KYW Crystal - An Overview
KYW Crystal - An Overview
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, compared to its counterpart Yb:KGW, is actually a impressive substance that performs a very important job in laser technology. Its primary purpose should be to deliver ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
The Yb:KYW crystal’s proficiency in light-weight absorption at about 981 nm can make the crystal well suited for diode pumping. It really is even further Increased by its remarkable efficiency in this process, coupled with its reduced quantum defect.
FIG. 4. Autocorrelation purpose of the pulse 共a兲and spectrum 共b兲of the laser with an oblong active aspect for an output electrical power of seven hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with immediate longitudinal pumping by highly effective linear arrays of semiconductor injection lasers acquiring fiber output. To avoid spectral narrowing for the duration of amplification along with the corresponding lengthening in the amplified pulse when it's compressed, a mix of two Yb:KYW crystals have been utilized, with the spectral maxima on the amplification shifted relative to one another and with spectral profiling from the amplified radiation.
After air drying and subsequent cleaning with a cotton cloth soaked in Alcoholic beverages, the film floor confirmed no signs of peeling or scratches.
FIG. one. Optical layout of the laser with immediate pumping Along with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
five mm aside from the center of the beam caustic. In order to Look at the method matching simulation, we carried out the experiment with Ng-Reduce crystal oscillator, which was developed Earlier and in a same affliction with simulation [11]. As revealed in Figure three(b) with crimson dots and line, the CW output power is extremely dependent on the situation of laser crystal along with the experimental result coincides very well with simulation outcome. For a Be aware, multimode Procedure happened in experiment when the measurement of the pump beam is greater than TEM00 cavity manner and it causes larger CW output electric power in the displacement region under three.5 mm.
For tungstates, the ytterbium doping focus can be very substantial with out major quenching as the replaced ions have an incredibly identical ion radius, as well as the inter-ion distance is fairly significant.
Having said that, as soon as Nd3+:YAG became commercially obtainable, the curiosity in CaWO4 dropped sharply. In later on many years, specified other tungstate crystals began to catch the attention of a lot of attention.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison with its counterpart Yb:KGW, is actually a impressive content that plays a vital part in laser technological innovation. Its Major perform is to deliver ultrashort click here pulses of light, spanning just a few hundred femtoseconds.
Concurrently, a shorter laser wavelength might be obtained; it can be done to function having a quantum defect well underneath 1%. To be a consequence, the heat technology could be so small that this partly compensates the reduce thermal conductivity.