a-BBO Crystal Secrets
a-BBO Crystal Secrets
Blog Article
This is the preview of membership articles, log in by using an establishment to examine entry. Accessibility this post
The length with the SHG crystal substantially has an effect on the spectral width on the reference pulse, or alternatively the bandwidth from the SHG filter.
The Rayleigh vary quantifies the space, measured within the beam waistline, about which the beam diameter is close to regular. The shorter the Rayleigh vary, the greater the rate of divergence.
In place of the reference pulse electricity spectrum comprising an apodization filter, in the spatial domain the filter might be in NA. The angular domain apodization filter even so, is barely in one-dimension defined through the aircraft k and .
The Electricity density of your respective beam really should be calculated with regard to J/cm2. The graph to the appropriate reveals why expressing the LIDT as an Electricity density presents the very best metric for short pulse resources. On this routine, the LIDT presented being an Vitality density could be placed on any beam diameter; a person will not have to compute an altered LIDT to adjust for changes in location size.
Destructive uniaxial α-BBO crystal is a superb birefringent crystal, appropriate for the manufacture of polarizer, polarization beam displacer, time delay compensator plate and other birefringent system, especially for UV and significant energy laser.
Their high destruction threshold and great thermal security make them ideal for use in higher-power laser devices, even though their wide transparency selection will allow them to work which has a broad range of laser wavelengths.
In lieu of decompose the SHG polarization into parts Ex and Ez, the light is typically called an extraordinary wave (E'e) by using a refractive index, n'e. Inside the diagram on the right, n'e, which relies on θ, is indicated with the intersection in the conic part illustrated from the here pink ellipse Together with the XZ airplane.
But BBO crystals stand resilient, making certain that techniques proceed to operate with out hiccups, minimizing downtimes and making sure Charge-efficiency Over time.
The team velocity will be the pace of the heartbeat, or even more formally the envelope of the electrical subject. The team index in the same way governs the velocity of the envelope relative towards the speed of light within a vacuum and is also depending on the dispersion of the material.
Each and every side of BBO, from its atomic framework to its wide application spectrum, underscores its pivotal position in modern science and technological know-how.
For beams having a high PRF both of those the common and peak powers needs to be when compared to the equal CW electric power. Furthermore, for extremely clear resources, There's minimal to no drop in the LIDT with raising PRF.
The length on the crystal is a crucial parameter to consider when optimizing the SHG approach for that parameters of particular input pulses. Absent stage-matching and temporal stroll-off outcomes, the SHG output boosts exponentially with crystal length. The goal when choosing an SHG crystal is usually to harmony the crystal duration with the restrictions based on the elemental pulse. Lowering the crystal thickness cuts down effects associated with the two stage-matching bandwidth restrictions and temporal stroll-off, that happen to be specifically linked.
This text dives deep into the advantages and special Houses of BBO crystal and its paramount importance in productive frequency doubling and harmonics era at 266nm.