Fascination About BBO Crystal
Fascination About BBO Crystal
Blog Article
In some instances, the mismatch could be compact. As an example, whenever a β-BBO crystal is utilized to frequency double 1550 nm light-weight and supply 775 nm mild, the group velocity mismatch is only some femtoseconds for every millimeter.
Having said that, it’s crucial that you Be aware that whilst BBO crystals can transmit UV gentle, they should be dealt with with care when used in UV applications to avoid opportunity damage to the crystal and ensure protection.
The temporal walk-off of the slower pulse with regard towards the more rapidly can be a considerable portion of the pulse length. This really is illustrated in Determine 22.
Quantum optics: BBO crystals serve for quantum optical experiments for instance knotted photon pair technology, quantum point out tomography, quantum cryptography, and quantum assessment.
Even perfectly beneath the brink for fast problems, some crystal materials exhibit a steady degradation inside the employed volume, e.
BBO crystals have two refractive indices: ne for amazing rays and no for normal rays. The difference between ne and no depends upon the wavelength of sunshine and the crystal’s temperature.
When laser light is concentrated to some location, the diameter on the beam waist is the focal location dimension, and the rate at which The sunshine diverges through the beam waistline is linked to the Rayleigh array (zR).
A lot of our conventional crystals arrive mounted into open ring holders. Please Take note the letter "H" inside the merchandise code which signifies that crystal is equipped mounted.
Beam diameter can be imperative that you website know when evaluating harm thresholds. Although the LIDT, when expressed in models of J/cm², scales independently of location dimension; large beam sizes are more likely to illuminate a larger variety of defects which can result in higher variances while in the LIDT [four].
Considering that the dynamics of this method are highly subject to experimental parameters, it truly is tricky to arbitrarily predict the exact outcomes on the next harmonic pulse. These outcomes can incorporate back again conversion, wherein second harmonic light is transformed again to essential gentle, and spectral narrowing on the SHG pulse.
When comparing an LIDT specified for the pulsed laser to your laser, it is important to know the next:
The spectrally narrowed SHG pulse spectrum is alleged to generally be apodized, due to the fact an result of the fundamental pulse exceeding the utmost input bandwidth Restrict would be the removal of the very best and cheapest frequencies with the SHG pulse spectrum.
Third harmonic technology (THG): We use THG to evaluate our pieces�?nonlinear conversion efficiency and phase-matching angle for a supplied input wavelength. We Guantee that our merchandise satisfy the specs for THG apps.
Lithium niobate (LiNbO3) and lithium tantalate (LiTaO3) are components with a comparatively robust nonlinearity. They are often used for nonlinear frequency conversion and in addition for electro-optic modulators. Both equally products can be found in congruent As well as in stoichiometric variety, with vital differences concerning periodic poling and photorefractive effects (see below). Lithium niobate and tantalate are definitely the most frequently utilised supplies within the context of periodic poling; the resulting materials are called PPLN (periodically poled lithium niobate) and PPLT, respectively, or PPSLN and PPSLT for the stoichiometric variations.