Details, Fiction and KYW Crystal
Details, Fiction and KYW Crystal
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The acquire bandwidth e.g. of Yb:KGW and Yb:KYW is extremely huge in comparison with that of Yb:YAG. This permits for extensive wavelength tunability and for Considerably shorter pulse durations from method-locked lasers. Values effectively down below a hundred fs happen to be accomplished with passive mode locking.
The comparison with Eyeglasses is acceptable Considering that the large acquire bandwidth permits e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
time. Crystals from the compound melts congruently at 1007 oC, even so melt crystallization of top of the range crystal is extremely hard as a result of stage transition at ~920 oC. The highest seeded solution system from
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This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with immediate longitudinal pumping by effective linear arrays of semiconductor injection lasers getting fiber output. To prevent spectral narrowing through amplification as well as the corresponding lengthening of the amplified pulse when it can be compressed, a combination of two Yb:KYW crystals were being used, Together with the spectral maxima in the amplification shifted relative to one another and with spectral profiling on the amplified radiation.
The monoclinic crystal structures results in a purely natural birefringence, assisting to avoid thermally induced polarization rotation and depolarization loss.
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Tungstates are inclined to acquire high Raman coefficients (�?Raman scattering). Consequently, they could make major Raman attain at average optical intensities. It can be done to utilize the laser crystal alone to be a Raman converter.
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Nevertheless, at the time Nd3+:YAG became commercially readily available, the interest in CaWO4 dropped sharply. In later on several years, selected other tungstate crystals began to attract lots of more info focus.
Even though ytterbium-doped laser gain media normally exhibit a small quantum defect, ytterbium-doped tungstates allow for notably small values. By way of example, a 1030-nm Yb:YAG laser would Ordinarily be pumped close to 940 nm, Whilst Yb:KGW or Yb:KYW might be most successfully pumped around 981 nm.
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