The Definitive Guide to a-BBO Crystal
The Definitive Guide to a-BBO Crystal
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While in the sophisticated tapestry of photonics, the 266nm generation, backed via the prowess of BBO, emerges like a thread of paramount importance.
Hello, thank you for getting in contact with Thorlabs. The wavelength ranges of the antireflective coatings on these β-BBO crystals align Together with the respective wavelength bands that these crystals are optimized for. Requests for customizations can be created by reaching out to us at techsupport@thorlabs.com
In quasi-phase matching, the crystal content is “poled�?to own up and down domains to counteract the phase-mismatch of the material, in which the poling period of time is distinct to your wavelengths of conversation.
BBO crystals may be cleaned utilizing a comfortable fabric or air blower. For stubborn stains, a delicate detergent or isopropyl Liquor may be used. It’s imperative that you avoid making use of abrasive supplies that might scratch the crystal’s surface area. When cleaning BBO crystals, it’s crucial to use a delicate, round motion in order to avoid scratching the surface area.
The efficiency of your SHG process decreases considerably as the fundamental beam diverges from its concentrate, Considering that the pulse Electricity is distributed across a bigger beam cross area.
In some cases, the mismatch is often small. One example is, when a β-BBO crystal is accustomed to frequency double 1550 nm light-weight and provide 775 nm gentle, the group velocity mismatch is just a few femtoseconds for every millimeter.
As opposed to decompose the SHG polarization into components Ex and Ez, the light is often described as a unprecedented wave (E'e) with a refractive index, n'e. During the diagram on the proper, n'e, which relies on θ, is indicated from the intersection from the conic area illustrated because of the crimson ellipse With all the XZ aircraft.
Assuming a crystal of a supplied thickness, it is feasible to determine a click here reference pulse which has a spectral array which is the maximum that may be sufficiently phase matched. This spectral bandwidth limitation can also be considered regarding an SHG spectral filter whose passband depends on equally the precise crystal and the heart beat's center frequency. Frequencies outside of this filter’s passband will be turned down from undergoing the SHG process.
Also, spectroscopy, a way that’s elementary in examining and comprehension the Houses of assorted substances, reaps the rewards of BBO’s abilities. Spectroscopy depends to the conversation among mild and make a difference to derive insights a few compound’s composition, framework, and also other Homes.
Equally wide-bandwidth pulses and temporal wander-off cause a reduction while in the conversion effectiveness, together with worsen the optical good quality of the next harmonic pulses. The suitable crystal thickness really should be chosen to minimize equally consequences.
For beams with a superior PRF both equally the common and peak powers should be in comparison to the equal CW electrical power. On top of that, for very clear resources, There's minimal to no drop during the LIDT with rising PRF.
When laser light-weight is focused to the place, the diameter in the beam waist is the focal location measurement, and the rate at which The sunshine diverges through the beam waistline is associated with the Rayleigh vary (zR).
This informative article dives deep into the benefits and unique Qualities of BBO crystal and its paramount worth in efficient frequency doubling and harmonics generation at 266nm.