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β-BBO Crystal—a greatly employed nonlinear crystal for frequency conversion in the ultraviolet, obvious and in the vicinity of-infrared

Any scratches can degrade the optical performance from the crystal and most likely cause hurt below substantial laser electric power. For stubborn stains, a solution of delicate detergent or isopropyl Alcoholic beverages may be Carefully applied to the crystal surface then rinsed off with distilled h2o.

Beam diameter is also essential to know when evaluating injury thresholds. When the LIDT, when expressed in models of J/cm², scales independently of spot size; massive beam sizes usually tend to illuminate a larger range of defects which can cause larger variances during the LIDT [4].

Various factors can have an effect on the effectiveness of BBO crystals. These include temperature, humidity, and the standard of the incident light-weight. Right dealing with and storage can assist preserve the crystal’s overall performance. Temperature can have an affect on the period-matching disorders of BBO crystals, which subsequently influences their performance in frequency conversion apps.

). This spatial focusing constraint over the SHG system will typically lead to the crystal duration normally becoming below the Rayleigh choice of the enter more info concentrated pulse.

Figure 14 demonstrates a departure from an ideal polarization orientation for Variety-I SHG, wherever the incident elementary industry provides a linear polarization but is rotated by a diploma γ from the principal ordinary axis .

The damage analysis will likely be completed on the same optic (buyer's optic will not be ruined). Screening may lead to extra charges or lead periods. Contact Tech Support for more information.

Now Review the most Electricity density to that that's specified as the LIDT to the optic. If your optic was tested at a wavelength other than your operating wavelength, the hurt threshold needs to be scaled correctly [3].

The temporal walk-off of your slower pulse with respect to the a lot quicker is often a substantial portion of the heartbeat duration. This is illustrated in Figure 22.

The two broad-bandwidth pulses and temporal walk-off lead to a reduction during the conversion efficiency, along with worsen the optical good quality of the next harmonic pulses. The suitable crystal thickness must be selected to reduce the two results.

The angular material in the resultant SHG pulse, or beam, from the dimension on the angular filter is lessened from a great scenario. From the perpendicular dimension, the SHG beam preserves the angular content material from the enter beam, because there’s no angular filter in that dimension. A diverging beam with asymmetric NA’s, i.e. while in the horizontal and vertical Proportions, results in an elliptical beam.

The temporal stroll-off is frequently viewed as intense in the event the temporal lag exceeds the period of the elemental pulse. Critical stroll-off may lead to temporal lag that irreparably enhances the length on the output 2nd harmonic pulse.

Generation of deep ultraviolet radiation at 210 nm by Kind-I third harmonic generation is achieved inside a pair of BBO crystals with conversion performance as significant as 36%.