Everything about BBO Crystal
Everything about BBO Crystal
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This information dives deep into the benefits and exclusive Houses of BBO crystal and its paramount relevance in effective frequency doubling and harmonics generation at 266nm.
The issue that occurs when working with ultrashort pulses for next harmonic technology (SHG) is the fact shorter pulses have greater bandwidths, but The perfect phase-matched situation is often accomplished for only one essential wavelength at a time. Resulting from this, the caliber of the stage match may be appreciably worse towards the spectral edges of wide-bandwidth pulses.
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The Z-axis is parallel on the optical axis with the crystal and also is On top of that called the great axis. The X- and Y-axes are parallel to your optical axis and they are identified as standard axes.
As an alternative to the reference pulse power spectrum comprising an apodization filter, while in the spatial area the filter can be in NA. The angular domain apodization filter having said that, is simply in one-dimension defined from the aircraft k and .
BBO more info crystals have two refractive indices: ne for incredible rays and no for usual rays. The distinction between ne and no will depend on the wavelength of light and also the crystal’s temperature.
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The vast majority of our normal crystals arrive mounted into open up ring holders. You should Notice the letter "H" in the products code which indicates that crystal is supplied mounted.
In quasi-stage matching, the crystal product is “poled�?to acquire up and down domains to counteract the phase-mismatch of the fabric, exactly where the poling period is precise to the wavelengths of conversation.
The energy density within your beam ought to be calculated when it comes to J/cm2. The graph to the appropriate reveals why expressing the LIDT as an Electrical power density offers the most beneficial metric for short pulse resources. In this routine, the LIDT supplied as an energy density could be applied to any beam diameter; a single isn't going to must compute an adjusted LIDT to regulate for adjustments in spot dimensions.
Furthermore, the structural and compositional attributes of BBO offer it with outstanding thermal stability and resistance towards environmental difficulties.
The manufacture of Beta-Barium Borate (BBO) crystals is a posh and meticulous process that needs a superior amount of precision and know-how. This method, often called the flux process, starts with the planning of a mixture of barium borate and barium fluoride.
In the situation of ultrashort pulses the large group velocity mismatch enforces the usage of a shorter crystal, which requires higher optical intensities to get a presented conversion efficiency.
Humidity might cause water absorption about the crystal area, that may degrade its optical efficiency. The standard of the incident gentle, which includes its wavelength, intensity, and polarization, also can have an affect on the overall performance of BBO crystals in various applications.