A Review Of a-BBO Crystal
A Review Of a-BBO Crystal
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The crystal axis is c. The chief ray is parallel towards the way used to evaluate the tuning angle (θ), that is optimized throughout stage matching. Conversion efficiency is optimized for rays parallel for the chief ray and even worse for rays at larger sized angles (ψ) to the Main ray.
A1: Indeed, BBO crystals Have a very large problems threshold, creating them appropriate for significant-ability laser devices. Their means to face up to superior laser intensities without the need of struggling from optical injury will make them a wonderful choice for frequency conversion in high-electric power lasers.
While this guideline presents a standard trend, it is not a quantitative Assessment of LIDT vs wavelength. In CW programs, For example, damage scales a lot more strongly with absorption within the coating and substrate, which isn't going to essentially scale properly with wavelength.
The period matching angle is often modified by rotating the crystal throughout the y axis. An adjustment that is typically within a handful of degrees can both optimize the performance from the crystal inside the set up or match another essential frequency inside the crystal's working variety.
From a ray-model point of view, the propagation direction defines the orientation from the central (chief) ray in Determine 23. The SHG procedure is afflicted with the range of angles around which incident gentle propagates, since light that's not parallel on the chief ray has diminished period-matching relative for the chief ray.
Make sure you Take note that We've got a buffer built in between the specified injury thresholds on the web and the tests which We've got performed, which accommodates variation in between batches. On ask for, we can offer unique test info in addition to a screening certification.
Figure 18: The everyday and amazing refractive indices of β-BBO fluctuate with frequency and wavelength due to a fabric house referred to as dispersion. Dispersion exists in all media besides vacuum.
a-BBO crystals with a wedge angle (α) can be custom fabricated with the required orientation with the optical axis. A paired or these prisms Along with the optical axes orthogonal to each other can be used to repeatedly change the phase change or time hold off among two orthogonally polarized pulses.
Pumped because of the fourth harmonic of the Nd:YAG laser (at 266nm), a tunable OPO with sign wavelength variety amongst 422nm and 477nm is noticed by angle-tuning a sort I BBO crystal. Pumped by a 1mJ, 80fs Dye laser at 615nm, the OPA with two BBO crystals yields over fiftyµJ (maximum one hundred thirtyµJ),
The period velocity is the speed at which the field copyright, i.e. the sine wave, travels in a material. The rate at which a pulse envelope travels in a cloth is known as the team velocity and defines the pace on the Strength packet comprising the optical pulse traveling by means of the fabric.
The basic resource is check here definitely the dye laser radiation pumped by the next harmonic of the Q-switched Nd: YAG laser. A wander-off compensated configuration Along with the BBO crystal pair has enabled us to comprehend this type of higher conversion performance while in the interaction.
This is actually the so-identified as oo-e arrangement, as The 2 photons from the fundamental are polarization-oriented alongside the standard axis and the second harmonic photon's polarization is from the incredible airplane.
Even so, the nonlinear optical Homes of a-BBO crystal is vanished due to the centric symmetry with its crystal composition. It is far from proposed to employ for NLO procedures.
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