About BBO Crystal
About BBO Crystal
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Each wide-bandwidth pulses and temporal wander-off induce a discount from the conversion efficiency, and worsen the optical quality of the second harmonic pulses. The right crystal thickness really should be selected to attenuate equally effects.
Standard cleaning of BBO crystals is usually proposed to take care of their optical overall performance. This may be completed employing a delicate fabric or lens tissue moistened that has a mild solvent, like isopropyl Liquor.
These properties make BBO crystals hugely fascinating in different purposes, from laser frequency conversion to electro-optic modulation. Their extensive transparency vary enables them to work using a broad range of laser wavelengths, although their higher damage threshold guarantees they could take care of superior-power laser beams devoid of degradation.
Notice that although the nominal depth is below the nominal problems threshold, there might be problems as a result of fluctuations inside the beam electrical power or area intensity (e.g., if a beam profile has “very hot places�?, or as a consequence of isolated defects within a crystal, that are additional sensitive compared to typical crystal material.
BBO is of certain great importance in the noticeable and far UV. A wide variety of period-matching applications are attainable, including the adhering to:
BBO crystals have two refractive indices: ne for amazing rays and no for ordinary rays. The difference between ne and no depends upon the wavelength of sunshine and also the crystal’s temperature.
The Rayleigh vary quantifies the gap, measured within the beam waistline, in excess of which the beam diameter is around regular. The shorter the Rayleigh selection, the larger the rate of divergence.
Nearly all of our normal crystals arrive mounted into open ring holders. Make sure you note the letter "H" in the product code which indicates that crystal is provided mounted.
) to blow off dust and other free contaminants first. If a dry nitrogen line is offered during the lab, an air gun may also be used to blow away dust particles. Blow off the surface area gently. Tend not to blow off the crystal alone from the hand!
BBO crystals could be bought from many different suppliers around the globe. When selecting a supplier, it’s crucial that you contemplate things such as the caliber of the crystals, the supplier’s status, and the level of customer service supplied.
When evaluating an LIDT specified for any pulsed laser towards your laser, it is critical to understand the next:
In frequency conversion, BBO crystals are utilized to alter the colour of laser mild, enabling the manufacture of an array of shades that aren't directly available from accessible laser sources. In electro-optic modulation, They may be utilised to manage the intensity, phase, polarization, or path of the laser beam.
BBO crystals must be taken care of with care to stay away from scratching or detrimental their surfaces. They should be saved inside a dry, neat area and retained far from direct daylight. Frequent cleansing by using a soft cloth or air blower is recommended to maintain their optical overall performance. When handling BBO crystals, it’s vital that you use gloves to circumvent oils from your pores more info and skin from contaminating the crystal floor.
Any imperfections inside the reducing system could most likely influence the optical Homes with the crystals.