The smart Trick of KGW Crystal That No One is Discussing

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For some purposes, tungstates offer you a combination of several useful Attributes. Specifically for passive mode locking, ytterbium-doped double tungstates are often excellent to other media when it comes to The mix of higher achieve bandwidth, huge cross-sections, and comparatively very good thermal Houses �?Although in Every single certain discipline greater supplies may be found.

The purple-shifted Portion of the SC is of practical significance, especially for what fears the overall performance of broadly tunable optical parametric amplifiers pumped by the elemental harmonics of Yb lasers. The lack of seed photons while in the long-wavelength region from the SC spectrum limitations the amplification effectiveness and brings about pulse-to-pulse energy fluctuations within the degeneracy location with the optical parametric amplifier. This element is quantified in Fig. 6a by plotting the SC spectra with regards to spectral Strength density, which was believed by measuring the Strength from the axial Element of SC radiation (that's the one virtually handy Section of SC emission). KGW crystal makes the highest spectral Power density in the 1200�?450 nm variety, as observed inside a latest study30.

In contrast, the seed laser can be amplified to about 1 mJ beneath the orthogonal orientation configuration.

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Another was positioned with its Np -axis parallel Using the s-polarized route. A comparison was produced between a configuration With all the crystals put in exactly the same orientation (

The black line denotes the configuration Together with the crystals put in the identical orientation, whilst the pink line is beneath the configuration of crystals put in orthogonal orientation.

Talk to RP Photonics for just about any assistance regarding tungstate lasers, including femtosecond lasers and superior-energy lasers.

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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）

Tungstates have a tendency to acquire large Raman coefficients (�?Raman scattering). Consequently, they could produce considerable Raman achieve at reasonable optical intensities. It can be done to make use of the laser crystal itself for a Raman converter.

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An illustration of this kind of conduct is shown in Fig. 7a. The character of spectral alterations is highlighted in Fig. 7d, which shows how the SC spectrum to the lengthy-wavelength aspect shrinks noticeably, from 1800 nm to 1450 nm, just right after eight minutes of publicity time inside a stationary sample. LT crystal demonstrated relatively far better extended-expression performance: at pulse repetition charges of approximately a hundred kHz no narrowing on possibly facet of the SC spectrum was detected. On the other hand, swift narrowing with the SC spectrum in LT crystal was observed right after the first five minutes of Procedure when the heartbeat repetition amount was set at two hundred kHz (facts not proven). In distinction to the above mentioned components, BGO and GGG shown fantastic SC generation performances with none spectral alterations in a pulse repetition amount of 200 kHz, as attested by the point series of SC spectra in BGO and GGG, demonstrated in Fig. 7b and c, respectively. Figure 7e and file outline similar designs website of SC spectra at the start and at the end of one hour-lasting measurement in both supplies.