Even so, in an effort to approach the crystal is incredibly Superior manufacturing tactics are necessary. Since the dawn of this crystal, engaged on this challenge, we are actually the only real firm on earth that may be processed On this crystal.
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We summarized the current progress status of your substantial-electrical power DUV laser equally in the wavelength of FHG with the 1-μm laser and at 193 nm. The the latest enhancement on the strong-point out/fiber laser, plus the nonlinear optical crystals, prompts not merely the normal ability but in addition the beam high-quality (coherence) from the DUV lasers to an unprecedented degree.
The main element trouble of ultraviolet coherent light-weight resource largely concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is amongst the disorders for frequency transformation, so the growth, sizing, harm resistance, conversion performance and allowable parameter range of nonlinear optical crystal are needed An increasing number of.
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Equally the 1040 nm and 1078 nm laser originate from a single twin-wavelength Yb-doped fiber laser. Each and every laser is amplified by levels of fiber amplifier and Yb-doped components amplifier, respectively.
On another facet, the ability scaling of your NIR laser is an additional component to raise the average electrical power from the 193-nm DUV laser. Due to the deficiency of the higher-electric power amplification Answer with the NIR laser (for instance at 1553 nm), nonlinear frequency processes which include optical parameter oscillation (OPO) could possibly be placed on establish a wavelength converter by CLBO Crystal shifting the wavelength from 1 μm to the desired wavelength as well as acquiring relative increased electric power [21]. A short while ago, a diamond Raman laser confirmed its means in achieving a high power and a high conversion performance for the 1st Stokes with the 1-μm laser [22,23], which implies the chance to become utilized during the 193-nm DUV laser technology as a consequence of its high Raman gain and huge frequency change.
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The pulse duration of the second Stokes light was shortened to five ns as shown in Figure 7a, only one-shot image with the oscilloscope, which can be a typical phenomenon in Raman laser [forty four] whilst the heartbeat period of your pump laser was 10 ns.
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Tunable ultraviolet laser resource determined by reliable-condition dye laser engineering and CsLiB6O10 harmonic generation
The conversion performance from elementary NIR to DUV is from 5% to 36% based on the reported ends in Desk 1. Raising the conversion efficiency will decrease the stress on the design and setup of the basic laser amplifier as well as the electric electricity use. A good beam top quality of the basic laser can even add to the growing in the conversion effectiveness in addition to the appropriate electrical power depth from the NIR and eco-friendly laser inside the SHG and FHG method, respectively. The highest conversion efficiencies from NIR to green and environmentally friendly to DUV laser by usage of CLBO crystal are 70% and all around 50%, respectively [twelve], which corresponds to your conversion effectiveness of 35% from basic to DUV.
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