BBO Crystal - An Overview
BBO Crystal - An Overview
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A: Certainly, BBO crystals show outstanding thermal stability, earning them appropriate for programs with varying temperatures.
Hello there, thanks for getting in touch with Thorlabs. The wavelength ranges of your antireflective coatings on these β-BBO crystals align with the respective wavelength bands that these crystals are optimized for. Requests for customizations is often made by reaching out to us at techsupport@thorlabs.com
These Homes make BBO crystals hugely desirable in numerous purposes, from laser frequency conversion to electro-optic modulation. Their large transparency array will allow them to operate having a broad range of laser wavelengths, even though their high harm threshold makes certain they might cope with significant-electric power laser beams with out degradation.
The period-matching capabilities of BBO crystals have earned Exclusive point out. From the intricate dance of photons, where conversion from a single wavelength to a different is often preferred, the period-matching supplied by BBO ensures that Electricity losses are minimal.
Broad openness wide range: BBO crystals have a broad openness array from 189 nm to 3500 nm, masking ultraviolet, noticeable, and around-infrared locations. This permits BBO crystals for use for varied laser resources with several wavelengths.
Assuming a crystal of a specified thickness, it is achievable to define a reference pulse that has a spectral vary that is definitely the maximum that could be sufficiently stage matched. This spectral bandwidth limitation will also be thought of with regards to an SHG spectral filter whose passband will depend on equally the specific crystal and the heart beat's center frequency. Frequencies outside of this filter’s passband will be turned down from undergoing the SHG approach.
When laser light is focused to a place, the diameter from the more info beam waistline is definitely the focal place dimension, and the speed at which the light diverges through the beam waist is associated with the Rayleigh range (zR).
This distinction triggers period mismatch concerning many light polarization elements when propagating through a BBO crystal. Adjusting the angle concerning the beam and crystal axes can compensate for this phase mismatch.
We also layer our objects with anti-reflection levels to reduce illustration losses on the crystal surfaces.
As an example, anti-reflective coatings is often placed on cut down gentle reduction as a consequence of reflection, when protective coatings can be utilized to increase the crystal’s resistance to environmental components. Customization permits best overall performance in precise apps.
The effectiveness from the SHG approach decreases significantly as the elemental beam diverges from its aim, since the pulse energy is dispersed across a bigger beam cross segment.
The posture from the green curve will depend on θ. In this case, the angle θ has actually been tuned to deliver a refractive index for 515 nm light-weight that matches the refractive index for 1030 nm mild. This tuning angle is hence optimized for Sort-I SHG stage matching and also a elementary-frequency input beam of 1030 nm.
The magnitude of your powerful nonlinear coefficient relies on the nonlinear tensor components and to the used stage-matching configuration. A superior nonlinearity is vital especially If your achievable optical intensities are reduced.
This decreases the effective communication dimension and in addition lowers the conversion efficiency. One example is, BBO crystals have an angular wander-off of concerning 38 mrad for SHG at 1064 nm wavelength, that has to perform with six instances more substantial than KDP crystals.