5 Simple Techniques For a-BBO Crystal
5 Simple Techniques For a-BBO Crystal
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This sort of resilience ensures that its nonlinear Houses are certainly not effortlessly compromised, rendering it a favorite in environments wherever regularity and reliability are paramount.
Any scratches can degrade the optical effectiveness with the crystal and likely lead to harm under high laser energy. For stubborn stains, a solution of gentle detergent or isopropyl alcohol is usually Carefully placed on the crystal surface area and then rinsed off with distilled water.
A: A superior damage threshold ensures the crystal can deal with much more electrical power with no degrading, resulting in extended lifespan and constant performance.
From a ray-design point of view, the propagation route defines the orientation of the central (Main) ray in Figure 23. The SHG approach is afflicted with the range of angles more than which incident mild propagates, mainly because mild that isn't parallel to your chief ray has diminished phase-matching relative to your Main ray.
The performance of the SHG process decreases significantly as the basic beam diverges from its target, Considering that the pulse Power is distributed throughout a larger beam cross portion.
Figure fourteen demonstrates a departure from an excellent polarization orientation for Variety-I SHG, wherever the incident elementary discipline features a linear polarization but is rotated by a degree γ from the principal ordinary axis .
Rather then decompose the SHG polarization into elements Ex and Ez, the light is often referred to as a unprecedented wave (E'e) having a refractive index, n'e. Within the diagram on the right, n'e, which depends on θ, is indicated via the intersection with the conic portion illustrated because of the crimson ellipse Using the XZ airplane.
Comprehending Crystal is akin to appreciating the bedrock of advanced optical engineering. At its essence, BBO, or Beta Barium Borate, stands for a nonlinear optical crystal. The time period “nonlinear�?right here signifies the distinctive means in the crystal to communicate with light within a way that alters The sunshine’s frequency.
Consequently, the 2nd harmonic pulse spectrum, proven on the right, contains a spectral width about similar to The perfect case. Preferably, each and every frequency in the elemental pulse spectrum will be at the same time period matched.
The fundamental supply is the dye laser radiation pumped by the second harmonic of a Q-switched Nd: YAG laser. A walk-off compensated configuration With all the BBO crystal pair has enabled us to understand this type of large conversion effectiveness while in the interaction.
For beams having a higher PRF both equally the common and peak powers has to be in comparison to the equal CW electrical power. Additionally, for remarkably transparent products, There exists minimal to no drop in the LIDT with rising PRF.
When laser mild is focused to the place, the diameter in the beam waist is the focal location measurement, and the rate at which The sunshine diverges through the beam waist is associated with the Rayleigh range (zR).
This information dives deep into the advantages and unique Qualities of BBO crystal and its click here paramount worth in economical frequency doubling and harmonics generation at 266nm.