The Definitive Guide to a-BBO Crystal
The Definitive Guide to a-BBO Crystal
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The calculation above assumes a uniform beam intensity profile. You will need to now contemplate hotspots while in the beam or other non-uniform depth profiles and about compute a optimum power density.
Unfortunately, it might be very difficult to match the LIDT specification of the optic to the laser. You will discover numerous regimes in which a pulsed laser can destruction an optic and this is predicated around the laser's pulse length. The highlighted columns in the desk beneath define the pertinent pulse lengths for our specified LIDT values.
The Rayleigh array quantifies the space, calculated within the beam waistline, in excess of which the beam diameter is close to continuous. The shorter the Rayleigh vary, the much larger the speed of divergence.
However, to completely benefit from the potential of BBO crystals, it really is crucial to grasp their properties and how to cope with and shop them appropriately. These crystals need thorough handling to avoid damage to their surfaces and should be stored in a very dry, cool place to maintain their optical functionality.
Irrespective of whether it’s in the development of extra successful lasers, the exploration of quantum phenomena, or even the generation of new optical gadgets, BBO crystals will unquestionably keep on to Participate in a pivotal purpose.
They also have a high hurt threshold, permitting them to handle superior-ability laser beams with out degradation. These special properties make BBO crystals a flexible tool in different optical purposes.
The next harmonic frequency wave is created as an extraordinary wave, which can be polarized orthogonal to the elemental-frequency normal wave.
The angular content material of the targeted beam is often visualized by tracing rays in the lens check here to your focal spot. Every ray drawn from the lens to a tightly targeted location (Figure 23) helps make a special angle (ψ) Using the chief ray, along with the variety of angles improves Along with the NA. Given that the number of angles improves outside of the reference NA filter (or angular area apodization filter width), the section-matching with the rays outside of the filter width diminishes hence lessening the SHG conversion performance of People rays.
For the reason that refractive index isn't going to range linearly with frequency in dispersive crystals like β-BBO, it is actually impossible to optimally period match each and every frequency inside the enter pulse's spectral array With all the corresponding second harmonic frequency during the produced pulse.
Typical cleaning and appropriate storage might help prolong the lifespan of BBO crystals, guaranteeing their continued contribution to the field of optics and photonics.
Thorlabs offers a large choice of optics optimized for use with femtosecond and picosecond laser pulses. Remember to see under To find out more.
While in the vast planet of nonlinear optical crystals, BBO crystals jump out as pioneers, specifically in the realm of 266nm technology.
The 2nd harmonic gentle is then polarized parallel for the plane. Angle tuning adjusts θ and is particularly executed by rotating the crystal throughout the Y-axis.
Finally, spectroscopy, the analyze of interactions amongst make a difference and electromagnetic radiation, greatly Added benefits from your 266nm technology. In spectroscopic programs, distinctive wavelengths of light interact differently with resources, supplying a spectrum that could be analyzed to determine the fabric’s Houses or composition.