Examine This Report on BBO Crystal
Examine This Report on BBO Crystal
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This good-tuning functionality ensures that BBO crystals can cater to equally generic and extremely specialized demands with equivalent finesse.
These Qualities make BBO crystals really fascinating in many applications, from laser frequency conversion to electro-optic modulation. Their broad transparency vary lets them to work with a wide range of laser wavelengths, although their superior hurt threshold ensures they could deal with high-electric power laser beams with out degradation.
) is The main element for BBO to get high conversion efficiency. Limited emphasis of laser beam isn't suggested.
The Type-I section matching course of action depends on matching the everyday and incredible indices of refraction for the fundamental and 2nd-harmonic frequencies, that's reached by way of precise orientation of the crystal optic axis and input propagation vector. A focused laser pulse, or beam, has angular articles, formally termed spatial frequencies, to provide the modest focal location.
They show great homogeneity over substantial volumes and also have a substantial problems threshold, but are hygroscopic and possess a minimal nonlinearity.
A proposed guideline for concentrating femtosecond laser pulses right into a nonlinear crystal is to take care of a Rayleigh vary which is at least quite a few moments for a longer time compared to the length on the SHG crystal. This minimizes the prospect of harming the crystal, along with reduces the detrimental effects of spatial phase mismatch and spatial (Poynting vector) stroll-off.
When 1 of these β-BBO Crystals is mounted while in the RSP1 mount, the crystal will be centered around the eight-32 (M4) gap within the mount's foundation without the will need for spacers.
Beam diameter can also be important to know when comparing hurt thresholds. Although the LIDT, when expressed in units of J/cm², scales independently of spot size; large beam dimensions are more likely to illuminate a bigger variety of defects which can lead to larger variances in the get more info LIDT [four].
Modest acceptance angle: BBO crystals have a little acceptance angle that limitations the enter gentle beam’s gentle beam divergence and top rated mode top quality for helpful regularity conversion.
Hello, I had been questioning if It really is doable in your case to supply a BBO crystal with a custom made coating at 532nm fundamental and 266nm second harmonic generation. Very best, Ben
While the test success are only representative of one coating operate, Thorlabs specifies destruction threshold values that account for coating variances.
The 266nm technology refers to the manufacture of ultraviolet mild by using a wavelength of 266 nanometers.
Lithium niobate (LiNbO3) and lithium tantalate (LiTaO3) are resources with a relatively sturdy nonlinearity. They tend to be utilized for nonlinear frequency conversion as well as for electro-optic modulators. The two resources can be found in congruent As well as in stoichiometric sort, with vital variances about periodic poling and photorefractive effects (see below). Lithium niobate and tantalate will be the most frequently utilized materials from the context of periodic poling; the resulting resources are identified as PPLN (periodically poled lithium niobate) and PPLT, respectively, or PPSLN and PPSLT to the stoichiometric versions.