Fascination About KYW Crystal
Fascination About KYW Crystal
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This exceptional characteristic of ultrafast pulses permits nonlinear optical interaction with tissue at lower Total exposure, and drives apps including deep-tissue multiphoton microscopy and high-precision eye surgical procedures
We current a dual-crystal Yb:KGW laserthat iscapable to function being a Q-switched oscillator with output electric power nearly 24 W and pulse duration of twenty ns,or being a regenerative amplifier with output electricity approximately 21 W and pulse length below 200 fs just after compression of chirped pulses. Both lasers have exceptional beam high-quality with beam parameter M2
FIG. four. Autocorrelation function of the heartbeat 共a兲and spectrum 共b兲of the laser with a rectangular Energetic ingredient for an output electricity of seven-hundred mW. The width of
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 owning fiber output. To circumvent spectral narrowing through amplification plus the corresponding lengthening on the amplified pulse when it's compressed, a mix of two Yb:KYW crystals have been utilized, With all the spectral maxima from the amplification shifted relative to one another and with spectral profiling on the amplified radiation.
Right after air drying and subsequent cleansing using a cotton cloth soaked in Liquor, the movie surface more info area confirmed no indications of peeling or scratches.
FIG. one. Optical layout of the laser with direct pumping with the radiation of semiconductor injection lasers. LD is definitely an IPG Photonics laser diode with fiber output
Tungstates tend to get superior Raman coefficients (�?Raman scattering). Therefore, they are able to create important Raman achieve at moderate optical intensities. It is possible to utilize the laser crystal alone being a Raman converter.
For tungstates, the ytterbium doping concentration can be quite significant with out major quenching because the replaced ions have an incredibly similar ion radius, as well as the inter-ion distance is fairly big.
By substituting yttrium with ytterbium inside the crystal lattice of Yb:KYW as a result of equivalent sizes of such chemical components up to a hundred% of Yb-doping may be accomplished.
Whilst ytterbium-doped laser obtain media normally exhibit a small quantum defect, ytterbium-doped tungstates let for specially smaller values. Such as, a 1030-nm Yb:YAG laser would Ordinarily be pumped around 940 nm, Whilst Yb:KGW or Yb:KYW may very well be most successfully pumped all over 981 nm.
This tandem of attributes has much-achieving 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 home temperature had been calculated. The emission spectrum and life time with the 3 F 4 enthusiastic point out were being identified. Using regular and modified Judd–Ofelt theories, the intensity parameters as well as the radiative lifetimes had been calculated and excellent arrangement Together with the experimental benefits was received for the two theories.
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