Little Known Facts About KGW Crystal.
Little Known Facts About KGW Crystal.
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Determine 7 shows the calculated dispersion payment outcome. The compressed pulse length is about 185 fs if the duration of input pulses is 150 fs. The discrepancy between them is going to be considerably minimized with a longer pulse enter since uncompensated significant-get dispersion issues a lot less for more time pulses. This configuration was utilized to demonstrate the compressibility of our amplified pulses at the preliminary phase of our entire technique. In the future we would adopt a grating-pair compressor for fine compensation for prime-order dispersion.
-switched mode. The bandwidth while in the orthogonal orientation was Plainly Substantially broader. The calculated Fourier remodel constrained pulse length was as limited as sub-a hundred and sixty fs. Under the configuration the place the two crystals ended up positioned in the exact same orientation, Along with the seed input, the amplified pulse bandwidth was only 3 nm with 180 μJ Vitality when it broke the dichroic mirrors.
Amplified pulses with an Power over 2.five mJ can be envisioned by implementing a greater pump electricity into the regenerative amplifier and which makes it do the job in the saturation degree. The laser fluence of ~one J/cm2 to the dichroic mirrors is thought to become beneath the damage threshold of superior-good quality dielectric-coated mirrors.
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KGW (potassium gadolinium tungstate) is really a crystal that is commonly made use of to be a Raman crystal in Raman spectroscopy. It is just a colorless, transparent crystal that includes a high Raman scattering efficiency and a powerful Raman spectrum, making it ideal for A variety of Raman applications.
We program to spice up the heart beat energy to previously mentioned forty mJ in two-phase multi-move amplifiers, comparable to a gain component of twenty. In Each individual amplifier, we will even adopt two cascaded crystals positioned less than orthogonal orientation to reduce the thermal load on Each and every crystal and compensate for that achieve-narrowing influence.
The 2-pump laser could provide nearly a hundred and twenty W check here ability. Somewhere around 60% of the most pump ability was applied within our experiment thinking about the low functionality of the dichroic mirrors. Beneath this twin-crystal configuration, our cavity supports a a hundred W pump power input, as talked about in Portion 2.2. Large-excellent dichroic mirrors will probably be employed Sooner or later, and laser pulses might be stretched to an extended pulse period.
相关工作得到了上海扬帆计划、国家重点研发计划、中国科学院战略性先导科技专项、国家自然科学基金项目、上海市优秀学术/技术带头人计划、上海市市级科技重大专项、中国科学院青年创新促进会的支持。（强场激光物理国家重点实验室供稿）
The Yb:KGW laser process includes a quasi-a few-degree habits. The net achieve of your Yb:KGW crystal wasn't higher: various tens of roundtrips were needed to amplify the nanojoule seed into a millijoule stage. Consequently, the obtain-narrowing effect was inevitable in Yb:KGW regenerative amplifiers.
Determine four Beam radius variation on The 2 crystals while switching the focal length in the thermal lensing influence.
KGW crystals are utilized as Raman scattering materials as they have solid Raman scattering in a range of various wavelengths. Every time a laser beam is directed onto the crystal, the photons from the laser beam communicate with the crystal lattice, creating a few of the photons to scatter in another course.