KYW Crystal Secrets
KYW Crystal Secrets
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is rather big in comparison with that of Yb:YAG. This permits for large wavelength tunability and for A lot shorter pulse durations from method-locked lasers. Values properly underneath a hundred fs have been accomplished with passive method locking.
This exceptional characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at small Over-all exposure, and drives applications such as deep-tissue multiphoton microscopy and substantial-precision eye surgical procedure
The Yb:KYW crystal’s proficiency in light-weight absorption at all over 981 nm will make the crystal well matched for diode pumping. It is further more Improved by its exceptional effectiveness in this method, coupled with its small quantum defect.
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This paper describes a femtosecond laser regenerative amplifier according to two Yb:KYW crystals with immediate longitudinal pumping by impressive linear arrays of semiconductor injection lasers acquiring fiber output. To forestall spectral narrowing for the duration of amplification as well as the corresponding lengthening from the amplified pulse when it is actually compressed, a mix of two Yb:KYW crystals had been used, While using the spectral maxima on the amplification shifted relative to each other and with spectral profiling of your amplified radiation.
Ahead of the event of Nd:YAG, Nd3+:CaWO4 was a vital uncommon-earth-doped laser get medium. It was the truth is Employed in the first repeatedly functioning crystal laser.
FIG. 1. Optical structure of a laser with immediate pumping Together with the radiation of semiconductor injection lasers. LD is definitely an IPG Photonics laser diode with fiber output
five mm in addition to the middle in the beam caustic. As a way to Verify the manner matching simulation, we done the experiment with Ng-Minimize crystal oscillator, which was produced previously As well as in a identical condition with simulation [eleven]. As shown in Determine 3(b) with red dots and line, the CW output power is extremely depending on the placement of laser crystal and also the experimental consequence coincides effectively with simulation final result. Like a Take note, multimode operation transpired in experiment in the event the dimension with the pump beam is bigger than TEM00 cavity method and it results in greater CW output electricity during the displacement area beneath three.5 mm.
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... Not just the place of crystal while in the cavity and also the amplification axis of crystal influences the laser operation drastically, since the absorption and emission cross sections in the crystal are rather unique based on the orientation in the crystal.
The thermal conductivity of typical double tungstates is of your purchase to three–4 W/(K m) �?which read more isn't poor as opposed with other laser crystals (Despite the fact that several periods lower than for YAG), and rather big in comparison With all the thermal conductivity of regular Eyeglasses.
This tandem of characteristics has far-reaching implications, significantly in the construction of compact nevertheless powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at space temperature have been calculated. The emission spectrum and life span of the 3 F 4 enthusiastic condition were being identified. Utilizing normal and modified Judd–Ofelt theories, the intensity parameters along with the radiative lifetimes ended up calculated and fantastic settlement While using the experimental results was attained for both of those theories.
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