The calculation above assumes a uniform beam depth profile. You will need to now take into account hotspots within the beam or other non-uniform intensity profiles and around work out a utmost electricity density.

The group velocities of the fundamental and next harmonic pulses are distinctive, even if phase-matched, along with the magnitude of your team velocity mismatch is dependent upon the crystal properties along with the optical frequencies inside the pulses.

The flexibility of BBO crystals to change the frequency of light has designed them indispensable in laser technologies. They've got enabled the production of a wide spectrum of light colours, far further than what is straight obtainable from obtainable laser sources.

The section matching angle can be altered by rotating the crystal across the y axis. An adjustment that is often in a number of degrees can possibly enhance the efficiency of your crystal in the setup or match An additional elementary frequency in the crystal's running array.

The Strength density of one's beam really should be calculated with regard to J/cm2. The graph to the best shows why expressing the LIDT as an Power density provides the most beneficial metric for short pulse resources. In this particular routine, the LIDT presented as an Power density could be applied to any beam diameter; a single will not have to compute an adjusted LIDT to regulate for modifications in location dimension.

Now Evaluate the most energy density to that that's specified as being the LIDT with the optic. If the optic was tested in a wavelength besides your functioning wavelength, the harm threshold needs to be scaled properly.

Even though the above mentioned treatment presents a good rule of thumb for LIDT values, make sure you Make contact with Tech Help In case your wavelength differs from the required LIDT wavelength. If the electricity density is less than the modified LIDT from the optic, then the optic should really get the job done in your application. 

It is typically important to aim the incident gentle while in the crystal for SHG applications, since efficient era of 2nd harmonic light-weight necessitates significant peak intensities, for example 109 W/cm2. When making use of femtosecond pulses with average energies from the nanojoule assortment, obtaining the demanded peak intensities can call for smaller focal places.

Now Evaluate the maximum Electrical power density to that and that is specified because the LIDT for that optic. In the event the optic was analyzed at a wavelength other than your running wavelength, the injury threshold have to be scaled properly [3].

Common cleansing and suitable storage can assist lengthen the lifespan of BBO crystals, making certain their continued contribution to the field of optics and photonics.

The team velocity and also the stage velocity usually are not equivalent, meaning the sine wave on the provider and also the envelope of the heart beat move by means of optical media at distinctive speeds.

Since the dynamics of this method are hugely topic to experimental parameters, it is difficult to arbitrarily predict the exact results on the second harmonic pulse. These consequences can include things like back conversion, in which next harmonic mild is transformed back again to fundamental light-weight, and spectral narrowing in the SHG pulse.

The 266nm technology get more info refers to the manufacture of ultraviolet light using a wavelength of 266 nanometers.

Pulsed lasers with higher pulse repetition frequencies (PRF) could behave likewise to CW beams. Sadly, this is highly depending on aspects such as absorption and thermal diffusivity, so there is absolutely no responsible process for identifying when a large PRF laser will hurt an optic as a consequence of thermal outcomes.