KYW Crystal Secrets
KYW Crystal Secrets
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The comparison with glasses is appropriate Considering that the huge gain bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
We current a dual-crystal Yb:KGW laserthat iscapable to function being a Q-switched oscillator with output electricity as much as 24 W and pulse size of 20 ns,or as being a regenerative amplifier with output ability as much as 21 W and pulse period below 200 fs after compression of chirped pulses. Both equally lasers have great beam good quality with beam parameter M2
Shade-coded reflectivity of the Bragg mirror to be a operate of wavelength and angle from the incident beam.
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with immediate longitudinal pumping by powerful linear arrays of semiconductor injection lasers acquiring fiber output. To circumvent spectral narrowing throughout amplification as well as corresponding lengthening of the amplified pulse when it truly is compressed, a combination of two Yb:KYW crystals were being applied, Together with the spectral maxima from the amplification shifted relative to one another and with spectral profiling with the amplified radiation.
Soon after air drying and subsequent cleansing using a cotton fabric soaked in alcohol, the movie area showed no indications of peeling or scratches.
FIG. one. Optical structure of the laser with direct pumping While using the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output
five mm besides the center from the beam caustic. In order to Look at the method matching simulation, we performed the experiment with Ng-Slice crystal oscillator, which was produced Beforehand and in a same problem with simulation [eleven]. As shown in Figure three(b) with crimson dots and line, the CW output energy is very dependent on the posture of laser crystal along with the experimental outcome coincides perfectly with simulation end result. To be a Notice, multimode Procedure happened in experiment once the dimensions of the pump beam is more substantial than TEM00 cavity manner and it causes bigger CW output electrical power from the displacement region beneath 3.five mm.
For tungstates, the ytterbium doping concentration can be quite superior without having sizeable quenching as the replaced ions have an incredibly similar ion radius, along with the inter-ion length is pretty huge.
Even so, as soon as Nd3+:YAG became commercially offered, the fascination in CaWO4 dropped sharply. In later several years, particular other tungstate crystals began to bring in a lot of consideration.
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