Top a-BBO Crystal Secrets
Top a-BBO Crystal Secrets
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The calculation higher than assumes a uniform beam depth profile. You have to now look at hotspots within the beam or other non-uniform intensity profiles and approximately compute a utmost power density.
In addition to their use in laser frequency conversion, BBO crystals have found programs in electro-optic modulation and quantum optics experiments.
Any scratches can degrade the optical overall performance in the crystal and most likely bring about harm underneath high laser power. For stubborn stains, an answer of delicate detergent or isopropyl Alcoholic beverages is usually gently applied to the crystal surface area after which rinsed off with distilled water.
When just one of those β-BBO Crystals is mounted while in the RSP1 mount, the crystal is going to be centered in excess of the 8-32 (M4) hole from the mount's foundation with no want for spacers.
We use Numerical Aperture (NA) to describe the extent of the angular content material. Ideally, the fundamental laser light-weight might be collimated through the entire crystal, considering the fact that collimated mild resembles a group of rays aligned to exactly the same way using an NA of zero.
Unfavorable uniaxial α-BBO crystal is a wonderful birefringent crystal, appropriate for the manufacture of polarizer, polarization beam displacer, time hold off compensator plate together with other birefringent unit, specifically for UV and substantial power laser.
Determine 18: The ordinary and amazing refractive indices of β-BBO range with frequency and wavelength as a consequence of a cloth property termed dispersion. Dispersion exists in all media other than vacuum.
This kind of ability is priceless in predicaments where a specific light frequency is necessary, though the resource doesn’t In a natural way give it. By making use of BBO’s Homes, researchers and engineers can efficiently “tune�?their mild sources to desired frequencies.
Pumped through the fourth harmonic of the Nd:YAG laser (at 266nm), a tunable OPO with sign wavelength range among 422nm and 477nm has long been observed by angle-tuning a type I BBO crystal. Pumped by a 1mJ, 80fs Dye laser at 615nm, the OPA with two BBO crystals yields a lot more than 50µJ (utmost one hundred thirtyµJ),
A5: Certainly, BBO crystals have superb thermal security and might manage their properties at area temperature. Therefore they may be used in an array of environments devoid of demanding Distinctive temperature Manage.
Just about every facet of BBO, from its atomic framework to its wide application spectrum, underscores its pivotal job in modern day science and technological know-how.
This high-quality-tuning website capacity means that BBO crystals can cater to the two generic and remarkably specialised needs with equivalent finesse.
When laser light-weight is concentrated to your place, the diameter from the beam waist is definitely the focal location measurement, and the rate at which The sunshine diverges with the beam waistline is associated with the Rayleigh range (zR).
The spectrally narrowed SHG pulse spectrum is claimed to be apodized, given that an impact of the fundamental pulse exceeding the utmost input bandwidth Restrict is definitely the removing of the highest and most affordable frequencies through the SHG pulse spectrum.