The crystal axis is c. The Main ray is parallel towards the route utilized to measure the tuning angle (θ), that's optimized in the course of phase matching. Conversion performance is optimized for rays parallel on the chief ray and even worse for rays at bigger angles (ψ) into the Main ray.

Beta Barium Borate (BBO) crystals have already been a topic of interest in the sphere of optics and photonics because of their exceptional Homes. In the following paragraphs, we intention to answer 10 popular questions about BBO crystals, delivering an extensive understanding of this intriguing substance.

Hello there, thanks for making contact with Thorlabs. The wavelength ranges of your antireflective coatings on these β-BBO crystals align with the respective wavelength bands that these crystals are optimized for. Requests for customizations is usually produced by achieving out to us at [email protected]

Nevertheless, to totally employ the opportunity of BBO crystals, it is actually important to grasp their Homes and how to manage and store them appropriately. These crystals call for mindful dealing with to circumvent damage to their surfaces and will be saved within a dry, cool area to maintain their optical performance.

Determine 23: This diagram illustrates a beam's focal region in the uniaxial birefringent substance. Straight traces, representing rays, are drawn in the Heart with the beam waistline. As being the beam diverges from the beam waistline, the Electricity from the beam is distributed above a bigger cross sectional place.

Offered these apps, it’s apparent why BBO, with its inherent functionality to effectively deliver the 266nm wavelength, is so highly prized. The crystal’s one of a kind nonlinear optical properties permit the conversion of other wavelengths into the coveted 266nm light-weight, guaranteeing that researchers and industries have usage of this vital tool.

Figure 18: The ordinary and extraordinary refractive indices of β-BBO change with frequency and wavelength resulting from a fabric home referred to as dispersion. Dispersion exists in all media other than vacuum.

As an alternative to decompose the SHG polarization into elements Ex and Ez, The sunshine is often called a unprecedented wave (E'e) by using a refractive index, n'e. During the diagram on the correct, n'e, which is dependent upon θ, is indicated through the intersection from the conic portion illustrated through the pink ellipse With all the XZ plane.

Because the refractive index isn't going to vary linearly with frequency in dispersive crystals like β-BBO, it really is not possible to optimally section match just about every frequency in the enter pulse's spectral assortment Together with the corresponding second harmonic frequency inside the generated pulse.

On the other hand, there is absolutely no second buy nonlinear outcome in alpha-BBO crystal due to centrosymmetry in its crystal construction and therefore it's got no use for 2nd get nonlinear optical processes. In its place, alpha-BBO is extensively useful for fabrication of polarizers, polarizing beam displacers, phase retarders, birefringent plates, and time delay compensators especially Individuals for UV and large electrical power lasers.

It can be broadly used for nonlinear frequency conversion click here from the ultraviolet, visible, and in the vicinity of-infrared. The BBO crystal is definitely the most important nonlinear crystal for around-infrared optical parametric chirped-pulse amplifiers, which at the moment produce number of optical cycle pulses with higher average and ultrahigh peak powers.

For beams by using a large PRF both of those the standard and peak powers have to be when compared with the equivalent CW energy. On top of that, for extremely transparent supplies, There may be minor to no drop during the LIDT with rising PRF.

The temporal walk-off is frequently deemed intense once the temporal lag exceeds the period of the basic pulse. Severe stroll-off may end up in temporal lag that irreparably increases the length from the output 2nd harmonic pulse.

In frequency conversion, BBO crystals are utilized to change the colour of laser light, enabling the production of a variety of colours that are not instantly obtainable from readily available laser resources. In electro-optic modulation, they are used to control the depth, section, polarization, or direction of the laser beam.