a-BBO Crystal Options
a-BBO Crystal Options
Blog Article
Higher-precision laser microfabrication is a method the place materials are processed and modified over a microscopic scale. This method needs a laser resource that will make very focused and specific beams of light. The 266nm wavelength is especially appropriate for this because of its short wavelength, which makes sure that the laser beam can be targeted to a very modest place dimensions.
Regrettably, it can be quite challenging to compare the LIDT specification of an optic to your laser. There are several regimes in which a pulsed laser can harm an optic which relies within the laser's pulse length. The highlighted columns while in the desk under define the related pulse lengths for our specified LIDT values.
The situation of your green curve is determined by θ. In such cases, the angle θ is tuned to provide a refractive index for 515 nm mild that matches the refractive index for 1030 nm mild. This tuning angle is as a result optimized for Variety-I SHG period matching and a basic-frequency input beam of 1030 nm.
The period matching angle might be adjusted by rotating the crystal across the y axis. An adjustment that is typically within a handful of levels can both optimize the functionality of your crystal from the setup or match A further fundamental frequency within the crystal's running array.
The 266nm generation makes certain that these interactions are finely tuned, permitting scientists to glean insights with enhanced precision. No matter whether it’s in researching sophisticated molecules, determining the Qualities of recent resources, or in environmental monitoring, the BBO crystal’s capacity to deliver 266nm light amplifies the depth and accuracy of spectroscopic experiments.
Now Look at the utmost power density to that which is specified given that the LIDT for the optic. If your optic was tested at a wavelength in addition to your operating wavelength, the injury threshold must be scaled appropriately.
Figure 18: The standard and extraordinary refractive indices of β-BBO fluctuate with frequency and wavelength due to a material house known as dispersion. Dispersion exists in all media apart from vacuum.
Nonetheless, though BBO crystals can function at room temperature, Excessive temperatures must nonetheless be averted as they are able to have an effect on the crystal’s period-matching problems and perhaps bring about problems.
BBO crystals should be taken care of with treatment in order to avoid scratching or harming their surfaces. They ought to be saved in a dry, interesting put and saved from direct daylight. Standard cleaning using a soft cloth or air blower is usually recommended to maintain their optical performance. When managing BBO crystals, it’s crucial that you use gloves to stop oils in the pores and skin from contaminating the crystal area.
The stage velocity is the rate at which the field copyright, i.e. the sine wave, travels in a material. The rate at which a pulse envelope travels in a material is more info called the team velocity and defines the pace with the energy packet comprising the optical pulse traveling via the material.
Thorlabs offers a large choice of optics optimized for use with femtosecond and picosecond laser pulses. Please see below To learn more.
The angular articles in the resultant SHG pulse, or beam, during the dimension of the angular filter is lessened from an excellent case. While in the perpendicular dimension, the SHG beam preserves the angular written content on the input beam, considering the fact that there’s no angular filter in that dimension. A diverging beam with asymmetric NA’s, i.e. within the horizontal and vertical dimensions, causes an elliptical beam.
The temporal walk-off is commonly regarded severe in the event the temporal lag exceeds the length of the elemental pulse. Serious wander-off may end up in temporal lag that irreparably increases the length with the output 2nd harmonic pulse.
This is especially essential in industries like semiconductors and micro-electromechanical programs (MEMS), exactly where even a slight mistake can render a part ineffective or bring on significant losses. With BBO’s 266nm era, industries can reach better accuracy and dependability in their fabrication procedures, driving innovation and item quality to new heights.