The best Side of BBO Crystal
The best Side of BBO Crystal
Blog Article
This efficiency is vital, especially when 1 considers the generation on the 266nm wavelength, wherever even slight inefficiencies may lead to sizeable Vitality losses.
Although the above process offers a good guideline for LIDT values, make sure you Call Tech Guidance In case your wavelength is different from the desired LIDT wavelength. Should your ability density is a lot less than the adjusted LIDT of the optic, then the optic should do the job on your software.
This is particularly important in Organic and health care exploration the place distinct compounds or cells are tagged with fluorescent markers. The 266nm mild can excite these markers, earning them jump out Plainly in opposition to a qualifications, thus facilitating comprehensive Investigation.
It is actually extensively employed for nonlinear frequency conversion inside the ultraviolet, obvious, and around-infrared. The BBO crystal could be the most critical nonlinear crystal for close to-infrared optical parametric chirped-pulse amplifiers, which presently deliver number of optical cycle pulses with substantial regular and ultrahigh peak powers.
Wide openness wide variety: BBO crystals have a broad openness array from 189 nm to 3500 nm, masking ultraviolet, seen, and in close proximity to-infrared locations. This enables BBO crystals to be used for various laser sources with various wavelengths.
Stage matching significantly improves the conversion effectiveness and might be needed to acquire adequate frequency-doubled mild for apps, but next harmonic technology (SHG) will take place whether or not section matching is not really performed. The result of period matching to the output intensity of SHG light-weight (I2ω) is illustrated in Figure 16.
Figure 18: The everyday and amazing refractive indices of β-BBO fluctuate with frequency and wavelength because of a material house known as dispersion. Dispersion exists in all media apart from vacuum.
The size on the crystal is a vital parameter to take into account when optimizing the SHG approach to the parameters of certain enter pulses. Absent period-matching and temporal stroll-off effects, the SHG output increases exponentially with crystal size. The intention when selecting an SHG crystal will be to harmony the crystal size with the restrictions based on the fundamental pulse. Decreasing the crystal thickness reduces outcomes connected with both equally period-matching bandwidth limitations and temporal wander-off, which might be immediately related.
These procedures involve blending two or more input beams of light with numerous frequencies to make a consequence beam with a new frequency.
If you don't discover the suited solutions earlier mentioned, chances are you'll let's know your prerequisites or purposes in the shape down below. Our income or specialized here employees can get back again for you without delay.
NCPM takes place if the input beam propagates at an angle other than zero or ninety levels worrying on the list of big axes, like the Z-axis. Its polarization is parallel to that axis, like Z-polarized.
In frequency conversion, BBO crystals are utilized to alter the coloration of laser light, enabling the production of a wide range of colors that are not straight accessible from obtainable laser sources. In electro-optic modulation, They're employed to regulate the depth, period, polarization, or course of the laser beam.
The angular content material of the concentrated beam could be visualized by tracing rays within the lens for the focal place. Each ray drawn through the lens to a tightly centered spot (Figure 23) helps make a unique angle (ψ) Using the chief ray, along with the number of angles raises Together with the NA. As being the selection of angles will increase further than the reference NA filter (or angular area apodization filter width), the section-matching of the rays outside of the filter width diminishes as a result minimizing the SHG conversion effectiveness of Those people rays.
On account of its fantastic Attributes BBO crystal contains a range of benefits for different applications, like NOPA with fsec pulses, harmonics technology (nearly fifth) of Nd:YAG and Nd:YLF lasers, frequency doubling or tripling of femtosecond Ti:Sapphire and dye lasers, OPO at Variety 1 and Type two period-matching, E/O switching for Pockels cells and a number of other.