Not known Facts About a-BBO Crystal
Not known Facts About a-BBO Crystal
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Regrettably, it can be very hard to match the LIDT specification of the optic in your laser. You can find multiple regimes in which a pulsed laser can harm an optic and this is based on the laser's pulse duration. The highlighted columns inside the desk down below outline the suitable pulse lengths for our specified LIDT values.
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Instead of the reference pulse energy spectrum comprising an apodization filter, within the spatial area the filter could well be in NA. The angular area apodization filter even so, is just in one-dimension outlined with the aircraft k and .
We use Numerical Aperture (NA) to explain the extent of this angular content material. Preferably, the basic laser mild could be collimated through the crystal, given that collimated gentle resembles a gaggle of rays aligned to the identical course with an NA of zero.
Now Examine the utmost electric power density to that which is specified because the LIDT to the optic. In the event the optic was tested at a wavelength besides your running wavelength, the destruction threshold should be scaled properly.
Their significant injury threshold and excellent thermal steadiness make them ideal for use in high-electric power laser devices, when their extensive transparency assortment permits them to check here work with a wide selection of laser wavelengths.
Some suppliers' SHG crystals, which include Thorlabs', provide near-period-matched ailments for Ordinarily incident input mild for the specified elementary frequency. These makers polish the faces on the SHG crystals these kinds of that the angle among the Typically incident light and also the optic axis will be the phase-matched angle for the required frequency.
But BBO crystals stand resilient, making sure that units continue to operate with out hiccups, minimizing downtimes and ensuring cost-usefulness Over time.
Fluorescence excitation is an additional realm the place the 266nm era showcases its significance. Fluorescence involves the absorption of light by a fabric and the subsequent emission of light at a different wavelength. The 266nm light is very productive in enjoyable specified fluorescent resources, generating them glow brightly and enabling for their detection and study.
This calculation assumes a uniform beam intensity profile. You should now regulate this energy density to account for hotspots or other nonuniform intensity profiles and approximately estimate a most energy density. For reference a Gaussian beam usually incorporates a optimum Strength density that's two times that on the one/e2 beam.
When comparing an LIDT specified for a pulsed laser to your laser, it is essential to know the following:
When an input pulse's spectral variety is equal to or narrower compared to the reference pulse, the generated next harmonic pulse provides a duration that's shorter by a factor of 1/√two in addition to a spectral width that may be broader by an element of √two.
Additionally, the structural and compositional attributes of BBO supply it with exceptional thermal balance and resistance towards environmental difficulties.