Examine This Report on a-BBO Crystal
Examine This Report on a-BBO Crystal
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Typical cleaning and appropriate storage will help increase the lifespan of BBO crystals. It’s also crucial that you avoid exposing the crystals to ailments outside the house their specified functioning array, as this may cause everlasting destruction.
The group velocities of the elemental and next harmonic pulses can also be different, regardless if stage-matched, as well as magnitude from the team velocity mismatch will depend on the crystal properties plus the optical frequencies in the pulses.
Any scratches can degrade the optical efficiency on the crystal and potentially cause harm underneath substantial laser electric power. For stubborn stains, an answer of moderate detergent or isopropyl Liquor is often gently placed on the crystal area and after that rinsed off with distilled h2o.
As Beforehand stated, pulsed lasers commonly induce a special type of injury to the optic than CW lasers. Pulsed lasers typically usually do not warmth the optic ample to break it; alternatively, pulsed lasers generate robust electric powered fields effective at inducing dielectric breakdown in the material.
No matter if it’s in the event of a lot more successful lasers, the exploration of quantum phenomena, or maybe the creation of latest optical gadgets, BBO crystals will unquestionably keep on to play a pivotal position.
They also have a higher destruction threshold, enabling them to manage superior-electric power laser beams with no degradation. These one of a kind Attributes make BBO crystals a flexible Software in several optical applications.
Though the exam results are only agent of 1 coating operate, Thorlabs specifies injury threshold values that account for coating variances.
The damage Assessment are going to be completed on a similar optic (purchaser's optic will not be damaged). Tests may possibly result in more charges or lead moments. Contact Tech Guidance for more information.
As an example, look at a elementary pulse propagating around a supplied crystal thickness. When the temporal wander-off is bigger in comparison to the length of the elemental pulse, this pulse will even have a spectral bandwidth that greatly exceeds the spectral width on the reference pulse. A basic rule for restricting the harmful effects connected with both Actual physical effects is to select a more info crystal thickness that limitations the fundamental and second harmonic temporal walk-off to no more than the length of the fundamental pulse.
For that reason, the next harmonic pulse spectrum, proven on the right, includes a spectral width approximately the same as the ideal scenario. Ideally, each and every frequency in the fundamental pulse spectrum could be concurrently section matched.
The fundamental source may be the dye laser radiation pumped by the 2nd harmonic of a Q-switched Nd: YAG laser. A walk-off compensated configuration Together with the BBO crystal pair has enabled us to comprehend this type of higher conversion performance during the conversation.
Certainly, BBO crystals is often customized In keeping with distinct requirements. This includes custom sizes, styles, and coatings. Nevertheless, customization may well have an impact on the crystal’s Attributes and general performance, so it ought to be done by a professional. Customized sizes and shapes may be Reduce from a larger BBO crystal to suit particular apps.
The Bodily, chemical, optical, and thermal Houses with the α -BBO are much like People with the BBO crystals, nevertheless the α -BBO isn't going to show the nonlinear optical Homes because of the central symmetry of its crystal composition.
Also, the structural and compositional characteristics of BBO present it with amazing thermal security and resistance towards environmental difficulties.