The higher harm threshold of BBO crystals is especially vital in environments where high-depth lasers tend to be the norm. Traditional materials may possibly falter, degrade, or perhaps split under these types of intensities.
Unfortunately, it can be quite challenging to compare the LIDT specification of the optic on your laser. You can find multiple regimes by which a pulsed laser can problems an optic which is predicated around the laser's pulse length. The highlighted columns while in the table beneath define the applicable pulse lengths for our specified LIDT values.
There are 2 velocities that define the propagation of sunshine in optical media: the stage and group velocities. The section velocity may be the velocity with the provider, the oscillation of the electrical subject, and also the velocity that is certainly matched among the elemental and next harmonic frequencies for stage matching. The section velocity relative to the velocity of light in a very vacuum is defined via the index of refraction.
Nevertheless, it’s essential to Be aware that whilst BBO crystals can cope with superior ability, they ought to continue to be employed in just their specified electric power array to stop prospective injury and be certain ideal efficiency.
BBO crystals is usually cleaned utilizing a soft cloth or air blower. For stubborn stains, a delicate detergent or isopropyl Liquor may be used. It’s crucial that you prevent making use of abrasive elements that may scratch the crystal’s area. When cleansing BBO crystals, it’s essential to use a gentle, round movement to avoid scratching the area.
Remember to Be aware that We've got a buffer designed between the specified destruction thresholds online and the exams which Now we have done, which accommodates variation concerning batches. On ask for, we can provide personal exam details plus a screening certificate.
Bodily, when the fundamental spectrum is properly within the reference pulse spectrum, the SHG pulse depth profile is the square of the fundamental intensity profile, effectively truncating the length. This situation is illustrated in Determine 20.
The angular content of a targeted beam is often visualized by tracing rays from the lens for the focal place. Each ray drawn from the lens to some tightly targeted location (Determine 23) tends to make a different angle (ψ) Using the chief ray, and also the array of angles will increase Along with the NA. Given that the array of angles will increase past the reference NA filter (or angular domain apodization filter width), the phase-matching of your rays outside of the filter width diminishes for that reason lowering the SHG conversion effectiveness of These rays.
Considering that the refractive index won't change linearly with frequency in dispersive crystals like β-BBO, it is actually impossible to optimally phase match each and every frequency during the input pulse's spectral array While using the corresponding 2nd harmonic frequency in the generated pulse.
Common cleansing and suitable storage can assist prolong the lifespan of BBO crystals, ensuring their ongoing contribution to the sphere of optics and photonics.
Thorlabs offers a big variety of optics optimized to be used with femtosecond and picosecond laser pulses. You should see down below To find out more.
This great-tuning capability implies that BBO crystals can cater to both of those generic and extremely specialized demands with equivalent finesse.
The second harmonic light-weight is then polarized parallel to your aircraft. Angle tuning adjusts θ and is executed by rotating the crystal round the Y-axis.
And lastly, spectroscopy, the review of interactions in between make any difference and electromagnetic radiation, considerably Rewards from the 266nm era. In spectroscopic applications, unique wavelengths of light interact otherwise with components, furnishing a spectrum which can here be analyzed to ascertain the material’s Houses or composition.