Fascination About KYW Crystal
Fascination About KYW Crystal
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This one of a kind attribute of ultrafast pulses enables nonlinear optical interaction with tissue at minimal Total publicity, and drives purposes such as deep-tissue multiphoton microscopy and high-precision eye operation
Femtosecond laser depending on Yb:KYW crystals with suppression of spectral narrowing in a regenerative amplifier by spectral profiling of the heart beat
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This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with direct longitudinal pumping by impressive linear arrays of semiconductor injection lasers possessing fiber output. To prevent spectral narrowing through amplification and also the corresponding lengthening of your amplified pulse when it's compressed, a combination of two Yb:KYW crystals were being employed, with the spectral maxima on the amplification shifted relative to each other and with spectral profiling on the amplified radiation.
Following air drying and subsequent cleansing with a cotton cloth soaked in Alcoholic beverages, the film floor confirmed no signs of peeling or scratches.
FIG. one. Optical format of a laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
Tungstates have a tendency to acquire superior Raman coefficients (�?Raman scattering). Consequently, they could crank out sizeable Raman gain at moderate optical intensities. It is possible to use the laser crystal itself as being a Raman converter.
For tungstates, the ytterbium doping focus can be quite higher without considerable quenching because the changed ions have an extremely comparable ion radius, as well as inter-ion distance read more is relatively substantial.
... Not merely the position of crystal during the cavity and also the amplification axis of crystal influences the laser operation enormously, since the absorption and emission cross sections in the crystal are very different based on the orientation in the crystal.
When ytterbium-doped laser obtain media normally exhibit a small quantum defect, ytterbium-doped tungstates allow for particularly smaller values. One example is, a 1030-nm Yb:YAG laser would Usually be pumped all around 940 nm, whereas Yb:KGW or Yb:KYW can be most successfully pumped around 981 nm.
This tandem of characteristics has far-reaching implications, notably in the development of compact however powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at home temperature were measured. The emission spectrum and lifetime from the 3 F 4 enthusiastic state had been decided. Applying conventional and modified Judd–Ofelt theories, the depth parameters and the radiative lifetimes ended up calculated and very good agreement With all the experimental results was attained for equally theories.
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