frequencies to supply a website consequence beam with a new frequency.
BBO crystals is often obtained from a variety of suppliers around the world. When picking a supplier, it’s essential to consider things such as the standard of the crystals, the supplier’s name, and the extent of customer care presented.
This home sets it besides linear optical components that don’t alter the frequency of sunshine passing via them. This kind of distinguishing function kinds the inspiration for your myriad of applications that BBO can provide.
The crystal axis is c. The chief ray is parallel for the direction utilized to measure the tuning angle (θ), which is optimized throughout section matching. Conversion effectiveness is optimized for rays parallel to your chief ray and worse for rays at larger angles (ψ) to the Main ray.
The temporal walk-off is frequently regarded as serious if the temporal lag exceeds the duration of the elemental pulse. Significant walk-off may result in temporal lag that irreparably boosts the duration of the output next harmonic pulse.
The duration in the SHG crystal appreciably impacts the spectral width of your reference pulse, or alternatively the bandwidth from the SHG filter.