Examine This Report on a-BBO Crystal
Examine This Report on a-BBO Crystal
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The crystal axis is c. The Main ray is parallel towards the way utilized to measure the tuning angle (θ), which is optimized all through stage matching. Conversion efficiency is optimized for rays parallel on the Main ray and worse for rays at much larger angles (ψ) to the chief ray.
Sad to say, it could be quite challenging to match the LIDT specification of the optic in your laser. There are actually various regimes by which a pulsed laser can destruction an optic which relies over the laser's pulse duration. The highlighted columns inside the table underneath define the relevant pulse lengths for our specified LIDT values.
The situation of the green curve relies on θ. In this case, the angle θ has been tuned to provide a refractive index for 515 nm gentle that matches the refractive index for 1030 nm light. This tuning angle is as a result optimized for Kind-I SHG section matching and also a fundamental-frequency enter beam of 1030 nm.
A: A large hurt threshold assures the crystal can take care of more electrical power without degrading, bringing about longer lifespan and constant efficiency.
Any contamination can degrade the optical functionality from the crystal and most likely lead to harm below substantial laser energy. When storing BBO crystals, they must be placed in the protecting situation to prevent Bodily check here destruction and dust accumulation.
They also have a higher problems threshold, letting them to handle large-electric power laser beams with out degradation. These distinctive Houses make BBO crystals a versatile Resource in several optical purposes.
The next harmonic frequency wave is generated as a unprecedented wave, and that is polarized orthogonal to the basic-frequency ordinary wave.
The harm Assessment might be carried out on an identical optic (customer's optic won't be broken). Testing may well lead to added expenditures or lead times. Contact Tech Assistance To find out more.
This residence sets it aside from linear optical supplies that don’t alter the frequency of sunshine passing by way of them. Such a distinguishing function forms the foundation for a myriad of applications that BBO can provide.
Having said that, there isn't a second order nonlinear influence in alpha-BBO crystal because of the centrosymmetry in its crystal framework and so it has no use for 2nd get nonlinear optical processes. As a substitute, alpha-BBO is widely utilized for fabrication of polarizers, polarizing beam displacers, period retarders, birefringent plates, and time delay compensators Specially those for UV and large ability lasers.
As will be talked about below, You will find there's focusing numerical aperture (NA) limitation to your SHG stage-matching system just analogous towards the spectral section matching limitation mentioned during the earlier portion (
This can be the so-known as oo-e arrangement, as The 2 photons from the fundamental are polarization-oriented together the regular axis and the 2nd harmonic photon's polarization is inside the incredible aircraft.
The temporal stroll-off is often thought of serious once the temporal lag exceeds the period of the basic pulse. Extreme stroll-off may result in temporal lag that irreparably enhances the duration in the output next harmonic pulse.
Lastly, spectroscopy, the analyze of interactions among matter and electromagnetic radiation, tremendously Positive aspects from your 266nm generation. In spectroscopic applications, diverse wavelengths of sunshine interact otherwise with products, delivering a spectrum that may be analyzed to ascertain the material’s properties or composition.