New Step by Step Map For KYW Crystal
New Step by Step Map For KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared with its counterpart Yb:KGW, is usually a amazing substance that performs a significant job in laser technology. Its primary function would be to crank out ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
Femtosecond laser based upon Yb:KYW crystals with suppression of spectral narrowing in a regenerative amplifier by spectral profiling of the heart beat
FIG. 4. Autocorrelation purpose of the pulse 共a兲and spectrum 共b兲of the laser with an oblong active ingredient for an output electricity of seven-hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers possessing fiber output. To forestall spectral narrowing during amplification and also the corresponding lengthening of the amplified pulse when it is actually compressed, a combination of two Yb:KYW crystals had been used, While using the spectral maxima in the amplification shifted relative to one another and with spectral profiling in the amplified radiation.
Immediately after air drying and subsequent cleaning by using a cotton fabric soaked in alcohol, the movie area showed no indications of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and they are applied as lasing elements to make ultrashort (~ 100-two hundred fs) large energy pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes working at 981 nm supports compact laser systems.
five mm in addition to the middle in the beam caustic. As a way to Verify the manner matching simulation, we carried out the experiment with Ng-Reduce crystal oscillator, which was developed Earlier and in a identical affliction with simulation [11]. As shown in Determine three(b) with crimson dots and line, the CW output power is very dependent on the position of laser crystal plus the experimental outcome coincides properly with simulation end result. Like a Observe, multimode operation occurred in experiment once the sizing in the pump beam is more substantial than TEM00 cavity mode and it triggers better CW output energy while in the displacement region down below 3.five mm.
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... Don't just the position of crystal within the cavity but additionally the amplification axis of crystal influences the laser Procedure considerably, since the absorption and emission cross sections on the crystal are very distinct according to the orientation of the crystal.
The thermal conductivity of frequent double tungstates is of the buy to three–4 W/(K m) �?which isn't website poor compared with other laser crystals (Whilst various occasions a lot less than for YAG), and pretty massive compared With all the thermal conductivity of regular Eyeglasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared with its counterpart Yb:KGW, can be a exceptional substance that plays an essential function in laser technologies. Its Main functionality will be to make ultrashort pulses of light, spanning just a couple hundred femtoseconds.
Concurrently, a shorter laser wavelength might be obtained; it can be done to function with a quantum defect very well below one%. As being a consequence, the warmth generation is usually so tiny this partly compensates the reduced thermal conductivity.