What Does BBO Crystal Mean?
What Does BBO Crystal Mean?
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This efficiency is significant, specially when 1 considers the generation from the 266nm wavelength, the place even small inefficiencies can cause considerable Electricity losses.
BBO crystals are developed using the flux technique, a procedure that requires melting Uncooked elements at significant temperatures. The molten materials is then bit by bit cooled to form a crystal. This method calls for specific Charge of temperature and cooling rate to ensure the crystal’s excellent and integrity.
The Electrical power in both waves propagates in Instructions based on their Poynting vectors. Snell's law does not describe the route of energy flow, but it can be employed to work out the direction with the k-vector while in the crystal.
Thorlabs expresses LIDT for CW lasers for a linear power density measured in W/cm. In this particular routine, the LIDT supplied to be a linear electric power density can be placed on any beam diameter; one doesn't ought to compute an altered LIDT to adjust for alterations in spot dimension, as demonstrated because of the graph to the best. Regular linear energy density can be calculated using the equation beneath.
Significant-top quality crystals may have less defects and produce greater overall performance, although a dependable supplier will stand powering their items and supply support when needed. Excellent customer service also can make the getting approach smoother and much more fulfilling.
They show very good homogeneity more than significant volumes and have a higher injury threshold, but are hygroscopic and possess a reduced nonlinearity.
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Specified these programs, it’s evident why BBO, with its inherent capacity to successfully create the 266nm wavelength, is so hugely prized. The crystal’s distinctive nonlinear optical Attributes empower the conversion of other wavelengths in to the coveted 266nm light-weight, guaranteeing that researchers and industries have use of this essential Software.
A5: Of course, BBO crystals have superb thermal security and may manage their Houses at home temperature. Therefore they can be Employed in a wide range of environments with out demanding Specific temperature Handle.
Smaller acceptance angle: BBO crystals have a small acceptance angle that limitations the input light-weight beam’s light beam divergence and prime manner good website quality for helpful regularity conversion.
We use Numerical Aperture (NA) to describe the extent of the angular content. Preferably, the elemental laser gentle might be collimated all through the crystal, due to the fact collimated gentle resembles a bunch of rays aligned to precisely the same path with the NA of zero.
The spectrally narrowed SHG pulse spectrum is said to be apodized, due to the fact an impact of the basic pulse exceeding the maximum enter bandwidth Restrict is definitely the elimination of the highest and cheapest frequencies in the SHG pulse spectrum.
The 266nm era refers back to the production of ultraviolet mild by using a wavelength of 266 nanometers.
Considering that the refractive index will not range linearly with frequency in dispersive crystals like β-BBO, it's not possible to optimally period match each individual frequency while in the enter pulse's spectral assortment Along with the corresponding next harmonic frequency within the generated pulse.