Everything about BBO Crystal
Everything about BBO Crystal
Blog Article
This informative article dives deep into the benefits and special Qualities of BBO crystal and its paramount value in economical frequency doubling and harmonics technology at 266nm.
With correct treatment and routine maintenance, BBO crystals can past for many years. Common cleansing and suitable storage will help extend the lifespan with the crystals. In addition, utilizing the crystals within just their specified functioning parameters may enable protect against untimely degradation.
This kind of capability is invaluable in scenarios wherever a certain light-weight frequency is required, although the supply doesn’t Normally provide it. By using BBO’s Houses, researchers and engineers can successfully “tune�?their gentle sources to wished-for frequencies.
Figure 23: This diagram illustrates a beam's focal location inside of a uniaxial birefringent materials. Straight traces, symbolizing rays, are drawn through the Centre on the beam midsection. Since the beam diverges from the beam waistline, the Vitality while in the beam is dispersed above a bigger cross sectional space.
BBO crystals may be cleaned using a delicate fabric or air blower. For stubborn stains, a mild detergent or isopropyl alcohol may be used. It’s crucial that you stay away from utilizing abrasive supplies that could scratch the crystal’s floor. When cleansing BBO crystals, it’s important to use a delicate, round motion to avoid scratching the floor.
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Now compare the most power density to that that's specified as being the LIDT for the optic. If the optic was tested at a wavelength other than your functioning wavelength, the harm threshold need to be scaled properly.
Presented these applications, it’s obvious why BBO, with its inherent capacity to successfully generate the 266nm wavelength, is so very prized. The crystal’s distinctive nonlinear optical Attributes help the conversion of other wavelengths to the coveted 266nm light, making sure that scientists and industries have access to this critical Device.
The spatial wander-off angle is dependent upon the dimensions on the beam and also the crystal size. Even though the angle is often considerable, it is generally small, commonly within the buy of ten mrad, and may be neglected.
Other period matching disorders can also be doable. Crucial Form-II section matching employs an oe-o or eo-e for positive and damaging uniaxial crystals. Non-crucial period matching uses crystal temperature to accomplish stage matching in lieu of angular tuning.
Pumped with the fourth harmonic of the Nd:YAG laser (at 266nm), a tunable OPO with sign wavelength vary concerning 422nm and 477nm has long been noticed by angle-tuning a sort I BBO crystal. Pumped by a 1mJ, 80fs Dye laser at 615nm, the OPA with two BBO crystals yields more than fiftyµJ (utmost one hundred thirtyµJ),
What exactly are BBO Crystals? BBO crystals can be a form of nonlinear optical crystal noted for their extensive transparency array, superior destruction threshold, and exceptional thermal and chemical balance.
The 266nm era refers back to the production of ultraviolet light-weight that has click here a wavelength of 266 nanometers.
This decreases the powerful conversation dimensions in addition to lowers the conversion success. For example, BBO crystals have an angular walk-off of regarding 38 mrad for SHG at 1064 nm wavelength, that has to carry out with six occasions more substantial than KDP crystals.