Fascination About a-BBO Crystal
Fascination About a-BBO Crystal
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The calculation previously mentioned assumes a uniform beam depth profile. You must now contemplate hotspots while in the beam or other non-uniform depth profiles and around calculate a utmost energy density.
The length on the SHG crystal significantly influences the spectral width of your reference pulse, or alternatively the bandwidth from the SHG filter.
A second issue would be that the group velocity mismatch among the 2nd harmonic and basic-frequency pulses will end in one particular pulse lagging the other as The 2 propagate. This is named temporal stroll-off and can take place even below optimal period-matched problems.
A: Certainly, BBO crystals exhibit extraordinary thermal security, making them suitable for applications with varying temperatures.
Quite a few elements can impact the overall performance of BBO crystals. These contain temperature, humidity, and the standard of the incident light. Suitable managing and storage may help retain the crystal’s effectiveness. Temperature can have an affect on the period-matching conditions of BBO crystals, which subsequently has an effect on their effectiveness in frequency conversion purposes.
Now Assess the most ability density to that and that is specified as the LIDT with the optic. When the optic was analyzed in a wavelength in addition to your operating wavelength, the problems threshold need to be scaled properly.
When the take a look at benefits are only agent of one coating run, Thorlabs specifies harm threshold values that account for coating variances.
The angular content of the concentrated beam is often visualized by tracing rays from the lens to the focal spot. Each and every ray drawn from your lens to your tightly centered place (Determine 23) makes another angle (ψ) With all the Main ray, plus the selection of angles will increase While using the NA. Given that the choice of angles will increase over and above the reference NA filter (or angular domain apodization filter width), the section-matching on the rays outside of the filter width diminishes thus decreasing the SHG conversion effectiveness of those rays.
When pulse lengths are between 1 ns and 1 µs, laser-induced hurt can happen either as a result of absorption or perhaps a dielectric breakdown (thus, a user have to Examine both equally CW and pulsed LIDT). Absorption is either resulting from an intrinsic house in the optic or resulting from area irregularities; Therefore LIDT values are only valid for optics Conference or exceeding the surface area quality specifications offered by a company.
Hello, I used to be wondering if It truly is feasible for yourself to produce a BBO crystal having a tailor made coating at 532nm essential and 266nm second harmonic era. Most effective, Ben
It can be extensively used for nonlinear frequency conversion in the ultraviolet, visible, and in the vicinity of-infrared. The BBO crystal is definitely the most crucial nonlinear crystal for close to-infrared optical parametric chirped-pulse amplifiers, which now deliver few optical cycle pulses with substantial ordinary and ultrahigh peak powers.
Yes, BBO crystals could be customized In accordance with certain specifications. This incorporates personalized sizes, shapes, and coatings. Nonetheless, customization might influence the crystal’s Qualities and efficiency, so it should be accomplished by an experienced. Custom made measurements and designs is usually Slash from a bigger BBO crystal to fit precise purposes.
The temporal walk-off is commonly viewed as significant if more info the temporal lag exceeds the period of the basic pulse. Significant stroll-off may end up in temporal lag that irreparably improves the period with the output next harmonic pulse.
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