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In the future, an investigation within the spectral acquire curve of Yb:KGW in the principle amplifier will probably be carried out below cryogenic temperature evolution from 77 K to three hundred K. The Performing temperature are going to be managed to appreciate broader gain bandwidth and fewer change at the central wavelength of the key amplifier.

The pink-shifted part of the SC is of realistic importance, specifically for what fears the overall performance of broadly tunable optical parametric amplifiers pumped by the basic harmonics of Yb lasers. The lack of seed photons inside the prolonged-wavelength region from the SC spectrum restrictions the amplification performance and results in pulse-to-pulse Electrical power fluctuations within the degeneracy area of your optical parametric amplifier. This component is quantified in Fig. 6a by plotting the SC spectra in terms of spectral Electricity density, which was estimated by measuring the energy with the axial Portion of SC radiation (which is the sole basically practical Section of SC emission). KGW crystal generates the highest spectral Electrical power density from the 1200�?450 nm vary, as famous inside of a current study30.

], but it might include far more cost to this ingredient. The intra-cavity spectral acquire curve can be modulated by inserting an etalon that decreases the particular achieve for the wavelength with the utmost obtain factor[

Just before the development of Nd:YAG, Nd3+:CaWO4 was a very important rare-earth-doped laser gain medium. It absolutely was in reality Employed in the 1st constantly running crystal laser.

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KGW (potassium gadolinium tungstate) is usually a crystal that is often employed as being a Raman crystal in Raman spectroscopy. It is a colorless, clear crystal which has a higher Raman scattering performance and a strong Raman spectrum, which makes it ideal for a range of Raman purposes.

]. This method was dependant on The reality that the spectral emission cross-portion curves vary from each other when laser polarization is paralleled to different optical axis of Yb-doped double tungstates[

Figure 4 Beam radius variation on The 2 crystals although modifying the focal length from the thermal lensing effect.

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An illustration of this kind of conduct is revealed in Fig. 7a. The character of spectral modifications is highlighted in Fig. 7d, which displays how the SC spectrum over the lengthy-wavelength aspect shrinks substantially, from 1800 nm to 1450 nm, just soon after eight minutes of exposure time in a stationary sample. LT crystal demonstrated rather greater very long-phrase general performance: at pulse repetition premiums of as many as a hundred kHz no narrowing on possibly side in the SC spectrum was detected. However, fast narrowing with the SC spectrum in LT crystal was noticed soon after the initial 5 minutes of Procedure when the heartbeat repetition charge was set at two hundred kHz (facts not demonstrated). In contrast to the above mentioned products, BGO and GGG shown exceptional SC generation performances with no spectral modifications in a pulse repetition rate of 200 kHz, as attested by the point number of SC spectra in BGO and GGG, proven in Fig. 7b and c, respectively. Determine 7e and f outline similar styles of SC spectra at first and at the conclusion of 1 hour-lasting measurement in equally materials.