By way of example, take into consideration a basic pulse propagating more than a specified crystal thickness. If the temporal stroll-off is larger as opposed to period of the fundamental pulse, this pulse will also have a spectral bandwidth that enormously exceeds the spectral width in the reference pulse. A normal rule for restricting the detrimental results connected to the two Bodily results is to select a crystal thickness that boundaries the fundamental and 2nd harmonic temporal wander-off to not more than the period of the basic pulse.
A2: Of course, prolonged exposure to humidity can degrade the optical functionality of BBO crystals. Humidity may result in drinking water absorption over the crystal area, which often can impact its optical properties.
The temporal stroll-off with the slower pulse with regard for the more quickly can be a substantial fraction of the heart beat duration. This really is illustrated in Determine 22.
Borates which include LBO and BBO also do the job very well in broadly tunable optical parametric oscillators and optical parametric chirped-pulse amplification.
For beams having a higher PRF both of those the standard and peak powers needs to be when compared to the equal CW electrical power. Furthermore, for very clear products, There exists small to no drop during the LIDT with raising PRF.
Various aspects can have an affect on the general performance of BBO crystals. These include things like temperature, humidity, and the standard of the incident light. Proper managing and storage may also help manage the crystal’s overall performance. Temperature can have an impact on the stage-matching circumstances of BBO crystals, which subsequently affects their efficiency in frequency conversion apps.
The Rayleigh range quantifies the gap, calculated from the beam midsection, around which the beam diameter is close to continual. The shorter the Rayleigh assortment, the larger the rate of divergence.
g. twenty μm. The group velocity mismatch in the thicker substrate content may well not issue, given that the nonlinear interaction normally takes location only in The skinny crystal. The substrate only get more info serves to mechanically stabilize The skinny nonlinear crystal.
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GWU-Lasertechnik features all conventional nonlinear crystals like LBO, BBO and KTP that has a broad a number of specs. Beside the very well-established materials, innovative crystals like CLBO or BiBO with superb Houses for e. g. deep-UV generation or high-power ultrashort pulse lasers are available. Irrespective of if person parts for R & D functions are expected or Price-successful numbers in modest, medium or large batches with in-time supply to the output line are essential: GWU’s dedicated assistance helps to discover the finest core parts for your software.
BBO crystals are renowned for his or her Extraordinary optical properties. Their broad transparency selection will allow them to operate correctly across a broad spectrum, from ultraviolet to around-infrared gentle. This makes them extremely versatile and suitable for many different programs.
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The wavelength of The sunshine made use of as well as the angle at which it enters the crystal may effect the crystal’s functionality. Proper alignment and dealing with of the crystal are essential to accomplishing ideal overall performance.
This decreases the efficient conversation dimensions as well as lowers the conversion performance. For example, BBO crystals have an angular walk-off of regarding 38 mrad for SHG at 1064 nm wavelength, which has to try and do with 6 times much larger than KDP crystals.