Not known Facts About KGW Crystal
Not known Facts About KGW Crystal
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Former perform showed that the twin-crystal configuration can be employed to compensate to the thermal lensing result[
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly massive when compared with that of Yb:YAG. This enables for wide wavelength tunability and for Significantly shorter pulse durations from method-locked lasers. Values effectively beneath one hundred fs are reached with passive method locking.
Consequently There is certainly minimal freedom for optimizing the dispersion payment effect. Sub-200 fs pulses could be envisioned having a broader bandwidth seed enter. Thanks to the dual-crystal configuration, the laser cavity provides a close to diffraction restricted laser beam with M
Substitution of the Computer for an improved just one or simply a high-quality adjustment in the Personal computer orientation along with the utilized substantial voltage is necessary to avoid this phenomenon. A fast pulse picker can be employed to improve the nanosecond-scale contrast of the output major pulse.
Amplified pulses using an Strength higher than 2.five mJ might be expected by making use of a higher pump energy into the regenerative amplifier and which makes it perform with the saturation stage. The laser fluence of ~one J/cm2 around the dichroic mirrors is considered to be below the destruction threshold of higher-excellent dielectric-coated mirrors.
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The black line denotes the configuration While using the crystals positioned in a similar orientation, although the red line is beneath the configuration of crystals put in orthogonal orientation.
Thermal outcomes are drastically scaled-down in KGW. This along with the superior destruction threshold make the crystal a wonderful prospect for ability scaling. Evaluating Ba(NO3)2 and KGW for Raman application Ba(NO3)two are simpler in case of ns pulses and KGW �?in the event of ps pulses.
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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）
Because its discovery in 19701,two, the state with the art of supercontinuum (SC) technology in bulk stable-state elements has attained a high standard of maturity due to large progress of ultrafast laser sources and fundamental idea of the underlying Actual physical processes3,4. The complexity of Bodily effects underlying SC technology is unveiled within the framework of femtosecond filamentation, and that is a universal phenomenon arising from nonlinear propagation of femtosecond laser pulses in transparent materials5. In additional sensible phrases, the attainable spectral extent of SC radiation will depend on the material Homes, which include linear and nonlinear indexes of refraction and Power bandgap, which together with the laser wavelength outline the important power for self-focusing (that has to get exceeded for a lightweight filament to form) and clamping depth of a light filament (that is proportional on the get of multiphoton absorption), respectively.
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An illustration of these conduct is revealed in Fig. 7a. The character of spectral variations is highlighted in Fig. 7d, which shows how the SC spectrum on the lengthy-wavelength side shrinks considerably, from 1800 nm to 1450 nm, just just after 8 minutes of exposure time inside a stationary sample. LT crystal shown rather superior very long-term functionality: at pulse repetition prices of as much as 100 kHz no narrowing on either facet of your SC spectrum was detected. Having said that, immediate narrowing of your SC spectrum in LT crystal was noticed soon after the primary 5 minutes of operation when the heart beat repetition fee was set at 200 kHz (details not demonstrated). In contrast to the above products, BGO and GGG shown fantastic SC era performances with no spectral modifications at a pulse repetition rate of two hundred kHz, as attested by the time number of SC spectra in BGO and GGG, proven in Fig. 7b and c, respectively. Figure 7e and file outline equivalent designs of SC spectra at the start and at the conclusion of 1 hour-lasting measurement in both equally resources.