Once the combination has become entirely melted, it is then permitted to amazing slowly but surely. This sluggish cooling procedure is vital, since it enables BBO crystals to kind step by step through the liquid mixture. The rate of cooling is carefully regulated to advertise The expansion of huge, high-good quality crystals.
Good day, thank you for calling Thorlabs. The wavelength ranges of the antireflective coatings on these β-BBO crystals align With all the respective wavelength bands that these crystals are optimized for. Requests for customizations may be created by reaching out to us at [email protected]
These Qualities make BBO crystals extremely attractive in different purposes, from laser frequency conversion to electro-optic modulation. Their vast transparency array lets them to work that has a wide choice of laser wavelengths, though their superior injury threshold makes sure they will take care of high-energy laser beams devoid of degradation.
It is greatly utilized for nonlinear frequency conversion while in the ultraviolet, noticeable, and in close proximity to-infrared. The BBO crystal will be the most critical nonlinear crystal for in the vicinity of-infrared optical parametric chirped-pulse amplifiers, which presently deliver handful of optical cycle pulses with large ordinary and ultrahigh peak powers.
, the angle between The sunshine's propagation path and the crystal's optic axis may be tuned so the refractive index of a certain frequency (ω) in the basic enter pulse particularly equals the refractive index of 2 times the enter frequency (2ω). It can be typical to improve section matching situations for that frequency at somewhere around the middle of the pulse's bandwidth.
Substantial injury threshold: BBO crystals have higher problems limitations that could rise up to their significant prime and regular electrical power without having degradation or harm.
Having said that, it’s crucial to Notice that though BBO crystals can deal with significant electric power, they ought to nevertheless be applied inside their specified electric power selection to forestall prospective problems and be certain optimal functionality.
Beta Barium Borate (BBO) crystals have taken the world of photonics by storm. The most impressive elements of these crystals is their revolutionary position in 266nm era.
For purchaser comfort the crystals is usually mounted within an one" anodized aluminum (Al) mount. The mounted crystals might be further mounted in a traditional 1" mirror mount to be angle tuned for period matching (as revealed to the proper). H2o-cooled mounts for high electricity apps may be offered upon ask for.
The stage matching angle could be adjusted by rotating the crystal throughout the y axis. An adjustment that is usually in a number of levels can both enhance the effectiveness of your crystal from the setup or match One more basic frequency inside the crystal's working assortment.
This property is especially helpful in purposes that require large-electrical power lasers or powerful gentle sources, as it makes sure the longevity and trustworthiness from the crystal in such demanding problems.
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The angular articles of the focused beam can be visualized by tracing click here rays with the lens towards the focal place. Just about every ray drawn in the lens into a tightly concentrated spot (Figure 23) can make another angle (ψ) Together with the Main ray, and also the array of angles boosts While using the NA. Because the array of angles will increase outside of the reference NA filter (or angular area apodization filter width), the section-matching from the rays beyond the filter width diminishes therefore decreasing the SHG conversion efficiency of Individuals rays.
Due to its outstanding Qualities BBO crystal features a number of benefits for various programs, like NOPA with fsec pulses, harmonics generation (around fifth) of Nd:YAG and Nd:YLF lasers, frequency doubling or tripling of femtosecond Ti:Sapphire and dye lasers, OPO at Sort 1 and kind two stage-matching, E/O switching for Pockels cells and many other.