DUV lasers have a wide area of applications already. The ability to deliver lasers with variable power output will open new avenues.
DUV lasers have a wide area of applications already. The ability to deliver lasers with variable power output will open new avenues.Researchers at the Chinese Academy of Sciences have achieved the highest power output for 193 and 221 nm lasers generated using a lithium tri borate crystal.
This achievement sets the ground for more applications of this laser in the deep ultraviolet spectrum. Lasers in the DUV spectrum already have many applications in science and technology, such as defect inspection, spectroscopy, lithography, and metrology. Conventionally, the ArgonFluoride laser has been deployed to generate high-power 193 nanometer lasers used in applications such as lithography.However, these lasers are not completely coherent and, therefore, cannot be used in more sensitive applications like interference lithography – where fine features must be printed in an array. Such finer applications need a much more coherent laser and present an opportunity for researchers to build a hybrid excimer laser.To achieve the coherence demand, scientists have been toying with the idea of using a solid-state seed instead of a gas oscillator, making it a hybrid laser. In addition to improving the coherence, the design is also intended to improve the laser’s photon energy, allowing it to be used even with carbon compounds with minimal thermal impact. To achieve this, the linewidth of the 193-nm seed laser needed to be maintained below four Gigahertz . This is the coherence length that is crucial for interference as seen through the use ofResearchers at the Chinese Academy of Sciences achieved the same linewidth of a 193-nm hybrid excimer laser by using LBO crystals instead. The researchers used a sophisticated two-stage sum frequency generation process to achieve a 60 milliwatt laser output in their setup. The setup involved two lasers, one at 258 nm and one at 1553 nm. These lasers originated from a Yb-hybrid laser and an Er-doped fiber laser, respectively, and culminated in a 2mm×2mm×30mm Yb: YAG bulk crystal that delivered the desired laser output. The DUV laser thus generated had a pulse duration of 4.6 nanoseconds , a repetition rate of six kilohertz , and a linewidth of approximately 640 megahertz , the press release said. Noteworthy in this accomplishment is the 60mW power output of the 193 nm and its accompanying 221-nm counterpart laser, which is the highest generated using LBO crystals. The 27 percent efficiency for the 221 to 193 nm conversion and the three percent efficiency for the 258 to 193 nm conversion also set new benchmarks. the reported research demonstrates “the viability of pumping LBO with solid-state lasers for reliable and effective generation of narrow-linewidth laser at 193 nm, and opens a new way to fabricate a cost-effective, high-power DUV laser system using LBO.” The researchers are confident that LBO crystals can, therefore, be used to generate more DUV lasers with power output ranging from a few milliwatts to multiple watts, opening up further avenues for these wavelengths. Tesla to lay off 14,000 employees, Musk’s internal email reveals
Deutschland Neuesten Nachrichten, Deutschland Schlagzeilen
Similar News:Sie können auch ähnliche Nachrichten wie diese lesen, die wir aus anderen Nachrichtenquellen gesammelt haben.
Knotting laser beams surprisingly possible show Caltech scientistsUncover the secrets of tying knots in lasers. Find out how cutting-edge research is revolutionizing the possibilities of laser applications.
Weiterlesen »
Scientists harness the power of quantum dots to combat water pollutionThe team has been developing carbon- and sulfur-based quantum dots for environmental applications.
Weiterlesen »
Scientists find ideal laser power to kill hypersonic missiles — ChinaChinese researchers have found that lasers can strip the outer coating of hypersonic missiles, making them vulnerable to mid-air destruction.
Weiterlesen »
With living robots, scientists unlock cells' power to healNear the entrance to Michael Levin's lab at Tufts, four deer antlers are mounted on wooden boxes. They represent an incredible feat of regeneration in mammals: Deer shed their antlers annually and regrow the bone, blood vessels, nerves, and skin at a rate of half an inch per day.
Weiterlesen »
Scientists use laser light to achieve quantum states at room temperature, a firstA global team of researchers just proved that quantum states can be achieved at room temperature by magnetizing a nonmagnetic material.
Weiterlesen »
Scientists reveal wireless power transmission for lunar communicationA study proposes using satellites to wirelessly transmit power to the lunar far side, enabling future missions to the Moon's south pole.
Weiterlesen »