The best Side of KGW Crystal
The best Side of KGW Crystal
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Along with its use like a Raman crystal, KGW can also be used in other optical purposes, for instance in laser programs and as a scintillator in clinical imaging.
], but it will incorporate considerably more Price tag to this component. The intra-cavity spectral gain curve might be modulated by inserting an etalon that cuts down the actual attain for the wavelength with the maximum achieve issue[
]. Etalon insertion would result in more loss, having said that, time-to-time optimization would introduce the risk of ingredient hurt and instability into the technique. A nonlinear regenerative amplifier could instantly provide pulses by using a duration as low as ninety seven fs in addition to a spectral bandwidth of 19 nm[
Nevertheless, as soon as Nd3+:YAG grew to become commercially readily available, the desire in CaWO4 dropped sharply. In later on several years, selected other tungstate crystals started to appeal to plenty of interest.
Lastly, we investigated the extensive-expression performances of SC generation in crystal samples below best pumping ailments at greater laser repetition prices. In doing this, the crystal samples weren't translated and held inside a stationary posture with respect on the pump beam over the full measurement. The illustrations illustrating sturdy very long-phrase performances of SC era in KGW and YAG crystals at significant laser repetition charges could be discovered elsewhere. More exclusively, steady efficiency of KGW crystal at two MHz pulse repetition rate less than quite similar pump beam website concentrating geometry was described recently30, While YAG crystal shown secure overall performance for a number of hours at two hundred kHz pulse repetition price Despite having very limited focusing on the pump beam (NA=0.085)32. The extended-term performance assessments in LSO, LYSO and YSO exposed gradual narrowing on the SC spectra within the very long-wavelength aspect that occurred soon after a specific publicity time and could be attributed into the optical degradation of those supplies. As an illustration, in LSO, the onset of spectral narrowing was noticed just after (sim twenty) minutes at a laser repetition level of 10 kHz, though in a laser repetition fee of 20 kHz, steady SC era general performance was observed just for roughly 2 min.
Question RP Photonics for any assistance about tungstate lasers, such as femtosecond lasers and substantial-power lasers.
The two-pump laser could provide as many as one hundred twenty W ability. Somewhere around sixty% of the most pump power was applied within our experiment taking into consideration the minimal functionality of your dichroic mirrors. Below this twin-crystal configuration, our cavity supports a 100 W pump electrical power enter, as mentioned in Segment 2.two. Superior-quality dichroic mirrors will probably be employed in the future, and laser pulses will be stretched to an extended pulse length.
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）
A multi-move major amplifier will further more Increase the Strength to higher than 40 mJ. We'll implement cryogenically cooled Yb:KGW technologies to restrain the thermal result. Two phases of compression might be made use of just after amplification. The very first phase involves a common Treacy-type compressor, and could compress the heartbeat length to underneath 300 fs using an performance of around 70%. The 2nd phase will involve a gas-stuffed multi-pass cell[
The scattered photons have another wavelength and Electricity as opposed to incident photons, which produces a Raman spectrum.
KGW crystals are utilised as Raman scattering products simply because they have potent Raman scattering at a variety of various wavelengths. When a laser beam is directed onto the crystal, the photons from the laser beam interact with the crystal lattice, leading to a lot of the photons to scatter in a different route.