Getting My KYW Crystal To Work
Getting My KYW Crystal To Work
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We present a dual-crystal Yb:KGW laserthat iscapable to operate as being a Q-switched oscillator with output electrical power approximately 24 W and pulse size of 20 ns,or as being a regenerative amplifier with output energy nearly 21 W and pulse period down below 200 fs just after compression of chirped pulses. Equally lasers have exceptional beam top quality with beam parameter M2
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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 obtaining fiber output. To avoid spectral narrowing for the duration of amplification plus the corresponding lengthening on the amplified pulse when it truly is compressed, a combination of two Yb:KYW crystals were applied, With all the spectral maxima from the amplification shifted relative to one another and with spectral profiling in the amplified radiation.
Right before the development of Nd:YAG, Nd3+:CaWO4 was an important scarce-earth-doped laser obtain medium. It had been in fact used in the 1st continuously working crystal laser.
FIG. 1. Optical structure of a laser with immediate pumping Together with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
five mm besides the center on the beam caustic. So as to Check out get more info the manner matching simulation, we executed the experiment with Ng-Lower crystal oscillator, which was developed Formerly and in a exact situation with simulation [11]. As proven in Determine 3(b) with red dots and line, the CW output energy is very dependent on the position of laser crystal plus the experimental outcome coincides perfectly with simulation end result. To be a Be aware, multimode Procedure happened in experiment once the dimensions of the pump beam is larger sized than TEM00 cavity mode and it brings about bigger CW output energy inside the displacement region beneath 3.5 mm.
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... Not merely the place of crystal in the cavity and also the amplification axis of crystal has an effect on the laser Procedure enormously, as the absorption and emission cross sections in the crystal are quite unique in accordance with the orientation of the crystal.
The thermal conductivity of frequent double tungstates is of your purchase to three–four W/(K m) �?which isn't undesirable in contrast with other laser crystals (Whilst numerous situations below for YAG), and quite huge as opposed With all the thermal conductivity of normal Eyeglasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison to its counterpart Yb:KGW, is a extraordinary product that performs a vital position in laser know-how. Its Key operate is always to produce ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
Simultaneously, a shorter laser wavelength may be attained; it is feasible to work by using a quantum defect well under one%. Being a consequence, the heat era can be so smaller that this partly compensates the decreased thermal conductivity.