5 Simple Techniques For BBO Crystal
5 Simple Techniques For BBO Crystal
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A: Yes, BBO crystals exhibit impressive thermal balance, producing them suited to purposes with varying temperatures.
The two frequencies' stage velocities are equal when they contain the exact refractive index. The refractive indices for these two frequencies are normally not equivalent, mainly because all media apart from vacuum are dispersive. Because of this a material's refractive index is determined by the light's frequency.
five mm to attenuate team velocity mismatch and are perfect for frequency doubling or tripling of Ti:sapphire and Yb:doped laser pulses. The significant and noncritical period matching LBO crystals are perfect for second or 3rd harmonic generation of Nd:YAG and Yb:doped lasers.
The section-matching capabilities of BBO crystals ought to have Particular mention. While in the intricate dance of photons, where conversion from a person wavelength to another is commonly ideal, the period-matching provided by BBO makes certain that Vitality losses are minimal.
Even effectively beneath the edge for fast hurt, some crystal products exhibit a ongoing degradation throughout the used quantity, e.
A standard process for getting ultrathin crystals should be to initial optically Speak to a thicker nonlinear crystal with a few substrate (e.g. of fused silica) and then to shine the crystal right down to the needed thickness of e.
When an optic is ruined by a constant wave (CW) laser, it is frequently because of the melting with the surface due to absorbing the laser's Power or damage to the optical coating (antireflection) [1]. Pulsed lasers with pulse lengths longer than one µs might be treated as CW lasers for LIDT discussions.
Along with their use in laser frequency conversion, BBO crystals have found programs in electro-optic modulation and quantum optics experiments.
For shopper benefit the crystals is often mounted in an 1" anodized aluminum (Al) mount. The mounted crystals could be more mounted in a conventional 1" mirror mount to be angle tuned for phase matching (as revealed to the best). H2o-cooled mounts for prime energy applications is usually made available on request.
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When comparing an LIDT specified for the pulsed laser for your laser, it is essential to be aware of the subsequent:
Though the exam benefits are only agent of one coating run, Thorlabs specifies destruction threshold values that account for coating variances.
In combination with their substantial harm threshold, BBO crystals also show excellent thermal and chemical security. They could withstand a variety of temperatures and resist degradation from numerous chemical interactions.
This decreases the productive communication size and likewise lowers the conversion efficiency. For website example, BBO crystals have an angular stroll-off of relating to 38 mrad for SHG at 1064 nm wavelength, that has to do with 6 times larger sized than KDP crystals.