The best Side of a-BBO Crystal
The best Side of a-BBO Crystal
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Sadly, it might be quite challenging to match the LIDT specification of an optic in your laser. You will discover a number of regimes in which a pulsed laser can problems an optic and this is based within the laser's pulse length. The highlighted columns within the table below define the suitable pulse lengths for our specified LIDT values.
While this guideline offers a typical trend, it is not a quantitative Investigation of LIDT vs wavelength. In CW applications, For example, injury scales far more strongly with absorption inside the coating and substrate, which won't automatically scale perfectly with wavelength.
When just one of these β-BBO Crystals is mounted while in the RSP1 mount, the crystal will probably be centered above the 8-32 (M4) hole during the mount's foundation without the need to have for spacers.
The Strength density of one's beam must be calculated when it comes to J/cm2. The graph to the proper reveals why expressing the LIDT being an Electricity density gives the most beneficial metric for short pulse resources. On this routine, the LIDT supplied being an energy density is often applied to any beam diameter; a single won't ought to compute an modified LIDT to regulate for adjustments in spot sizing.
). This spatial focusing constraint within the SHG system will typically cause the crystal duration always remaining less than the Rayleigh selection of the enter targeted pulse.
Determine 18: The regular and incredible refractive indices of β-BBO vary with frequency and wavelength resulting from a cloth property referred to as dispersion. Dispersion exists in all media other than vacuum.
The Actual physical, chemical, optical, and thermal Qualities from the α -BBO are just like All those with the BBO crystals, however the α -BBO isn't going to show the nonlinear optical Attributes due to central symmetry of its crystal composition.
Knowledge Crystal is akin to appreciating the bedrock of Sophisticated optical technological know-how. At its essence, BBO, or Beta Barium Borate, stands being a nonlinear optical crystal. website The expression “nonlinear�?listed here signifies the exclusive means of your crystal to connect with light inside of a fashion that alters the light’s frequency.
Hence, the next harmonic pulse spectrum, shown on the ideal, incorporates a spectral width roughly the same as The best scenario. Ideally, each and every frequency in the fundamental pulse spectrum can be simultaneously section matched.
As will likely be mentioned underneath, There's a concentrating numerical aperture (NA) limitation to your SHG phase-matching system accurately analogous on the spectral phase matching limitation reviewed inside the former area (
Subsequent, the facility/Strength is either enhanced or decreased plus the optic is exposed at ten new places. This method is repeated until eventually injury is observed. The problems threshold is then assigned for being the best energy/Electricity that the optic can withstand devoid of causing hurt. A histogram such as that under signifies the tests of one BB1-E02 mirror.
The Bodily, chemical, optical, and thermal properties from the α -BBO are comparable to People of the BBO crystals, although the α -BBO doesn't show the nonlinear optical properties as a result of central symmetry of its crystal structure.
Generation of deep ultraviolet radiation at 210 nm by Type-I third harmonic technology is obtained inside of a set of BBO crystals with conversion performance as significant as 36%.