Top a-BBO Crystal Secrets
Top a-BBO Crystal Secrets
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Regular cleaning and suitable storage might help prolong the lifespan of BBO crystals. It’s also essential to steer clear of exposing the crystals to conditions outside the house their specified running selection, as this could potentially cause long-lasting destruction.
β-BBO Crystal—a broadly used nonlinear crystal for frequency conversion during the ultraviolet, visible and in close proximity to-infrared
There are 2 velocities that outline the propagation of light in optical media: the period and group velocities. The period velocity is definitely the velocity from the copyright, the oscillation of the electrical subject, and the velocity that is matched amongst the elemental and 2nd harmonic frequencies for phase matching. The period velocity relative on the pace of light within a vacuum is defined through the index of refraction.
Nonetheless, it’s crucial to Observe that although BBO crystals can cope with higher electrical power, they must nonetheless be employed within their specified energy vary to stop opportunity hurt and assure ideal efficiency.
Other section matching problems are also possible. Essential Sort-II section matching utilizes an oe-o or eo-e for beneficial and adverse uniaxial crystals. Non-critical stage matching utilizes crystal temperature to accomplish stage matching as an alternative to angular tuning.
The four lower figures illustrate that the team velocity hold off (temporal stroll-off) will increase because the pulses propagate by way of the material. The temporal walk-off is illustrated for distances Z0 through Z3, that happen to be indicated over the diagram at top.
Even though the above mentioned treatment presents a superb guideline for LIDT values, you should Get in touch with Tech Assist In case your wavelength is different from the desired LIDT wavelength. Should your energy density is fewer than the adjusted LIDT on the optic, then the optic should really perform for your software.
It is typically needed to focus the incident light-weight within the crystal for SHG apps, since efficient era of 2nd harmonic gentle involves superior peak intensities, such as 109 W/cm2. When utilizing femtosecond pulses with moderate energies during the nanojoule assortment, obtaining the read more necessary peak intensities can involve small focal places.
Pumped by the fourth harmonic of the Nd:YAG laser (at 266nm), a tunable OPO with signal wavelength array in between 422nm and 477nm is noticed by angle-tuning a type I BBO crystal. Pumped by a 1mJ, 80fs Dye laser at 615nm, the OPA with two BBO crystals yields more than 50µJ (maximum a hundred thirtyµJ),
Regular cleansing and correct storage may also help lengthen the lifespan of BBO crystals, making certain their continued contribution to the field of optics and photonics.
The basic resource will be the dye laser radiation pumped by the second harmonic of a Q-switched Nd: YAG laser. A walk-off compensated configuration Together with the BBO crystal pair has enabled us to comprehend this kind of high conversion efficiency in the conversation.
Since the dynamics of this method are really subject matter to experimental parameters, it's tricky to arbitrarily predict the precise results on the next harmonic pulse. These results can consist of back again conversion, wherein next harmonic light-weight is converted back to basic gentle, and spectral narrowing of the SHG pulse.
The 266nm technology refers back to the production of ultraviolet mild having a wavelength of 266 nanometers.
Finally, spectroscopy, the research of interactions involving issue and electromagnetic radiation, enormously benefits within the 266nm technology. In spectroscopic apps, distinctive wavelengths of sunshine interact in a different way with supplies, furnishing a spectrum that may be analyzed to determine the material’s properties or composition.