The KYW Crystal Diaries
The KYW Crystal Diaries
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison with its counterpart Yb:KGW, is usually a exceptional product that plays a significant function in laser know-how. Its Most important operate would be to generate ultrashort pulses of light, spanning just a couple hundred femtoseconds.
Femtosecond laser depending on Yb:KYW crystals with suppression of spectral narrowing in a very regenerative amplifier by spectral profiling of the heart beat
The absorption and emission spectra of Yb:KYW Crystals Display screen strong peaks at 980 nm and 1030 nm, respectively, ensuring successful Electrical power conversion and high efficiency in laser systems.
This paper describes a femtosecond laser regenerative amplifier dependant on two Yb:KYW crystals with immediate longitudinal pumping by strong linear arrays of semiconductor injection lasers obtaining fiber output. To avoid spectral narrowing in the course of amplification as well as the corresponding lengthening of the amplified pulse when it is actually compressed, a mix of two Yb:KYW crystals had been used, While using the spectral maxima on the amplification shifted relative to each other and with spectral profiling of the amplified radiation.
In advance of the development of Nd:YAG, Nd3+:CaWO4 was a very important exceptional-earth-doped laser acquire medium. It absolutely was in actual fact Utilized in the 1st repeatedly operating crystal laser.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and so are utilised as lasing resources to create ultrashort (~ 100-two hundred fs) large energy pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser programs.
Tungstates are inclined to obtain high Raman coefficients (�?Raman scattering). As a result, they're able to make major Raman get at average optical intensities. It is achievable to make use of the laser crystal by itself to be a Raman converter.
For tungstates, the ytterbium doping focus can be quite high devoid read more of significant quenching since the changed ions have a really similar ion radius, and also the inter-ion length is pretty huge.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW due to related sizes of such chemical things approximately a hundred% of Yb-doping may be attained.
The thermal conductivity of frequent double tungstates is of your buy to three–4 W/(K m) �?which isn't negative as opposed with other laser crystals (although various periods below for YAG), and fairly massive as opposed With all the thermal conductivity of usual glasses.
This tandem of attributes has far-reaching implications, significantly in the construction of compact still powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at area temperature were being calculated. The emission spectrum and lifetime in the 3 F 4 energized condition ended up identified. Applying conventional and modified Judd–Ofelt theories, the depth parameters as well as radiative lifetimes had been calculated and superior settlement While using the experimental final results was acquired for equally theories.
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