Optical parametric oscillation (OPO): We make the most of OPO to determine our things�?nonlinear conversion general performance and period-matching angle for any presented enter wavelength and sign/idler wavelengths. We make certain that our objects fulfill the necessities for OPO programs.
BBO is the one NLO product that may be used to generate the fifth harmonic era (5HG) of Nd:YAG lasers at 213 nm. Thanks to a small acceptance angle and enormous angular walkoff, very good laser beam quality (little divergence, great mode condition, and so forth.
5 mm to attenuate team velocity mismatch and are perfect for frequency doubling or tripling of Ti:sapphire and Yb:doped laser pulses. The crucial and noncritical stage matching LBO crystals are ideal for next or third harmonic generation of Nd:YAG and Yb:doped lasers.
) is The crucial element for BBO to obtain large conversion efficiency. Tight target of laser beam is just not encouraged.
This has not merely expanded the abilities of existing technologies but has also paved just how For brand new innovations.
Quite a few various period-matching approaches can be used to equalize the refractive indices of the elemental and 2nd harmonic light. One particular system, which utilizes linearly polarized light and also the difference between the ordinary and extraordinary refractive indices, is Type-I significant phase matching. It is a popular solution for adverse uniaxial crystals during which no > ne.
The majority of the conventional nonlinear crystals like BBO, LBO, BiBO or KTP for frequency doubling, tripling and quadrupling of the elemental laser radiation are available from stock. Consumer-certain Proportions and AR coatings are offered at competitive selling prices.
g. twenty μm. The group velocity mismatch from the thicker substrate materials might not matter, as being the nonlinear interaction usually takes area only in The skinny crystal. The substrate only serves to mechanically stabilize The skinny nonlinear crystal.
We also layer our goods with anti-reflection levels to lower illustration losses at the crystal surfaces.
For the reason that dynamics of this process are very issue to experimental parameters, it's tough to arbitrarily forecast the exact results on the second harmonic pulse. These outcomes can involve again conversion, wherein second harmonic mild is transformed back again to fundamental light-weight, and spectral narrowing from the SHG pulse.
The raw resources, usually a mixture of barium carbonate and boric acid, are put in a platinum crucible and heated right until they soften. The temperature is then slowly minimized, letting the BBO crystal to sort in excess of many months. The crystal is then extracted, cut into the specified condition, and polished to accomplish a significant-quality optical surface area.
Many various Qualities of the nonlinear crystal is usually essential for an application e.g. in nonlinear frequency conversion:
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Even if the crystal materials or more info coating isn't delicate to h2o, tiny water droplets may well concentrate laser radiation extra tightly than less than usual Procedure, and so harm the crystal substance.