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Hi, thank you for contacting Thorlabs. The wavelength ranges from the antireflective coatings on these β-BBO crystals align with the respective wavelength bands that these crystals are optimized for. Requests for customizations is often produced by achieving out to us at [email protected]
The energy in both waves propagates in directions based on their Poynting vectors. Snell's legislation won't explain the way of Electricity circulation, but it really can be used to compute the course on the k-vector in the crystal.
Borates for example LBO and BBO also get the job done perfectly in broadly tunable optical parametric oscillators and optical parametric chirped-pulse amplification.
As opposed to the reference pulse electrical power spectrum comprising an apodization filter, inside the spatial domain the filter would be in NA. The angular domain apodization filter on the other hand, is just in one-dimension outlined through the airplane k and .
In the case of Sort-I period matching and β-BBO crystals, the basic light-weight propagates as a rare wave within the crystal, while the 2nd harmonic light-weight propagates as a normal wave.
Figure 22: The diagram at the very best demonstrates two pulses with different Heart frequencies incident on a fabric. The group velocity hold off involving the pulses once they enter the fabric is zero.
A lot of our standard crystals come mounted into open up ring holders. You should note the letter "H" inside the product or service code which indicates that crystal is equipped mounted.
We also layer our objects with anti-reflection levels to lower representation losses with the crystal surfaces.
It is typically essential to concentration the incident light-weight inside the crystal click here for SHG apps, considering that effective technology of 2nd harmonic gentle involves higher peak intensities, which include 109 W/cm2. When applying femtosecond pulses with moderate energies during the nanojoule selection, obtaining the expected peak intensities can have to have little focal spots.
These crystals are one of a kind due to their capability to alter the frequency of light passing by way of them, a assets that is very sought after in numerous fields for instance laser technology and quantum physics. The versatility of BBO crystals tends to make them a crucial ingredient in many Sophisticated optical programs.
Having said that, in many instances, the main difference in the elemental and next harmonic pulse velocities can result in a single pulse to noticeably lag one other.
In the case of ultrashort pulses the significant group velocity mismatch enforces the use of a shorter crystal, which demands substantial optical intensities for a given conversion performance.
No matter whether you’re a researcher, a laser system designer, or an enthusiast, we hope this information has answered your questions on BBO crystals.