The Greatest Guide To CLBO Crystal
The Greatest Guide To CLBO Crystal
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We summarized The existing progress status of your significant-electric power DUV laser each within the wavelength of FHG in the one-μm laser and at 193 nm. The latest advancement of your good-state/fiber laser, and also the nonlinear optical crystals, prompts not just the normal ability but in addition the beam high-quality (coherence) from the DUV lasers to an unprecedented stage.
The crucial element trouble of ultraviolet coherent light resource mainly concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the circumstances for frequency transformation, so the growth, size, damage resistance, conversion performance and allowable parameter number of nonlinear optical crystal are demanded more and more.
On the other hand, the beam high-quality of this higher electrical power DUV laser would grow to be even worse due to far more major thermal and nonlinear results. For this reason, the frequency conversion procedures ought to be meticulously built to mitigate the aforementioned consequences. So, a significant-power DUV laser for the FHG of one μm with a good beam high quality may very well be attained and will be helpful for getting the shorter wavelength DUV lasers including 193 nm by SFG.
As a result of thermal lens effect in the stable-point out lasers, In case the heating management is inadequate, It's not effortless to obtain the stable-state laser which has a substantial power and also a higher beam excellent simultaneously. Lately, with the development of The skinny disk laser and one-crystal fiber (SCF) laser, a superior-electric power laser at the elemental wavelength (1 μm) were recognized with a fantastic beam high-quality In spite of a TEM00 method beam [four,24], which would be very good candidates for the fundamental in the DUV laser era. A further applicant for the basic could be the higher-electrical power fiber laser which could be achieved by coherent beam combination with M2 price lower than one.
On another facet, the power scaling of your NIR laser is an additional element to enhance the ordinary energy with the 193-nm DUV laser. As a result of deficiency of the higher-electric power amplification solution in the NIR laser (such as at 1553 nm), nonlinear frequency processes including optical parameter oscillation (OPO) may very well be placed on build a wavelength converter by shifting the wavelength from one μm to the specified wavelength along with acquiring relative better ability [21]. Recently, a diamond Raman laser showed its ability in reaching a higher electrical power as well as a large conversion efficiency at the 1st Stokes of your one-μm laser [22,23], which suggests the chance to get used inside the 193-nm DUV laser technology due to its superior Raman gain and enormous frequency change.
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The heartbeat period of the get more info second Stokes gentle was shortened to five ns as proven in Determine 7a, only one-shot image with the oscilloscope, which is a common phenomenon in Raman laser [forty four] while the heartbeat length with the pump laser was ten ns.
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The beam profile proven in Figure 7b demonstrated a fantastic beam quality as one of many merits of Raman laser, which would be helpful to create a 193-nm DUV laser with a high quality beam.
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The event in the 193-nm laser was shown by levels of SFG. In an effort to scale the DUV laser power properly, a new principle in the 193-nm DUV laser technology is introduced depending on the diamond Raman laser.