The best Side of a-BBO Crystal
The best Side of a-BBO Crystal
Blog Article
Please use "Incorporate to Cart" to put the appealing merchandise while in the browsing cart. Look at with on-line payment or request us for the prices/availability by means of the shopping cart.
A2: Sure, extended publicity to humidity can degrade the optical general performance of BBO crystals. Humidity can cause drinking water absorption to the crystal area, which may affect its optical Attributes.
There are two velocities that outline the propagation of sunshine in optical media: the section and team velocities. The period velocity may be the speed in the provider, the oscillation of the electric area, plus the velocity that is certainly matched among the fundamental and 2nd harmonic frequencies for stage matching. The stage velocity relative towards the velocity of light in the vacuum is outlined through the index of refraction.
Beam diameter can be crucial to know when comparing hurt thresholds. Whilst the LIDT, when expressed in units of J/cm², scales independently of spot measurement; significant beam sizes usually tend to illuminate a bigger amount of defects which can cause larger variances in the LIDT [4].
Lastly, the extensive-angle tunability of BBOs facilitates customization like in no way in advance of. Depending on the distinct necessities of the software, the crystal could be altered with precision, ensuring the output is usually optimized.
The efficiency with the SHG method decreases substantially as the elemental beam diverges from its focus, Because the pulse Vitality is dispersed throughout a bigger beam cross portion.
Although the check final results are only representative of one coating operate, Thorlabs specifies destruction threshold values that account for coating variances.
Some companies' SHG crystals, which include Thorlabs', give in the vicinity of-section-matched circumstances for Typically incident enter light-weight for a specified essential frequency. These producers polish the faces from the SHG crystals this sort of the angle involving the Generally incident gentle as well as optic axis is the phase-matched angle for the specified frequency.
Such as, take into account a fundamental pulse propagating in excess of a specified crystal thickness. Once the temporal wander-off is greater when compared to the duration of the basic pulse, this pulse will even have a spectral bandwidth that significantly exceeds the spectral width on the reference pulse. A typical rule for limiting the detrimental consequences associated with equally Actual physical effects is to settle on a crystal thickness that limits the fundamental and 2nd harmonic temporal stroll-off to not more than the period of the fundamental pulse.
With right care and more info dealing with, BBO crystals can last for a few years. However, their lifespan is often shortened by elements for instance high temperature, humidity, and Bodily destruction. BBO crystals are robust and durable, but Like several optical component, they could degrade eventually if not appropriately cared for.
The raw supplies, generally a mixture of barium carbonate and boric acid, are put inside of a platinum crucible and heated right until they soften. The temperature is then little by little minimized, letting the BBO crystal to kind above numerous months. The crystal is then extracted, Slash into the specified condition, and polished to accomplish a substantial-high-quality optical floor.
When evaluating an LIDT specified for just a pulsed laser to your laser, it is essential to learn the following:
A proposed guideline for focusing femtosecond laser pulses into a nonlinear crystal is to keep up a Rayleigh variety that is at the least various periods more time compared to length of your SHG crystal. This minimizes the possibility of damaging the crystal, and decreases the negative outcomes of spatial phase mismatch and spatial (Poynting vector) stroll-off.
Era of deep ultraviolet radiation at 210 nm by Sort-I third harmonic generation is achieved inside of a set of BBO crystals with conversion effectiveness as higher as 36%.