Once the mixture has been entirely melted, it's then allowed to cool slowly. This gradual cooling procedure is important, since it permits BBO crystals to form progressively with the liquid mixture. The speed of cooling is diligently regulated to promote the growth of huge, significant-quality crystals.
When selecting an SHG crystal, the heartbeat length from the laser supply need to be taken into consideration. A mismatch between the duration and crystal thickness will result in SHG pulses longer in time and narrower in spectral content material than possible under great circumstances.
The damage analysis is going to be carried out on an analogous optic (shopper's optic will not be weakened). Tests might bring about additional prices or guide situations. Make contact with Tech Support For more info.
It's commonly useful for nonlinear frequency conversion from the ultraviolet, obvious, and near-infrared. The BBO crystal could be the most critical nonlinear crystal for near-infrared optical parametric chirped-pulse amplifiers, which now deliver couple optical cycle pulses with large regular and ultrahigh peak powers.
BBO is of particular worth within the seen and far UV. A wide variety of stage-matching apps are possible, such as the pursuing:
The calculation above assumes a uniform beam depth profile. You must now contemplate hotspots from the beam or other non-uniform intensity profiles and roughly estimate a optimum energy density.
Many of the normal nonlinear crystals like BBO, LBO, BiBO or KTP for frequency doubling, tripling and quadrupling of the fundamental laser radiation are available from stock. Customer-precise dimensions and AR coatings will also be supplied at competitive costs.
When pulse lengths are amongst 1 ns and 1 µs, laser-induced damage can arise either due to absorption or possibly a dielectric breakdown (thus, a person have to check each CW and pulsed LIDT). Absorption is either due to an intrinsic home in the optic or on account of floor irregularities; Therefore LIDT values are only valid for optics Conference or exceeding the floor excellent technical specs specified by a manufacturer.
The spatial walk-off angle is determined by the scale in the beam plus the crystal duration. While the angle could be major, it is usually tiny, generally on the get of 10 mrad, and may be neglected.
As an alternative to decompose the SHG polarization into elements Ex and Ez, the light is often referred to as an extraordinary wave (E'e) which has a refractive index, n'e. From the diagram on the best, n'e, which depends upon θ, is indicated by the intersection with the conic section illustrated by the purple ellipse With all the XZ airplane.
Newlight's BBO crystals are broadly Employed in second, third, fourth or fifth harmonic generations for prime electrical power noticeable/UV sources, and optical parametric conversions for prime electricity broadly tunable resources.
In frequency conversion, BBO crystals are used to alter the color of laser light, enabling the manufacture of a variety of hues that aren't directly obtainable from available laser sources. In electro-optic modulation, they are used to manage the depth, section, polarization, or course of the laser beam.
Therefore, the second harmonic pulse spectrum, shown on the appropriate, includes a spectral width close to similar to The perfect circumstance. Ideally, every single frequency in the fundamental pulse spectrum can be simultaneously period matched.
flux-developed KTP and RTP with its website significant nonlinearity, also in variants with large gray monitoring resistance