The KYW Crystal Diaries
The KYW Crystal Diaries
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is actually a remarkable product that performs an essential position in laser technological know-how. Its primary perform is always to create ultrashort pulses of light, spanning only a few hundred femtoseconds.
Femtosecond laser determined by Yb:KYW crystals with suppression of spectral narrowing inside a regenerative amplifier by spectral profiling of the heartbeat
Color-coded reflectivity of the Bragg mirror to be a operate of wavelength and angle on the incident beam.
This paper describes a femtosecond laser regenerative amplifier dependant on two Yb:KYW crystals with direct longitudinal pumping by highly effective linear arrays of semiconductor injection lasers possessing fiber output. To stop spectral narrowing during amplification plus the corresponding lengthening in the amplified pulse when it is compressed, a combination of two Yb:KYW crystals were being utilised, with the spectral maxima with the amplification shifted relative to each other and with spectral profiling of the amplified radiation.
Soon after air drying and subsequent cleansing having a cotton cloth soaked in Liquor, the film floor confirmed no indications of peeling or scratches.
FIG. one. Optical layout of the laser with direct pumping with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
five mm apart from the middle with the beam caustic. So as to Check out the mode matching simulation, we executed the experiment with Ng-Minimize crystal oscillator, which was created Earlier and in a exact affliction with simulation [11]. As revealed in Figure three(b) with purple dots and line, the CW output electrical power is very depending on the situation of laser crystal as well as the experimental result coincides very well with simulation outcome. To be a Notice, multimode Procedure occurred in experiment if the sizing in the pump beam is much larger than TEM00 cavity manner and it leads to increased CW output ability within the displacement region beneath 3.five mm.
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By substituting yttrium with ytterbium inside the crystal lattice of Yb:KYW as a result of similar dimensions of these chemical components nearly a hundred% of Yb-doping might be attained.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) as compared to its counterpart Yb:KGW, is usually a extraordinary product that plays a crucial part in laser know-how. Its primary function should be to make ultrashort pulses of light, spanning just some hundred femtoseconds.
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