The best Side of CLBO Crystal
The best Side of CLBO Crystal
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All-sound-condition ultraviolet lasers are already greatly Employed in the fields of mechanical flaw detection, lithography, micromachining and drugs for the benefits of tiny quantity, extensive life, superior effectiveness, very good beam top quality, vast tuning and narrow spectral line, etcetera. Making use of superior electric power in close proximity to-infrared coherent light-weight source as the elemental frequency source dependant on nonlinear tuning technology, making ultraviolet coherent radiation by multistage frequency conversion is thought to be an important solution to build the ultraviolet coherent gentle resource.
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We summarized The existing growth status of your significant-ability DUV laser both for the wavelength of FHG on the 1-μm laser and at 193 nm. The modern improvement with the sound-condition/fiber laser, as well as the nonlinear optical crystals, prompts not merely the average energy but will also the beam top quality (coherence) of your DUV lasers to an unprecedented degree.
The typical power from the NIR laser continue to has the possible to become improved to tens of watts which include 70 W [26] In the event the double-go configuration may be used for the Yb:YAG SCF amplifier stage. Consequently, In case the conversion performance of 31% from NIR to DUV could be nonetheless taken care of at this better power situation, the typical output ability of your DUV laser at 258 nm could be greater than twenty W, which might be described as a amazing electric power degree for your DUV laser and result in the unanticipated DUV laser machining outcomes. Moreover, for top-electric power DUV laser, the UV hurt in the nonlinear crystal, such as the windows for CLBO crystal as well as mirrors, is an additional important parameter for long-term and secure operation.
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Mainly because of the thermal lens influence while in the sound-point out lasers, Should the heating administration is insufficient, It is far from straightforward to acquire the reliable-point out laser by using a higher electric power as well as a significant beam high quality concurrently. Recently, with the development of The skinny disk laser and one-crystal fiber (SCF) laser, a large-energy laser at the fundamental wavelength (1 μm) were recognized with a great beam excellent In spite of a TEM00 method beam [four,24], which would be great candidates for the basic with the DUV laser technology. more info An additional applicant for the elemental is the higher-power fiber laser which can be realized by coherent beam mixture with M2 benefit below 1.
On the opposite side, the ability scaling from the NIR laser is an additional element to increase the average electricity with the 193-nm DUV laser. As a result of not enough the large-electric power amplification solution in the NIR laser (such as at 1553 nm), nonlinear frequency processes like optical parameter oscillation (OPO) may be placed on establish a wavelength converter by shifting the wavelength from one μm to the specified wavelength and getting relative larger ability [21]. Not too long ago, a diamond Raman laser confirmed its means in reaching a substantial ability and a large conversion effectiveness on the 1st Stokes on the 1-μm laser [22,23], which suggests the possibility for being utilized from the 193-nm DUV laser technology as a consequence of its significant Raman get and huge frequency shift.
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Also, combining the strong-condition laser with other nonlinear system for example stimulated Raman scattering, NIR lasers could be attained at new wavelengths with significant power and superior beam high quality, which was examined with the evidence-of-theory experiment. This Raman laser plan delivers a fresh path to the significant-ability DUV laser, especially at the wavelength of 193 nm.
The beam profile proven in Figure 7b demonstrated a fantastic beam quality as one of several deserves of Raman laser, which might be valuable to deliver a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as huge as that of KDP. CLBO crystals may be developed from your stoichiometric soften with decrease viscosity.
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