What Does BBO Crystal Mean?
What Does BBO Crystal Mean?
Blog Article
Following the mixture has long been fully melted, it's then permitted to interesting slowly. This slow cooling method is very important, mainly because it allows BBO crystals to type slowly with the liquid combination. The rate of cooling is thoroughly regulated to advertise The expansion of enormous, large-high quality crystals.
When the above mentioned course of action provides a good rule of thumb for LIDT values, you should Get in touch with Tech Help In case your wavelength is different from the desired LIDT wavelength. In the event your electrical power density is below the altered LIDT from the optic, then the optic ought to operate in your software.
Both have a comparatively lower hurt threshold, but never must be operated at superior intensities because of their superior nonlinearity. They may have a tendency for photorefractive outcomes, which might be harmful for frequency conversion, but are used for, e.g., holographic data storage in Fe-doped LiNbO3 crystals. The tendency for “photorefractive harm�?is dependent strongly on the fabric composition; e.g. it might be lessened via MgO doping and by utilizing a stoichiometric composition.
The effectiveness of BBO crystals is often affected by a number of elements. The quality of the crystal by itself is paramount, as defects or impurities can degrade its optical Homes. The temperature at which the crystal operates may influence its functionality, as variations in temperature may cause thermal expansion or contraction, probably altering the crystal’s optical Qualities.
For beams that has a significant PRF equally the standard and peak powers need to be compared to the equal CW electric power. On top of that, for hugely transparent products, You can find little to no drop in the LIDT with growing PRF.
On the other hand, to totally benefit from the possible of BBO crystals, it is essential to understand their Houses and the way to tackle and keep them adequately. These crystals call for very careful handling to avoid damage to their surfaces and will be stored in a dry, cool spot to take care of their optical general performance.
Now Evaluate the utmost ability density to that which happens to be specified as the LIDT for your optic. Should the optic was tested at a wavelength aside from your running wavelength, the hurt threshold needs to be scaled correctly.
the chemical durability; e.g., some crystal components are hygroscopic, Other folks undertake chemical adjustments when heated in a vacuum chamber for application of a dielectric coating
This calculation assumes a uniform beam depth profile. You will need to now regulate this energy density to account for hotspots or other nonuniform depth profiles and about calculate a optimum Strength density. For reference a Gaussian beam usually BBO Crystal contains a most Vitality density that is certainly 2 times that of your one/e2 beam.
The following can be a common overview of how laser induced hurt thresholds are calculated And exactly how the values may be utilized in identifying the appropriateness of an optic for the presented software. When choosing optics, it is vital to be aware of the Laser Induced Destruction Threshold (LIDT) of your optics getting used. The LIDT for an optic considerably depends upon the type of laser you might be employing. Constant wave (CW) lasers generally lead to injury from thermal results (absorption both from the coating or from the substrate).
Hello, I used to be wondering if It truly is feasible for yourself to create a BBO crystal using a custom coating at 532nm basic and 266nm 2nd harmonic generation. Finest, Ben
The manufacture of Beta-Barium Borate (BBO) crystals is a posh and meticulous course of action that requires a large standard of precision and skills. This method, generally known as the flux strategy, starts Along with the preparation of a mixture of barium borate and barium fluoride.
Hence, the next harmonic pulse spectrum, proven on the ideal, incorporates a spectral width approximately similar to The best situation. Preferably, every single frequency in the fundamental pulse spectrum might be simultaneously stage matched.
Another Similarly intriguing software is optical parametric oscillation. During this, BBO permits the conversion of a photon into two photons with diverse frequencies, the sum of which equals the first photon’s frequency.