New Step by Step Map For CLBO Crystal
New Step by Step Map For CLBO Crystal
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All-stable-point out ultraviolet lasers are actually broadly used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of small quantity, very long lifetime, substantial efficiency, fantastic beam high-quality, huge tuning and narrow spectral line, etcetera. Employing significant ability in the vicinity of-infrared coherent gentle resource as the basic frequency resource dependant on nonlinear tuning technology, making ultraviolet coherent radiation by multistage frequency conversion is thought to be a very important approach to establish the ultraviolet coherent mild source.
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In accordance with the proof-of-principle experiment, the conversion performance of 23% implied the possibility of acquiring large-ability at the second Stokes wavelength from the Raman laser. When the pump laser of 1078 nm may very well be attained at the typical electricity of 50 W, the output electricity of its 2nd Stokes wavelength at 1512 nm may very well be in excess of ten W. The design on the Raman laser cavity really should be optimized in an effort to stay away from the harm of your M1 and diamond floor.
The real key challenge of ultraviolet coherent light resource largely concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is amongst the problems for frequency transformation, so The expansion, sizing, problems resistance, conversion effectiveness and allowable parameter variety of nonlinear optical crystal are essential A lot more.
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On one other facet, the facility scaling of the NIR laser is yet another part to raise the common electrical power from the 193-nm DUV laser. Because of the not enough the substantial-electrical power amplification solution with the NIR laser (as an example at 1553 nm), nonlinear frequency procedures for example optical parameter oscillation (OPO) might be applied to make a wavelength converter by shifting the wavelength from one μm to the specified wavelength and getting relative better electrical power [21]. A short while ago, a diamond Raman laser confirmed its capacity in acquiring a substantial ability in addition to a large conversion effectiveness within the 1st Stokes on the 1-μm laser [22,23], which implies the chance being utilized within the 193-nm DUV laser generation due to its large Raman achieve and huge frequency change.
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The heartbeat period of the second Stokes light was shortened to five ns as demonstrated in Determine 7a, an individual-shot photograph in the oscilloscope, which happens to be a common phenomenon in Raman laser [44] when the heart beat duration in the pump laser was 10 ns.
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The beam profile proven in Figure 7b demonstrated a good beam high quality as one of several merits of Raman laser, which would be advantageous to deliver a 193-nm DUV website laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as large as that of KDP. CLBO crystals is often grown within the stoichiometric melt with lessen viscosity.
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