These crystals are exclusive as a result of their capability to change the frequency of light passing by means of them, a assets that is extremely sought after in different fields such as laser technological innovation and quantum physics. The flexibility of BBO crystals would make them a crucial ingredient in lots of Sophisticated optical systems.
Regretably, it can be very hard to match the LIDT specification of the optic to the laser. You'll find various regimes through which a pulsed laser can injury an optic and this is based within the laser's pulse duration. The highlighted columns inside the desk beneath define the suitable pulse lengths for our specified LIDT values.
To be able to use the required CW damage threshold of an optic, it's important to know the following:
This efficiency is important, especially when a person considers the era from the 266nm wavelength, where by even slight inefficiencies can result in important Power losses.
And finally, the huge-angle tunability of BBOs facilitates customization like hardly ever prior to. Based on the precise specifications of the software, the crystal could be adjusted with precision, making sure the output is usually optimized.
In the event the Rayleigh range is under the crystal thickness, the gap over which the beam is optimally intensive is fewer than the crystal thickness.
The 2nd harmonic frequency wave is produced as a unprecedented wave, and that is polarized orthogonal to the elemental-frequency everyday wave.
As illustrated in the here next desk, the shorter the crystal, the wider the reference pulse spectrum. The desk beneath assumes a essential Middle wavelength from the around-IR.
When pulse lengths are among 1 ns and 1 µs, laser-induced harm can happen either due to absorption or even a dielectric breakdown (as a result, a user need to Test both CW and pulsed LIDT). Absorption is possibly on account of an intrinsic assets of the optic or because of surface irregularities; Hence LIDT values are only valid for optics Assembly or exceeding the surface area excellent requirements supplied by a manufacturer.
A5: Of course, BBO crystals have fantastic thermal balance and might retain their Attributes at area temperature. Therefore they are often Utilized in a wide array of environments without the need of necessitating Specific temperature Regulate.
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For beams using a higher PRF both the normal and peak powers have to be in comparison with the equivalent CW ability. Moreover, for extremely clear components, There's minimal to no drop in the LIDT with rising PRF.
The temporal walk-off is often regarded as serious when the temporal lag exceeds the period of the elemental pulse. Critical stroll-off may end up in temporal lag that irreparably boosts the duration of your output 2nd harmonic pulse.
This information dives deep into the advantages and exclusive Attributes of BBO crystal and its paramount significance in productive frequency doubling and harmonics technology at 266nm.