The Basic Principles Of CLBO Crystal
The Basic Principles Of CLBO Crystal
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Based on the proof-of-theory experiment, the conversion efficiency of 23% implied the potential of obtaining superior-energy at the second Stokes wavelength in the Raman laser. Should the pump laser of 1078 nm could possibly be acquired at the typical energy of 50 W, the output energy of its 2nd Stokes wavelength at 1512 nm could possibly be in excess of 10 W. The design in the Raman laser cavity ought to be optimized in an effort to avoid the harm of the M1 and diamond area.
The true secret dilemma of ultraviolet coherent gentle resource primarily focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal has become the disorders for frequency transformation, so the growth, dimension, injury resistance, conversion effectiveness and allowable parameter number of nonlinear optical crystal are needed An increasing number of.
On the other hand, the beam high-quality of this higher electric power DUV laser would grow to be worse as a consequence of a lot more really serious thermal and nonlinear consequences. Consequently, the frequency conversion processes need to be very carefully meant to mitigate the aforementioned effects. Hence, a substantial-electric power DUV laser within the FHG of one μm with a very good beam good quality can be attained and may be beneficial for obtaining the shorter wavelength DUV lasers such as 193 nm by SFG.
The two the 1040 nm and 1078 nm laser come from a single dual-wavelength Yb-doped fiber laser. Every laser is amplified by stages of fiber amplifier and Yb-doped products amplifier, respectively.
On the other side, the power scaling on the NIR laser is an additional element to boost the average electrical power from the 193-nm DUV laser. Due to not enough the large-power amplification Alternative in the NIR laser (for instance at 1553 nm), nonlinear frequency procedures such as optical parameter oscillation (OPO) may very well be applied to build a wavelength converter by shifting the wavelength from one μm to the desired wavelength and also obtaining relative better electrical power [21]. Not long ago, a diamond Raman laser showed its skill in reaching a significant power plus a superior conversion efficiency in the 1st Stokes from the 1-μm laser [22,23], which implies the possibility being used during the 193-nm DUV laser era on account of its significant Raman attain and enormous frequency shift.
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Furthermore, get more info combining the stable-state laser with other nonlinear system including stimulated Raman scattering, NIR lasers can be accomplished at new wavelengths with higher electric power and higher beam good quality, which was analyzed by the proof-of-theory experiment. This Raman laser scheme gives a different path to the high-energy DUV laser, Specially within the wavelength of 193 nm.
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The conversion effectiveness from essential NIR to DUV is from 5% to 36% in accordance with the documented ends in Desk 1. Expanding the conversion efficiency will lessen the burden on the design and set up of the elemental laser amplifier together with the electrical energy intake. A good beam top quality of the elemental laser will also contribute on the increasing in the conversion effectiveness and the appropriate energy intensity on the NIR and inexperienced laser during the SHG and FHG procedure, respectively. The highest conversion efficiencies from NIR to green and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all over fifty%, respectively [12], which corresponds for the conversion efficiency of 35% from fundamental to DUV.
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