The KGW Crystal Diaries
The KGW Crystal Diaries
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]. Mainly because of the limited storage time, Ti:sapphire is often pumped by frequency-doubled Nd:YAG or Nd:glass reliable-point out lasers, which results in a bulky and complicated process with high Expense. When compared with standard CPA laser systems, the OPCPA technique can acquire a shorter pulse period and an increased peak electrical power.
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Later on, an investigation over the spectral attain curve of Yb:KGW in the most crucial amplifier will probably be performed below cryogenic temperature evolution from seventy seven K to three hundred K. The Performing temperature might be controlled to appreciate broader attain bandwidth and fewer change on the central wavelength of the primary amplifier.
For that reason There is certainly small flexibility for optimizing the dispersion compensation impact. Sub-200 fs pulses may be expected with a broader bandwidth seed enter. Due to the dual-crystal configuration, the laser cavity provides a close to diffraction minimal laser beam with M
The monoclinic crystal buildings results in a organic birefringence, helping to avoid thermally induced polarization rotation and depolarization loss.
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The other was positioned with its Np -axis parallel Together with the s-polarized way. A comparison was created in between a configuration While using the crystals positioned in a similar orientation (
In its elemental kind, gadolinium provides a silvery-white visual appeal. Gadolinium is often a uncommon earth or lanthanide element that possesses exceptional Attributes beneficial to specialised purposes for example semiconductor fabrication and nuclear reactor shielding. It's utilized for equally its significant magnetic minute (seven.94μ B) and in phosphors and scintillator crystals. When complexed with EDTA ligands, it can be applied being an injectable contrast agent for MRIs. The element is named once the Finnish chemist and geologist Johan Gadolin.
Ask RP Photonics for just about any advice relating to tungstate lasers, like femtosecond lasers and high-electrical power lasers.
The threshold Vitality for SC generation (hbox E _ textrm th ) was defined because the pump pulse Power, where the blue-shifted spectral broadening promptly settles to a certain Slice-off wavelength That continues to be Virtually constant even with additional improve with the pump pulse Electrical power. The optimum Electricity (hbox E _textrm decide ), was defined as being the pump pulse Electricity, which produces the largest purple-shifted spectral broadening before the onset of periodic modulation within the SC spectrum as a consequence of filament refocusing.
Even though BGO, GGG, YSO, LSO and LYSO occasionally serve as laser hosts37, They're primarily discovered as effective scintillators, whose scintillation Attributes are researched pretty well38. Having said that, the nonlinear optical Homes of such crystals and so their prospective to function nonlinear supplies for SC era especially, and some other experiments about nonlinear propagation of intense femtosecond laser pulses, continue being very badly analyzed. To date, GGG, LT23,25 and YSO24 have been only sketchily analyzed for SC technology with Ti:sapphire laser pumping, however, to the most effective of our awareness, none of the investigated components have been examined with Yb-laser pumping, especially for what concerns their performance at quite high (tens to countless kHz) pulse repetition charges.
KGW has a powerful Raman spectrum that extends from the ultraviolet to your close to infrared, which makes it helpful for A selection of applications. The crystal can be utilized like a reference materials for Raman spectroscopy, as well as a sample for studying Raman scattering inside the good condition.
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]. The twin-crystal read more configuration lowers the thermal load on Every crystal when sustaining a significant gain, and facilitates the compensation of each’s thermal lensing outcome. Consequently, the laser cavity can get the job done with a large balance array around the thermal lensing impact variation.