The Single Best Strategy To Use For a-BBO Crystal
The Single Best Strategy To Use For a-BBO Crystal
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Frequent cleaning and good storage will help lengthen the lifespan of BBO crystals. It’s also important to keep away from exposing the crystals to ailments outside their specified functioning variety, as this can result in lasting hurt.
β-BBO Crystal—a widely applied nonlinear crystal for frequency conversion while in the ultraviolet, obvious and in the vicinity of-infrared
A second worry would be that the team velocity mismatch involving the second harmonic and basic-frequency pulses will lead to one pulse lagging one other as The 2 propagate. This is called temporal wander-off and may come about even underneath optimum phase-matched disorders.
This efficiency is important, specially when just one considers the era of the 266nm wavelength, the place even minor inefficiencies can cause sizeable Electrical power losses.
BBO crystals may be cleaned using a gentle fabric or air blower. For stubborn stains, a moderate detergent or isopropyl Alcoholic beverages can be employed. It’s crucial to stay away from making use of abrasive resources that can scratch the crystal’s surface area. When cleaning BBO crystals, it’s imperative that you use a mild, round movement to avoid scratching the surface.
As the 2nd harmonic mild propagates, its energy flows in a distinct course than that of the fundamental light-weight.
The second harmonic frequency wave is generated as a rare wave, which is polarized orthogonal to the elemental-frequency standard wave.
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For instance, look at a elementary pulse propagating over a offered crystal thickness. If the temporal stroll-off is larger than the duration of the basic pulse, this pulse will even have a spectral bandwidth that greatly exceeds the spectral width in the reference pulse. A standard rule for restricting the harmful consequences related more info to both of those Bodily outcomes is to pick a crystal thickness that boundaries the elemental and next harmonic temporal wander-off to not more than the duration of the fundamental pulse.
With right treatment and dealing with, BBO crystals can previous for many years. Nevertheless, their lifespan can be shortened by factors for example large temperature, humidity, and Actual physical hurt. BBO crystals are sturdy and durable, but like any optical component, they're able to degrade after some time Otherwise appropriately cared for.
Thorlabs provides a wide selection of optics optimized for use with femtosecond and picosecond laser pulses. Make sure you see beneath To find out more.
When comparing an LIDT specified for just a pulsed laser towards your laser, it is critical to be aware of the subsequent:
A advisable guideline for concentrating femtosecond laser pulses right into a nonlinear crystal is to take care of a Rayleigh assortment that may be no less than numerous occasions more time compared to duration in the SHG crystal. This minimizes the prospect of damaging the crystal, as well as reduces the detrimental results of spatial period mismatch and spatial (Poynting vector) walk-off.
This article dives deep into the advantages and special Qualities of BBO crystal and its paramount importance in efficient frequency doubling and harmonics era at 266nm.