CLBO Crystal Fundamentals Explained
CLBO Crystal Fundamentals Explained
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Having said that, so that you can method the crystal is extremely advanced producing strategies are demanded. For the reason that dawn of this crystal, focusing on this obstacle, we are actually the only real organization in the world which can be processed in this crystal.
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Based on the evidence-of-basic principle experiment, the conversion performance of 23% implied the possibility of obtaining superior-power at the second Stokes wavelength in the Raman laser. If your pump laser of 1078 nm can be attained at the average power of fifty W, the output electrical power of its 2nd Stokes wavelength at 1512 nm may very well be much more than ten W. The design in the Raman laser cavity need to be optimized so that you can stay away from the injury from the M1 and diamond area.
The common electrical power from the NIR laser nonetheless has the potential to generally be improved to tens of watts such as 70 W [26] In the event the double-move configuration might be used to the Yb:YAG SCF amplifier phase. That's why, if the conversion effectiveness of 31% from NIR to DUV may very well be nevertheless preserved at this higher electricity condition, the typical output electricity of the DUV laser at 258 nm can be in excess of twenty W, which would be considered a extraordinary electricity level for your DUV laser and cause the unanticipated DUV laser machining effects. Additionally, for top-power DUV laser, the UV harm from the nonlinear crystal, including the Home windows for CLBO crystal and the mirrors, is yet another vital parameter for lasting and steady operation.
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LBO is additionally a wonderful nonlinear crystal which is always applied to the SHG with the NIR to the eco-friendly. The DUV laser will likely be understood by two stages of SFG inside the LBO crystals due to the fact there isn't any phase-matching angle for LBO to transform the environmentally friendly laser at 515 nm or 532 nm into the DUV straight by SHG [16]. Not too long ago, the NSBBF crystal has also proven its prospective to obtain a higher conversion efficiency from 532 nm to 266 nm. The wander-off angle and deff from the NSBBF are Virtually similar to those of CLBO [17].
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The pulse length of the second Stokes gentle was shortened to 5 ns as demonstrated in Figure 7a, only one-shot image from the oscilloscope, and that is a common phenomenon in Raman laser [forty four] while the heartbeat period in the pump here laser was ten ns.
Additionally, combining the strong-condition laser with other nonlinear process for example stimulated Raman scattering, NIR lasers could be attained at new wavelengths with superior electric power and higher beam good quality, which was examined via the evidence-of-basic principle experiment. This Raman laser plan provides a fresh route to the large-electricity DUV laser, especially at the wavelength of 193 nm.
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The conversion performance from elementary NIR to DUV is from 5% to 36% based on the reported ends in Desk 1. Rising the conversion performance will reduce the load on the look and set up of the fundamental laser amplifier plus the electric powered energy usage. A fantastic beam high quality of the basic laser will likely contribute for the raising of the conversion efficiency and also the suitable electric power depth of the NIR and eco-friendly laser while in the SHG and FHG course of action, respectively. The best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all around 50%, respectively [12], which corresponds to the conversion performance of 35% from essential to DUV.
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