New Step by Step Map For KYW Crystal
New Step by Step Map For KYW Crystal
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is rather substantial as opposed with that of Yb:YAG. This permits for broad wavelength tunability and for much shorter pulse durations from method-locked lasers. Values perfectly below a hundred fs are actually realized with passive method locking.
The comparison with glasses is appropriate Considering that the large get bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
time. Crystals of the compound melts congruently at 1007 oC, however melt crystallization of top of the range crystal is unachievable because of section changeover at ~920 oC. The best seeded Resolution method from
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Optical layout of a laser with immediate pumping While using the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output from the radiation, WP is often a 50 percent-wave plate, CL is a collimating lens, FL is often a focusing lens, AE can be an Lively aspect created from an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 will be the cavity mirrors, OC is the output mirror, and SAM is often a semiconductor saturable-absorber mirror.
The monoclinic crystal structures leads to a pure birefringence, assisting to steer clear of thermally induced polarization rotation and depolarization reduction.
FIG. one. Optical format check here of a laser with immediate pumping with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
Tungstates tend to possess high Raman coefficients (�?Raman scattering). Hence, they can make substantial Raman acquire at moderate optical intensities. It is possible to use the laser crystal itself as a Raman converter.
For tungstates, the ytterbium doping concentration can be extremely substantial without the need of sizeable quenching as the replaced ions have an extremely comparable ion radius, and also the inter-ion length is comparatively huge.
Substantial-ability repetitively pulsed ytterbium lasers with supershort pulse width and direct diode pumping for technological and biomedical applications
Whilst ytterbium-doped laser acquire media commonly exhibit a little quantum defect, ytterbium-doped tungstates enable for specifically small values. By way of example, a 1030-nm Yb:YAG laser would Generally be pumped close to 940 nm, While Yb:KGW or Yb:KYW might be most successfully pumped about 981 nm.
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The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at room temperature have been calculated. The emission spectrum and life span of your 3 F 4 enthusiastic condition had been established. Using normal and modified Judd–Ofelt theories, the intensity parameters plus the radiative lifetimes were calculated and superior arrangement Along with the experimental final results was attained for both of those theories.
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