How Much You Need To Expect You'll Pay For A Good BBO Crystal
How Much You Need To Expect You'll Pay For A Good BBO Crystal
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Both of those broad-bandwidth pulses and temporal stroll-off bring about a reduction within the conversion performance, and also worsen the optical high quality of the next harmonic pulses. The right crystal thickness ought to be picked out to attenuate both equally results.
Hi there, thanks 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 produced by reaching out to us at techsupport@thorlabs.com
From the ray-product perspective, the propagation course defines the orientation of the central (Main) ray in Figure 23. The SHG procedure is affected from the selection of angles more than which incident light-weight propagates, mainly because mild that isn't parallel for the chief ray has reduced period-matching relative on the Main ray.
To be able to use the required CW injury threshold of an optic, it's important to know the subsequent:
Second harmonic technology (SHG): We make the most of SHG to measure our things�?nonlinear conversion effectiveness and stage-matching angle for a supplied input wavelength. We assurance that our merchandise fulfil the requirements for SHG apps.
). This spatial focusing constraint to the SHG procedure will commonly cause the crystal length always remaining lower than the Rayleigh variety of the input focused pulse.
Now Evaluate the most electrical power density to that BBO Crystal which happens to be specified as being the LIDT with the optic. In the event the optic was examined at a wavelength other than your working wavelength, the damage threshold should be scaled appropriately.
When a single of these β-BBO Crystals is mounted during the RSP1 mount, the crystal are going to be centered above the eight-32 (M4) gap during the mount's base without the have to have for spacers.
The high damage threshold of BBO crystals is especially critical in environments wherever higher-intensity lasers are classified as the norm. Regular products could possibly falter, degrade, or maybe crack less than this kind of intensities.
It is usually required to focus the incident light-weight inside the crystal for SHG applications, since productive generation of 2nd harmonic gentle involves significant peak intensities, such as 109 W/cm2. When employing femtosecond pulses with average energies while in the nanojoule range, getting the essential peak intensities can require smaller focal places.
Pumped via the fourth harmonic of the Nd:YAG laser (at 266nm), a tunable OPO with sign wavelength range amongst 422nm and 477nm continues to be 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 over 50µJ (maximum a hundred thirtyµJ),
Many different Houses of the nonlinear crystal could be essential for an software e.g. in nonlinear frequency conversion:
The 266nm era refers back to the production of ultraviolet gentle by using a wavelength of 266 nanometers.
This makes them remarkably tough and resilient, further more boosting their suitability for demanding optical purposes.