What Does BBO Crystal Mean?
What Does BBO Crystal Mean?
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The two broad-bandwidth pulses and temporal wander-off induce a reduction from the conversion efficiency, together with worsen the optical high-quality of the next harmonic pulses. The suitable crystal thickness really should be chosen to minimize equally outcomes.
Nonetheless, when BBO crystals can run at place temperature, extreme temperatures should really however be prevented as they could have an effect on the crystal’s stage-matching problems and potentially induce damage.
The Electrical power in the two waves propagates in directions based on their Poynting vectors. Snell's legislation does not describe the direction of Vitality movement, but it surely can be employed to determine the path on the k-vector in the crystal.
Inside the extensive planet of nonlinear optical crystals, BBO crystals stand out as pioneers, particularly in the realm of 266nm generation.
Soon after extraction, the BBO crystals are then Slice into the specified shapes and sizes. This cutting procedure is carried out with precision devices to ensure that the crystals are Slash precisely and cleanly.
Higher harm threshold: BBO crystals have high problems boundaries which will arise for their superior major and regular ability devoid of degradation or hurt.
Now Evaluate the utmost electricity density to that which is specified as being the LIDT with the optic. When the optic was tested at a wavelength in addition to your working wavelength, the harm threshold should be scaled appropriately.
BBO crystals are used in the wide array of apps because of their Extraordinary optical Attributes. They are generally Utilized in laser methods for frequency conversion, like second, 3rd, and fourth harmonic technology. This enables with the production of laser light at distinct wavelengths from a single input wavelength.
For purchaser convenience the crystals might be mounted in an one" anodized aluminum (Al) mount. The mounted crystals is usually additional mounted in a conventional one" mirror mount to become angle tuned for phase matching (as proven to the proper). Drinking water-cooled mounts for high ability apps is usually offered upon request.
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Too much optical intensities all through Procedure could instantaneously harm a crystal. Sad to say, nonlinear crystals typically need to be operated not significantly from their optical hurt threshold to obtain a adequately superior conversion efficiency. This means a trade-off among conversion efficiency and crystal life span.
In frequency conversion, BBO crystals are utilized to alter the color of laser mild, enabling the manufacture of a wide array of colors that aren't straight available from available laser resources. In electro-optic modulation, These are made use of to manage the intensity, phase, polarization, or route of the laser beam.
The magnitude of your successful nonlinear coefficient will depend on the nonlinear tensor elements and to the used phase-matching configuration. A significant nonlinearity is essential specifically If your achievable optical intensities are lower.
Some brands' SHG crystals, which includes Thorlabs', deliver more info close to-section-matched circumstances for Generally incident input light for your specified fundamental frequency. These brands polish the faces on the SHG crystals these which the angle involving the Typically incident mild and the optic axis will be the period-matched angle for the desired frequency.