Examine This Report on a-BBO Crystal
Examine This Report on a-BBO Crystal
Blog Article
The calculation previously mentioned assumes a uniform beam depth profile. You should now contemplate hotspots from the beam or other non-uniform depth profiles and roughly determine a optimum electric power density.
Besides their use in laser frequency conversion, BBO crystals have found apps in electro-optic modulation and quantum optics experiments.
Figure 22: The diagram at the top shows two pulses with unique center frequencies incident on a cloth. The group velocity hold off involving the pulses when they enter the fabric is zero.
Rather than the reference pulse power spectrum comprising an apodization filter, from the spatial domain the filter would be in NA. The angular area apodization filter even so, is only in a single-dimension defined through the airplane k and .
Any contamination can degrade the optical functionality on the crystal and probably cause damage under significant laser electric power. When storing BBO crystals, they must be positioned within a protective case to circumvent physical damage and dirt accumulation.
The efficiency with the SHG course of action decreases considerably as the elemental beam diverges from its emphasis, since the pulse energy is distributed across a bigger beam cross part.
When the exam success are only representative of one coating operate, Thorlabs specifies injury threshold values that account for coating variances.
This precision permits the fabrication of intricate structures and designs on many supplies, from metals to biological tissues. It’s not pretty much generating smaller sized objects; it’s about creating them using an unparalleled level of depth.
BBO crystals really should be managed with care to stay away from scratching or harmful their surfaces. They should be saved in the dry, great place and held away from direct daylight. Typical cleansing having a smooth cloth or air blower is recommended to keep up their optical efficiency. When managing BBO crystals, it’s vital that you use gloves to forestall oils from the skin from contaminating the crystal surface.
With right care and managing, BBO crystals can final for quite some time. Nonetheless, their lifespan is often shortened by aspects including superior temperature, humidity, and physical injury. BBO crystals are sturdy and sturdy, but like any optical component, they could degrade after some time Otherwise properly cared for.
The Uncooked elements, commonly a mix of barium carbonate and boric acid, are positioned within a platinum crucible and heated right up until they melt. The temperature is then steadily reduced, letting the BBO crystal to variety in excess of numerous months. The crystal is then extracted, Minimize into the desired shape, and polished to obtain a substantial-high quality optical area.
This is actually the so-called oo-e arrangement, as The 2 photons from the fundamental are polarization-oriented together the standard axis and the second harmonic photon's polarization is in the amazing plane.
The 266nm era refers to the production of ultraviolet light-weight here by using a wavelength of 266 nanometers.
This is particularly important in biological and medical investigate wherever precise compounds or cells are tagged with fluorescent markers. The 266nm mild can excite these markers, producing them stand out Evidently in opposition to a track record, thus facilitating specific Examination.