The 2-Minute Rule for a-BBO Crystal
The 2-Minute Rule for a-BBO Crystal
Blog Article
This can be a preview of subscription information, log in via an institution to examine access. Obtain this text
A2: Yes, prolonged publicity to humidity can degrade the optical functionality of BBO crystals. Humidity can lead to drinking water absorption within the crystal floor, which often can have an impact on its optical Qualities.
While this rule of thumb delivers a common craze, It's not at all a quantitative Examination of LIDT vs wavelength. In CW programs, By way of example, destruction scales a lot more strongly with absorption while in the coating and substrate, which won't always scale perfectly with wavelength.
Nevertheless, to totally employ the opportunity of BBO crystals, it truly is very important to comprehend their Attributes and the way to deal with and retail store them correctly. These crystals call for thorough managing to stop harm to their surfaces and should be saved in a dry, interesting put to take care of their optical effectiveness.
Quite a few factors can have an effect on the effectiveness of BBO crystals. These contain temperature, humidity, and the quality of the incident mild. Correct managing and storage may help retain the crystal’s functionality. Temperature can have an impact on the phase-matching circumstances of BBO crystals, which in turn has an effect on their performance in frequency conversion apps.
Now Examine the most energy density to that and that is specified because the LIDT with the optic. In the event the optic was tested in a wavelength in addition to your functioning wavelength, the problems threshold needs to be scaled correctly.
Even though the above treatment delivers a very good rule of thumb for LIDT here values, please Get in touch with Tech Help In the event your wavelength is different from the required LIDT wavelength. In the event your ability density is below the modified LIDT in the optic, then the optic should work in your application.
It is usually important to concentration the incident gentle within the crystal for SHG programs, since efficient technology of 2nd harmonic gentle needs substantial peak intensities, for instance 109 W/cm2. When employing femtosecond pulses with moderate energies while in the nanojoule assortment, obtaining the expected peak intensities can need compact focal spots.
This assets sets it aside from linear optical products that don’t alter the frequency of light passing via them. This kind of distinguishing attribute kinds the foundation for a myriad of apps that BBO can serve.
It’s like taking an individual Take note and splitting it into two harmonious tones. This method can be essential in several Innovative optical experiments and systems.
As will probably be discussed underneath, There exists a focusing numerical aperture (NA) limitation into the SHG section-matching method just analogous to your spectral section matching limitation talked about in the past segment (
Subsequent, the facility/Power is possibly elevated or lessened as well as the optic is uncovered at 10 new spots. This method is repeated until eventually injury is noticed. The injury threshold is then assigned to generally be the very best power/Strength which the optic can stand up to without the need of leading to destruction. A histogram including that down below represents the screening of 1 BB1-E02 mirror.
When laser light is concentrated to your place, the diameter from the beam midsection may be the focal spot size, and the speed at which The sunshine diverges from your beam waist is associated with the Rayleigh range (zR).
The spectrally narrowed SHG pulse spectrum is said being apodized, because an influence of the elemental pulse exceeding the maximum input bandwidth limit would be the elimination of the very best and cheapest frequencies with the SHG pulse spectrum.