Everything about BBO Crystal
Everything about BBO Crystal
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A: Certainly, BBO crystals show outstanding thermal balance, building them suitable for applications with various temperatures.
A2: Sure, prolonged publicity to humidity can degrade the optical functionality of BBO crystals. Humidity may result in water absorption on the crystal surface area, which often can have an affect on its optical Homes.
From a ray-model point of view, the propagation path defines the orientation of the central (Main) ray in Determine 23. The SHG process is afflicted from the selection of angles more than which incident mild propagates, since light-weight that isn't parallel towards the Main ray has diminished section-matching relative to your Main ray.
The SHG gentle is polarized while in the XZ airplane and is also orthogonal to equally the Eo along with the k-vector. In lieu of decompose the polarization on the SHG light-weight into Ex and Ez components, the electric industry is often described as a rare wave (E'e). The refractive index for this amazing wave, n'e, variations like a function of θ. n'e(θ) might be calculated utilizing the equation in Figure 13. The ellipse defining the extraordinary index of refraction being a functionality of θ is a conic segment of the index ellipsoid.
Even nicely down below the threshold for instant injury, some crystal products exhibit a continuous degradation within the made use of volume, e.
High destruction threshold: BBO crystals have high injury boundaries which can get up to their large top rated and typical electricity without having degradation or damage.
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BBO crystals are used inside a big range of programs due to their Extraordinary optical Houses. They are generally Employed in laser techniques for frequency conversion, which include second, third, and fourth harmonic era. This permits to the manufacture of laser light at unique wavelengths from just one input wavelength.
Physically, when the basic spectrum is perfectly throughout the reference pulse spectrum, the SHG pulse depth profile would be the square of the fundamental intensity profile, properly truncating the length. This scenario is illustrated in Figure 20.
While this rule of thumb presents a typical trend, more info It is far from a quantitative Examination of LIDT vs wavelength. In CW apps, for instance, hurt scales more strongly with absorption in the coating and substrate, which does not automatically scale nicely with wavelength.
The efficiency on the SHG procedure decreases significantly as the fundamental beam diverges from its concentrate, Considering that the pulse Power is dispersed throughout a larger beam cross segment.
The position of the inexperienced curve relies on θ. In such a case, the angle θ has long been tuned to deliver a refractive index for 515 nm gentle that matches the refractive index for 1030 nm mild. This tuning angle is hence optimized for Style-I SHG period matching as well as a fundamental-frequency enter beam of 1030 nm.
Any contamination can degrade the optical functionality of your crystal and potentially result in damage beneath high laser electricity. When storing BBO crystals, they must be placed in a very protective case to circumvent Bodily problems and mud accumulation.
Optical parametric amplification (OPA): We use OPA to evaluate our pieces�?nonlinear conversion functionality and stage-matching angle for the furnished enter wavelength and sign/idler wavelengths. We assurance that our products fulfill the specs for OPA purposes.