KGW Crystal Can Be Fun For Anyone
KGW Crystal Can Be Fun For Anyone
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In the future, an investigation around the spectral obtain curve of Yb:KGW in the principle amplifier will be executed less than cryogenic temperature evolution from seventy seven K to three hundred K. The Functioning temperature might be managed to comprehend broader obtain bandwidth and less change on the central wavelength of the most crucial amplifier.
Simultaneously, a shorter laser wavelength might be attained; it is feasible to function by using a quantum defect properly under 1%. Like a consequence, the heat generation may be so little this partly compensates the decreased thermal conductivity.
], but it might insert far more Expense to this part. The intra-cavity spectral achieve curve can be modulated by inserting an etalon that reduces the actual acquire in the wavelength with the maximum obtain issue[
Before the development of Nd:YAG, Nd3+:CaWO4 was an important uncommon-earth-doped laser gain medium. It had been in fact Employed in the initial repeatedly operating crystal laser.
On the other hand, as soon as Nd3+:YAG grew to become commercially readily available, the curiosity in CaWO4 dropped sharply. In afterwards yrs, particular other tungstate crystals started to bring in many interest.
The combined get is complicated and may be calculated less than diverse pumping conditions as a result of quasi-three-amount method habits on the Yb-doped gain medium. The blueshift, with a person peak from 1037 nm under the identical crystal placement orientation to 1035 nm beneath the orthogonal crystal placement orientation, could result click here from your reabsorption losses at a protracted wavelength while in the crystal where by the laser polarization is parallel to its Nm -axis, making the acquire at 1035 nm larger than that at 1037 nm beneath orthogonal orientation.
We program to boost the heart beat Electricity to previously mentioned 40 mJ in two-phase multi-pass amplifiers, similar to a achieve issue of twenty. In Just about every amplifier, we may even undertake two cascaded crystals positioned beneath orthogonal orientation to decrease the thermal load on Every single crystal and compensate to the achieve-narrowing influence.
Figure 4 Beam radius variation on The 2 crystals though switching the focal size with the thermal lensing effect.
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）
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The scattered photons have a different wavelength and Strength than the incident photons, which generates a Raman spectrum.
Both energies are marked from the dashed lines and their values are labeled within the plots. The identical functions had been also observed in KGW and YAG crystals, whose spectral broadening dynamics are shown for any comparison in Fig. 4.