The Definitive Guide to KGW Crystal
The Definitive Guide to KGW Crystal
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]. Mainly because of the small storage time, Ti:sapphire is typically pumped by frequency-doubled Nd:YAG or Nd:glass solid-state lasers, which results in a bulky and complex process with superior Charge. In contrast with typical CPA laser programs, the OPCPA technique can get hold of a shorter pulse period and a greater peak power.
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In summary, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are economical nonlinear elements for broadband SC technology inside the close to-infrared and shorter-wave infrared spectral ranges, when pumped by 180 fs elementary harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO produced two octave-spanning SC spectra, which Evaluate to SC spectra produced in YAG. These resources exhibit fairly related performances to YAG also in terms of threshold and ideal pump pulse energies for SC era. On the other hand, for what concerns the possibility to function at large laser pulse repetition level, YSO, LSO and LYSO exhibit long lasting Procedure only at 10 kHz and rapidly degrade (inside of a few minutes) at 20 kHz. Aside from the rather minimal SC technology threshold (169 nJ), GGG demonstrated outstanding effectiveness characteristics from the quick-wave infrared Using the optimal pump pulse Vitality of 464 nJ, and that is two occasions decreased than in YAG: the most important red-shifted spectral broadening and the best spectral Electricity density, outperforming KGW and YAG crystals in that factor.
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The comparison with Eyeglasses is suitable since the big get bandwidth lets e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
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The mixed attain is sophisticated and will be measured beneath distinct pumping circumstances due to the quasi-a few-stage technique conduct more info from the Yb-doped acquire medium. The blueshift, with a person peak from 1037 nm beneath the same crystal placement orientation to 1035 nm beneath the orthogonal crystal placement orientation, could outcome from your reabsorption losses at a long wavelength from the crystal exactly where the laser polarization is parallel to its Nm -axis, building the obtain at 1035 nm higher than that at 1037 nm below orthogonal orientation.
Thermal consequences are appreciably more compact in KGW. This together with the large damage threshold make the crystal a fantastic candidate for electricity scaling. Evaluating Ba(NO3)2 and KGW for Raman application Ba(NO3)2 are more effective in case of ns pulses and KGW �?in case of ps pulses.
The two-pump laser could provide up to a hundred and twenty W power. Roughly 60% of the maximum pump electricity was applied inside our experiment taking into consideration the small general performance of the dichroic mirrors. Below this dual-crystal configuration, our cavity supports a one hundred W pump electric power input, as talked about in Part 2.two. High-top quality dichroic mirrors will probably be applied Later on, and laser pulses are going to be stretched to a longer pulse duration.
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A multi-go primary amplifier will further more boost the Electricity to over 40 mJ. We are going to utilize cryogenically cooled Yb:KGW engineering to restrain the thermal outcome. Two phases of compression will probably be used soon after amplification. The main stage involves a typical Treacy-type compressor, and will compress the heart beat duration to under 300 fs by having an performance of somewhere around 70%. The next stage includes a gasoline-stuffed multi-move mobile[
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An example of this sort of conduct is demonstrated in Fig. 7a. The character of spectral variations is highlighted in Fig. 7d, which demonstrates how the SC spectrum within the long-wavelength facet shrinks substantially, from 1800 nm to 1450 nm, just soon after eight minutes of exposure time in a very stationary sample. LT crystal demonstrated rather far better very long-term functionality: at pulse repetition charges of approximately a hundred kHz no narrowing on both side from the SC spectrum was detected. Even so, quick narrowing of your SC spectrum in LT crystal was observed immediately after the first five minutes of Procedure when the pulse repetition level was set at 200 kHz (info not shown). In distinction to the above mentioned materials, BGO and GGG demonstrated superb SC era performances without any spectral variations at a pulse repetition charge of 200 kHz, as attested by the point number of SC spectra in BGO and GGG, shown in Fig. 7b and c, respectively. Determine 7e and file outline equivalent designs of SC spectra originally and at the end of one hour-Long lasting measurement in both equally resources.