KYW Crystal Secrets
KYW Crystal Secrets
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is very big when compared with that of Yb:YAG. This permits for huge wavelength tunability and for Substantially shorter pulse durations from manner-locked lasers. Values properly down below one hundred fs are already reached with passive method locking.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, as compared to its counterpart Yb:KGW, is really a impressive material that plays a significant role in laser technological innovation. Its Key function is usually to crank out ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
Femtosecond laser depending on Yb:KYW crystals with suppression of spectral narrowing in the regenerative amplifier by spectral profiling of the pulse
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This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with direct longitudinal pumping by powerful linear arrays of semiconductor injection lasers possessing fiber output. To stop spectral narrowing for the duration of amplification and also the corresponding lengthening with the amplified pulse when it really is compressed, a combination of two Yb:KYW crystals ended up utilized, Along with the spectral maxima from the amplification shifted relative to one another and with spectral profiling of the amplified radiation.
Soon after air drying and subsequent cleaning that has a cotton fabric soaked in alcohol, the movie area showed no signs of peeling or scratches.
FIG. one. Optical structure of a laser with direct pumping Using the radiation of semiconductor injection lasers. LD is definitely an IPG Photonics laser diode with fiber output
Tungstates tend to get substantial Raman coefficients (�?Raman scattering). Thus, they can produce considerable Raman achieve at reasonable optical intensities. It is feasible to make use of the laser crystal by itself being a Raman converter.
... at 50 %-peak were being created inside of a grasp oscillator with selfsynchronization with the axial modes, described within our before post. 21 The get more info new edition of your laser, as opposed to that explained inside our earlier write-up, made use of an Yb:KYW crystal with the N pcut (optical axis N p in the index ellipsoid was parallel to your propagation direction in the laser radiation), Along with the polarization of the generated radiation directed alongside the N m axis.
Even so, the moment Nd3+:YAG turned commercially available, the interest in CaWO4 dropped sharply. In later a long time, specified other tungstate crystals began to bring in loads of notice.
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Li2WO4-WO3 flux was properly used lessening The expansion temperature down below 900 oC. According to single crystal x-ray measurements, the crystal corresponds towards the P2/n Area group.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at room temperature ended up measured. The emission spectrum and life span from the three F 4 excited condition were decided. Using common and modified Judd–Ofelt theories, the depth parameters as well as the radiative lifetimes were being calculated and excellent settlement With all the experimental effects was obtained for equally theories.
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