Fascination About a-BBO Crystal
Fascination About a-BBO Crystal
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The crystal axis is c. The Main ray is parallel into the route utilized to evaluate the tuning angle (θ), which is optimized during period matching. Conversion effectiveness is optimized for rays parallel towards the Main ray and worse for rays at larger angles (ψ) for the chief ray.
The team velocities of the fundamental and second harmonic pulses are also unique, even if phase-matched, and the magnitude in the team velocity mismatch is determined by the crystal Houses and also the optical frequencies inside the pulses.
Hi, thank you for getting in touch with Thorlabs. The wavelength ranges from the antireflective coatings on these β-BBO crystals align While using the respective wavelength bands that these crystals are optimized for. Requests for customizations could be produced by achieving out to us at techsupport@thorlabs.com
However, to completely benefit from the prospective of BBO crystals, it is actually crucial to understand their Qualities and the way to manage and retail outlet them adequately. These crystals require cautious dealing with to prevent damage to their surfaces and may be stored in a very dry, neat place to keep up their optical overall performance.
A number of components can impact the efficiency of BBO crystals. These include things like temperature, humidity, and the caliber of the incident light-weight. Proper handling and storage can help manage the crystal’s overall performance. Temperature can impact the section-matching disorders of BBO crystals, which consequently affects their effectiveness in frequency conversion applications.
Now Evaluate the utmost ability density to that that is specified as the LIDT for the optic. When the optic was examined in a wavelength aside from your running wavelength, the problems threshold must be scaled correctly.
Figure 18: The everyday and extraordinary refractive indices of β-BBO differ with frequency and wavelength resulting from a cloth property known as dispersion. Dispersion exists in all media besides vacuum.
It is typically essential to concentrate the incident gentle within the crystal for SHG applications, since economical era of next harmonic light-weight demands substantial peak intensities, for example 109 W/cm2. When making use of femtosecond pulses with average energies from the nanojoule range, getting the expected peak intensities can have to have modest focal spots.
When pulse lengths are among 1 ns and 1 µs, laser-induced harm can take place possibly as a result of absorption or maybe a dielectric breakdown (thus, a consumer have to Look at each CW and pulsed LIDT). Absorption is either as a result of an intrinsic home of your optic or resulting from area irregularities; thus LIDT values are only legitimate for optics Conference or exceeding the floor excellent requirements provided by a manufacturer.
The temporal wander-off of your slower pulse with regard into the faster can be a considerable fraction of the heart beat duration. That is illustrated in Figure 22.
The team velocity and the stage velocity are usually not equal, indicating the sine wave of your copyright as well as the envelope of the heart beat move by way of optical media at distinctive speeds.
When picking an SHG crystal, the heart beat period in the laser supply should be taken into account. A mismatch between the length and crystal thickness will result in SHG pulses for a longer period in time and narrower in spectral content than achievable below great problems.
When more info an enter pulse's spectral vary is equivalent to or narrower when compared to the reference pulse, the created 2nd harmonic pulse features a duration that is shorter by an element of one/√2 along with a spectral width that is broader by a factor of √2.
This is especially important in industries like semiconductors and micro-electromechanical devices (MEMS), exactly where even a minimal mistake can render a component ineffective or cause sizeable losses. With BBO’s 266nm generation, industries can accomplish greater precision and trustworthiness in their fabrication processes, driving innovation and product or service good quality to new heights.