Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW may be very big when compared with that of Yb:YAG. This permits for wide wavelength tunability and for A great deal shorter pulse durations from mode-locked lasers. Values properly down below a hundred fs happen to be attained with passive method locking.
The comparison with glasses is appropriate since the large attain bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
The Yb:KYW crystal’s proficiency in mild absorption at all over 981 nm would make the crystal well suited for diode pumping. It truly is even further Increased by its exceptional effectiveness in this process, coupled with its lower quantum defect.
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This paper describes a femtosecond laser regenerative amplifier dependant on two Yb:KYW crystals with immediate longitudinal pumping by strong linear arrays of semiconductor injection lasers possessing fiber output. To stop spectral narrowing throughout amplification as well as the corresponding lengthening from the amplified pulse when it is compressed, a mix of two Yb:KYW crystals had been made use of, Along with the spectral maxima in the amplification shifted relative to one another and with spectral profiling from the amplified radiation.
After air drying and subsequent cleaning which has a cotton cloth soaked in Liquor, the movie surface area confirmed no indications of peeling or scratches.
FIG. 1. Optical structure of a laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output
five mm aside from the center of the beam caustic. To be able to Check out the method matching simulation, we carried out the experiment with Ng-Slash crystal oscillator, which was formulated Formerly As well as in a similar problem with simulation [eleven]. As demonstrated in Figure 3(b) with red dots more info and line, the CW output electric power is highly depending on the place of laser crystal and the experimental consequence coincides effectively with simulation final result. Like a Be aware, multimode Procedure occurred in experiment once the dimensions from the pump beam is much larger than TEM00 cavity manner and it leads to increased CW output ability within the displacement area under three.5 mm.
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By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW due to related sizes of such chemical aspects around a hundred% of Yb-doping may very well be attained.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) compared to its counterpart Yb:KGW, is usually a extraordinary substance that performs a significant purpose in laser know-how. Its Principal perform would be to deliver ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
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