Everything about KYW Crystal
Everything about KYW Crystal
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is very substantial in contrast with that of Yb:YAG. This allows for vast wavelength tunability and for Substantially shorter pulse durations from mode-locked lasers. Values perfectly below 100 fs are actually obtained with passive manner locking.
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We existing a twin-crystal Yb:KGW laserthat iscapable to operate for a Q-switched oscillator with output energy approximately 24 W and pulse duration of 20 ns,or being a regenerative amplifier with output power as many as 21 W and pulse duration beneath two hundred fs immediately after compression of chirped pulses. Equally lasers have superb beam excellent with beam parameter M2
FIG. 4. Autocorrelation perform of the heart beat 共a兲and spectrum 共b兲of a laser with a rectangular Energetic element for an output ability of seven-hundred mW. The width of
Optical format of the laser with direct pumping Together with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output of the radiation, WP can be a 50 percent-wave plate, CL is often a collimating lens, FL is really a focusing lens, AE can be an active factor made out of an Yb:KYW crystal, DM is a spherical dichroic mirror, M1-M6 are definitely the cavity mirrors, OC may be the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
Ahead of the development of Nd:YAG, Nd3+:CaWO4 was a vital unusual-earth-doped laser gain medium. It had been in actual fact Utilized in the main consistently operating crystal laser.
Raman, luminescence and transmission spectra expose optical capabilities owing into the presence of thulium ions, and so the materials could be even more examined inside the scope of laser and luminescence programs.
Tungstates have a tendency to own higher Raman coefficients (�?Raman scattering). As a result, they're able to create significant Raman get at average optical intensities. It can be done to use the laser crystal alone to be a Raman converter.
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By substituting yttrium with ytterbium in the crystal lattice of Yb:KYW a result of the identical measurements of such chemical elements nearly a hundred% of Yb-doping might be reached.
Even though ytterbium-doped laser acquire media frequently exhibit a small quantum defect, ytterbium-doped tungstates allow for particularly smaller values. For instance, a 1030-nm Yb:YAG laser would Commonly be pumped all-around 940 nm, Whilst Yb:KGW or Yb:KYW may be most competently pumped all over 981 nm.
This tandem of characteristics has considerably-achieving implications, specifically in the construction of compact but powerfull lasers.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at home temperature were calculated. The emission spectrum and life span with the three F four fired up point out have been determined. Working with conventional and modified Judd–Ofelt theories, the intensity parameters along with the radiative lifetimes had been calculated and excellent agreement Together with the experimental success was acquired for both theories.
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