The best Side of CLBO Crystal
The best Side of CLBO Crystal
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We summarized The existing progress position of your substantial-energy DUV laser each on the wavelength of FHG from the 1-μm laser and at 193 nm. The latest progress of your strong-state/fiber laser, as well as the nonlinear optical crystals, prompts don't just the common electric power but will also the beam excellent (coherence) with the DUV lasers to an unprecedented level.
For illustration, The existing concave OC could be replaced by a airplane mirror which could mitigate the ability density around the floor of M1 along with the diamond. Furthermore, using superior problems threshold coatings for M1 and diamond would also improve the output electric power without any damages. Then, the NIR laser in the 2nd Stokes wavelength could be significant adequate, as well as its excellent beam quality, to make the ultimate DUV laser at 193 nm using a significant average electrical power.
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LBO is also a fantastic nonlinear crystal which is often placed on the SHG through the NIR into the environmentally friendly. The DUV laser is often understood by two stages of SFG during the LBO crystals because there isn't any section-matching angle for LBO to transform the inexperienced laser at 515 nm or 532 nm into the DUV straight by SHG [sixteen]. Not too long ago, the NSBBF crystal has also demonstrated its likely to get a substantial conversion effectiveness from 532 nm to 266 nm. The wander-off angle and deff from the NSBBF are Virtually similar to All those of CLBO [17].
On the other facet, the ability scaling in the NIR laser is an additional aspect to increase the common electricity in the 193-nm DUV laser. As a result of not enough the large-power amplification Remedy in the NIR laser (for example at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) could possibly be placed on develop a wavelength converter by shifting the wavelength from one μm to the specified wavelength and getting relative bigger electricity [21]. Recently, a diamond Raman laser confirmed its capacity in acquiring a superior ability as well as a superior conversion efficiency within the 1st Stokes of your one-μm laser [22,23], which means the chance to become used in the 193-nm DUV laser technology thanks to its significant Raman achieve and large frequency change.
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Its UV absorption edge reaches one hundred click here eighty nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as large as that of KDP. CLBO crystals is often developed in the stoichiometric soften with decreased viscosity.
The development in the 193-nm laser was demonstrated by stages of SFG. So as to scale the DUV laser electrical power efficiently, a brand new strategy from the 193-nm DUV laser era is introduced determined by the diamond Raman laser.