The KYW Crystal Diaries
The KYW Crystal Diaries
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This exclusive characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at minimal All round exposure, and drives apps such as deep-tissue multiphoton microscopy and high-precision eye surgical procedures
time. Crystals with the compound melts congruently at 1007 oC, even so melt crystallization of top of the range crystal is extremely hard as a result of period changeover at ~920 oC. The highest seeded solution process from
Color-coded reflectivity of the Bragg mirror for a perform of wavelength and angle of the incident beam.
This paper describes a femtosecond laser regenerative amplifier based upon two Yb:KYW crystals with immediate longitudinal pumping by strong linear arrays of semiconductor injection lasers acquiring fiber output. To circumvent spectral narrowing throughout amplification along with the corresponding lengthening in the amplified pulse when it can be compressed, a mix of two Yb:KYW crystals had been made use of, With all the spectral maxima with the amplification shifted relative to one another and with spectral profiling of the amplified radiation.
Just before the event of Nd:YAG, Nd3+:CaWO4 was an important unusual-earth-doped laser get medium. It absolutely was in reality Utilized in the very first consistently working crystal laser.
FIG. one. Optical layout of the laser with direct pumping While using the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
five mm aside from the center of your beam caustic. So that you can Test the method matching simulation, we done the experiment with Ng-Reduce crystal oscillator, which was developed Beforehand and in a exact affliction with simulation [11]. As demonstrated in Figure three(b) with crimson dots and line, the CW output power is extremely depending on the placement of laser crystal and the experimental end result coincides well with simulation outcome. For a Notice, multimode Procedure occurred in experiment once the sizing from the pump beam is much larger than TEM00 cavity manner and it leads to larger CW output ability from the displacement location below 3.5 mm.
... at fifty percent-top were created in the master oscillator with selfsynchronization of your axial modes, explained in our before post. 21 The new version of your laser, contrary to that described inside our previously article, applied an Yb:KYW crystal using an N pcut (optical axis N p from the index ellipsoid was parallel into the propagation route of the laser radiation), Along with the polarization from the created radiation directed alongside the N m axis.
... Not only the position of crystal inside the cavity but in addition the amplification axis of crystal impacts the laser operation significantly, because the absorption and emission cross sections of the crystal are really distinct according to the orientation of the crystal.
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This tandem of attributes has significantly-achieving implications, get more info specifically in the development of compact yet powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at place temperature were being calculated. The emission spectrum and life span from the 3 F four energized point out were being identified. Applying standard and modified Judd–Ofelt theories, the depth parameters as well as radiative lifetimes were being calculated and superior settlement Along with the experimental benefits was acquired for each theories.
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