The 5-Second Trick For BBO Crystal
The 5-Second Trick For BBO Crystal
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The two frequencies' section velocities are equivalent if they contain the exact same refractive index. The refractive indices for these two frequencies are usually not equal, for the reason that all media except vacuum are dispersive. Consequently a fabric's refractive index depends on the light's frequency.
Thorlabs offers a large choice of optics optimized to be used with femtosecond and picosecond laser pulses. You should see underneath To learn more.
Thorlabs expresses LIDT for CW lasers as being a linear electrical power density measured in W/cm. In this particular routine, the LIDT specified to be a linear power density may be placed on any beam diameter; one particular will not need to compute an altered LIDT to regulate for variations in location sizing, as shown because of the graph to the best. Normal linear energy density is usually calculated using the equation beneath.
BBO is of individual importance in the noticeable and much UV. A wide variety of stage-matching apps are attainable, such as the pursuing:
If the crystal surfaces are still “soiled�?after the above mentioned cleansing procedures, the surfaces might need been destroyed. Be sure to Call us for rework with the crystals.
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The length on the crystal is a vital parameter to consider when optimizing the SHG approach for your parameters of particular enter pulses. Absent section-matching and temporal walk-off consequences, the SHG output improves exponentially with crystal length. The goal when finding an SHG crystal is always to stability the crystal duration with the restrictions based on the fundamental pulse. Reducing the crystal thickness cuts down results related to the two section-matching bandwidth constraints and temporal stroll-off, which are straight relevant.
For shopper benefit the crystals may be mounted in an 1" anodized aluminum (Al) mount. The mounted crystals can be further more mounted in a standard one" mirror mount to become angle tuned for section matching (as revealed to the appropriate). H2o-cooled mounts for top ability purposes can be provided upon request.
It is typically get more info needed to focus the incident light from the crystal for SHG programs, given that effective generation of second harmonic light-weight needs higher peak intensities, for example 109 W/cm2. When utilizing femtosecond pulses with reasonable energies from the nanojoule vary, getting the needed peak intensities can have to have smaller focal places.
The performance from the SHG process decreases substantially as the elemental beam diverges from its concentration, Because the pulse Power is dispersed across a bigger beam cross section.
Fluorescence excitation is another realm exactly where the 266nm generation showcases its importance. Fluorescence requires the absorption of light by a material and the following emission of sunshine at a unique wavelength. The 266nm light is highly powerful in fascinating specific fluorescent components, producing them glow brightly and making it possible for for their detection and analyze.
The magnitude with the efficient nonlinear coefficient will depend on the nonlinear tensor parts and over the used period-matching configuration. A significant nonlinearity is essential specifically Should the achievable optical intensities are lower.
On account of its great Attributes BBO crystal provides a number of advantages for different purposes, like NOPA with fsec pulses, harmonics technology (as many as fifth) of Nd:YAG and Nd:YLF lasers, frequency doubling or tripling of femtosecond Ti:Sapphire and dye lasers, OPO at Variety 1 and sort two stage-matching, E/O switching for Pockels cells and a number of other.