The calculation previously mentioned assumes a uniform beam depth profile. You have to now take into consideration hotspots from the beam or other non-uniform depth profiles and approximately work out a greatest electricity density.
The length on the SHG crystal considerably impacts the spectral width of the reference pulse, or alternatively the bandwidth in the SHG filter.
The ability of BBO crystals to change the frequency of light has made them indispensable in laser technological know-how. They have enabled the manufacture of a wide spectrum of light colours, far beyond what exactly is immediately accessible from obtainable laser sources.
Nonetheless, it’s imperative that you note that while BBO crystals can cope with substantial energy, they should however be utilized inside their specified energy array to circumvent probable hurt and be certain ideal efficiency.
The 266nm technology ensures that these interactions are finely tuned, making it possible for scientists to glean insights with enhanced precision. Regardless of whether it’s in studying sophisticated molecules, identifying the Houses of latest elements, or in environmental monitoring, the BBO crystal’s ability to deliver 266nm light amplifies the depth and accuracy of spectroscopic experiments.
Now Examine the utmost power density to that that is specified since the LIDT for that optic. Should the optic was examined at a wavelength besides your functioning wavelength, the problems threshold needs to be scaled appropriately.
Figure 18: The standard and extraordinary refractive indices of β-BBO fluctuate with frequency and wavelength due to a fabric residence called dispersion. Dispersion exists in all media other than vacuum.
Some suppliers' SHG crystals, together with Thorlabs', provide in close proximity to-period-matched disorders for Usually incident input gentle for just a specified fundamental frequency. These producers polish the faces on the SHG crystals these which the angle in between the Typically incident mild along with the optic axis would be the period-matched angle for the specified frequency.
Now Assess the utmost Electrical power density to that that's specified because the LIDT for that optic. In the event the optic was examined at a wavelength in addition to your running wavelength, the destruction threshold need to be scaled properly [3].
Standard cleaning and suitable storage may help increase the lifespan of BBO crystals, making sure their ongoing contribution to the sphere of optics and photonics.
A: The wide transparency assortment delivers flexibility, allowing BBO crystals for use throughout a various range of wavelengths and purposes.
When comparing an LIDT specified to get a pulsed laser to the laser, it is vital to know the following:
The temporal stroll-off is usually get more info viewed as intense if the temporal lag exceeds the duration of the fundamental pulse. Serious walk-off may end up in temporal lag that irreparably improves the length in the output 2nd harmonic pulse.
The problem that occurs when applying ultrashort pulses for next harmonic technology (SHG) is the fact that shorter pulses have more substantial bandwidths, but The best section-matched ailment can be accomplished For less than an individual basic wavelength at a time. On account of this, the caliber of the period match is often appreciably even worse in the direction of the spectral edges of broad-bandwidth pulses.