Not known Factual Statements About CLBO Crystal

Not known Factual Statements About CLBO Crystal

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All-stable-point out ultraviolet lasers are actually greatly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of small quantity, extensive life, high performance, fantastic beam good quality, vast tuning and narrow spectral line, etc. Utilizing high power in the vicinity of-infrared coherent gentle source as the basic frequency resource based upon nonlinear tuning know-how, generating ultraviolet coherent radiation by multistage frequency conversion is considered to be a vital way to produce the ultraviolet coherent light-weight source.

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The average ability with the NIR laser even now has the likely for being enhanced to tens of watts like 70 W [26] In case the double-pass configuration can be utilized for the Yb:YAG SCF amplifier stage. Hence, If your conversion efficiency of 31% from NIR to DUV could possibly be still taken care of at this higher electric power situation, the normal output power on the DUV laser at 258 nm can be greater than 20 W, which would certainly be a impressive ability level to the DUV laser and bring on the unanticipated DUV laser machining success. Moreover, for high-power DUV laser, the UV damage from the nonlinear crystal, such as the Home windows for CLBO crystal plus the mirrors, is another important parameter for long term and secure Procedure.

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On the opposite aspect, the power scaling of the NIR laser is yet another factor to raise the average ability on the 193-nm DUV laser. A result of the deficiency of the superior-electric power amplification Remedy of the NIR laser (one example is at 1553 nm), nonlinear read more frequency processes which include optical parameter oscillation (OPO) could possibly be placed on create a wavelength converter by shifting the wavelength from one μm to the specified wavelength and obtaining relative increased ability [21]. A short while ago, a diamond Raman laser showed its capacity in accomplishing a high energy plus a high conversion efficiency in the 1st Stokes in the 1-μm laser [22,23], which implies the likelihood to get utilized from the 193-nm DUV laser era as a consequence of its significant Raman get and huge frequency shift.

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From the scientific and industrial apps, the beam good quality in the DUV laser can be a very important parameter. Significantly, the beam excellent on the DUV laser drastically affects the laser machining effects. The beam excellent with the DUV laser is determined by that of the elemental laser as well as the crystal with the frequency conversion. Just lately, a significant-energy DUV laser (>ten W) at 258 nm was reported by using a beam high quality of M2 < one.five, which was generated by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would lead to a much better laser machining final result in comparison with the past DUV lasers with larger M2.

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The beam profile shown in Figure 7b shown a good beam high quality as one of several deserves of Raman laser, which would be helpful to make a 193-nm DUV laser with a high quality beam.

Its UV absorption edge reaches 180 nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as huge as that of KDP. CLBO crystals can be developed in the stoichiometric soften with reduce viscosity.

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