BBO Crystal Fundamentals Explained
BBO Crystal Fundamentals Explained
Blog Article
This text dives deep into the advantages and special Houses of BBO crystal and its paramount significance in economical frequency doubling and harmonics era at 266nm.
EKSMA Optics uses cookies to provide you with the greatest browsing practical experience. Should you continue on to employ our companies, we will presume that you simply conform to using this sort of cookies.
Regular cleansing and proper storage can help prolong the lifespan of BBO crystals, ensuring their continued contribution to the sphere of optics and photonics.
The section-matching abilities of BBO crystals ought to have Distinctive point out. From the intricate dance of photons, exactly where conversion from one particular wavelength to another is commonly desired, the phase-matching provided by BBO makes sure that Power losses are small.
The seed crystal is just a little BBO crystal with a definite positioning together among its principal axes. The seed crystal is affixed into a turning rod that dips in the thaw surface area space.
Stage matching appreciably improves the conversion performance and might be needed to get hold of sufficient frequency-doubled gentle for applications, but second harmonic generation (SHG) will arise although phase matching just isn't done. The influence of section matching over the output intensity of SHG mild (I2ω) is illustrated in Determine sixteen.
芯飞睿所有的服务和支持都立足于使我们的客人工作的更加高效，更有价值。
When pulse lengths are concerning 1 ns and 1 µs, laser-induced injury can occur either thanks to absorption or a dielectric breakdown (hence, a consumer ought to Check out both CW and pulsed LIDT). Absorption is both resulting from an intrinsic home with the optic or on account of floor irregularities; Therefore LIDT values are only valid for optics Conference or exceeding the floor high quality technical specs provided by a company.
The significant damage threshold of BBO crystals is particularly important in environments where by large-intensity lasers tend to be the norm. Standard materials might falter, degrade, or perhaps crack underneath these intensities.
The Power density of your beam must be calculated in terms of J/cm2. The graph to the right demonstrates why expressing the LIDT as an Vitality density presents the top metric for brief pulse sources. On this routine, the LIDT given being an energy density could be placed on any beam diameter; just one won't must compute an altered LIDT to adjust for adjustments in place dimension.
Alternatively, a small enclosure (with openings for light) could possibly be crafted within the crystal using a steady flow of dry nitrogen of air in to the enclosure. The dry nitrogen/air force requires only to generally be a little bit earlier check here mentioned the environment to maintain the smaller quantity around the crystal dry and clean.
The manufacture of Beta-Barium Borate (BBO) crystals is a complex and meticulous course of action that needs a high degree of precision and abilities. This method, often known as the flux system, begins Along with the preparation of a mix of barium borate and barium fluoride.
BBO crystals also have a higher damage threshold, indicating they could withstand higher amounts of laser electrical power with out suffering hurt. This is particularly essential in apps involving higher-ability lasers. Moreover, BBO crystals have a significant nonlinear coefficient, which enables effective frequency conversion, a important perform in lots of optical devices.
The length in the SHG crystal significantly impacts the spectral width with the reference pulse, or alternatively the bandwidth with the SHG filter.