Everything about a-BBO Crystal
Everything about a-BBO Crystal
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The calculation higher than assumes a uniform beam intensity profile. You should now take into account hotspots during the beam or other non-uniform depth profiles and approximately calculate a greatest energy density.
A2: Indeed, prolonged publicity to humidity can degrade the optical effectiveness of BBO crystals. Humidity can cause drinking water absorption around the crystal floor, which may affect its optical Houses.
The Strength in both of those waves propagates in directions determined by their Poynting vectors. Snell's law won't explain the way of Electricity flow, nevertheless it can be employed to determine the way on the k-vector within the crystal.
This efficiency is vital, specially when just one considers the generation of the 266nm wavelength, the place even small inefficiencies may result in significant Strength losses.
We use Numerical Aperture (NA) to explain the extent of this angular information. Preferably, the basic laser light-weight will be collimated through the crystal, because collimated light-weight resembles a bunch of rays aligned to the identical route using an NA of zero.
Now Evaluate the utmost electricity density to that which happens to be specified given that the LIDT for the optic. If the optic was tested in a wavelength other than your running wavelength, the problems threshold must be scaled appropriately.
Their substantial injury threshold and fantastic thermal security make them suited to use in significant-electric power laser programs, even though their broad transparency selection makes it possible for them to work having a broad variety of laser wavelengths.
On the other hand, while BBO crystals can run at home temperature, Serious temperatures really should even now be averted as they can influence the crystal’s section-matching situations and most likely cause problems.
BBO crystals need to be managed with care to avoid scratching or harming their surfaces. They should be saved within a dry, cool area and stored faraway from direct sunlight. Regular cleaning which has a comfortable fabric or air blower is suggested to take care of their optical efficiency. When managing BBO crystals, it’s vital that you use gloves to circumvent oils through the pores and skin from contaminating the crystal surface area.
Fluorescence excitation is an additional realm wherever the 266nm era showcases its significance. Fluorescence requires the absorption of light by a fabric and the following emission of light at a distinct wavelength. The 266nm a-BBO Crystal mild is highly efficient in thrilling particular fluorescent materials, earning them glow brightly and allowing for for his or her detection and examine.
Thorlabs provides a good selection of optics optimized for use with femtosecond and picosecond laser pulses. Please see below for more information.
Tailor made coatings is usually placed on the crystal surfaces to reinforce their overall performance at particular wavelengths or to protect the crystal from environmental elements. However, it’s imperative that you note that any customization should be carried out cautiously in order to avoid degrading the crystal’s optical Homes.
The temporal stroll-off is usually deemed extreme when the temporal lag exceeds the period of the fundamental pulse. Serious walk-off may end up in temporal lag that irreparably improves the duration of the output 2nd harmonic pulse.
This article dives deep into the advantages and exceptional properties of BBO crystal and its paramount value in successful frequency doubling and harmonics technology at 266nm.