This performance is significant, particularly when just one considers the technology from the 266nm wavelength, in which even slight inefficiencies can lead to major Electrical power losses.
Typical cleaning of BBO crystals can also be recommended to take care of their optical performance. This may be performed utilizing a smooth fabric or lens tissue moistened that has a mild solvent, for example isopropyl alcohol.
From the ray-model perspective, the propagation path defines the orientation of your central (Main) ray in Figure 23. The SHG procedure is impacted because of the variety of angles about which incident gentle propagates, because mild that's not parallel to the chief ray has reduced period-matching relative towards the chief ray.
Of course, BBO crystals is usually tailored to fulfill certain prerequisites. This includes custom dimensions, styles, and coatings. Personalized measurements and designs is usually cut to fit unique optical programs, though custom coatings could be applied to improve the crystal’s efficiency in sure programs.
2nd harmonic generation (SHG): We use SHG to evaluate our products�?nonlinear conversion efficiency and phase-matching angle to get a offered input wavelength. We warranty that our merchandise fulfil the requirements for SHG apps.
Substantial problems threshold: BBO crystals have large destruction limitations which will rise up for their large top rated and usual electric power devoid of degradation or destruction.
When laser gentle is targeted to your place, the diameter in the beam waistline is definitely the focal location sizing, and the speed at which The sunshine diverges through the beam waist is connected to the Rayleigh assortment (zR).
The size from the crystal is an important parameter to contemplate when optimizing the SHG course of action to the parameters of specific enter pulses. Absent period-matching and temporal stroll-off effects, the SHG output improves exponentially with crystal size. The goal when picking an SHG crystal is usually to equilibrium the crystal duration with the limitations based on the basic pulse. Decreasing the crystal thickness cuts down outcomes linked to both period-matching bandwidth limitations and temporal stroll-off, which can be immediately linked.
Physically, when the elemental spectrum is properly in the reference pulse spectrum, the SHG pulse intensity profile may be the sq. of the basic depth profile, successfully truncating the length. This situation is illustrated in Figure twenty.
It’s like using just one Take note and splitting it into two harmonious tones. This method might be critical in quite a few Highly developed optical experiments and systems.
Newlight's BBO crystals are already commonly Utilized in second, third, fourth or fifth harmonic generations for prime energy noticeable/UV resources, and optical parametric conversions for top electricity broadly tunable sources.
BBO nonlinear crystal is really a damaging uniaxial crystal. It provides section matching for many next-purchase interactions Nearly more than its overall transparency variety. This transparency ranges from 185 nm to 3.three µm, as inferred from transmittance measurements employing crystal samples of a few mm thickness.
BBO crystals need to be handled with treatment to stay away from scratching or harmful more info their surfaces. They ought to be stored in the dry, amazing put and stored faraway from immediate sunlight. Standard cleaning that has a gentle fabric or air blower is suggested to maintain their optical performance. When handling BBO crystals, it’s vital that you use gloves to forestall oils from your pores and skin from contaminating the crystal surface.
For the reason that refractive index would not range linearly with frequency in dispersive crystals like β-BBO, it can be not possible to optimally period match each and every frequency in the input pulse's spectral variety Along with the corresponding second harmonic frequency during the created pulse.