An Unbiased View of KYW Crystal
An Unbiased View of KYW Crystal
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The comparison with glasses is appropriate since the substantial attain bandwidth permits e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
Femtosecond laser based upon Yb:KYW crystals with suppression of spectral narrowing inside a regenerative amplifier by spectral profiling of the heart beat
FIG. four. Autocorrelation perform of the heart beat 共a兲and spectrum 共b兲of the laser with a rectangular active aspect for an output ability of seven hundred mW. The width of
Optical structure of a laser with direct pumping Using the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output in the radiation, WP is often a fifty percent-wave plate, CL is actually a collimating lens, FL is often a concentrating lens, AE is an Lively element created from an Yb:KYW crystal, DM is actually a spherical dichroic mirror, M1-M6 will be the cavity mirrors, OC would be the output mirror, and SAM is a semiconductor saturable-absorber mirror.
Just before the event of Nd:YAG, Nd3+:CaWO4 was a very important uncommon-earth-doped laser attain medium. It had been actually Utilized in the very first continually running crystal laser.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and therefore are used as lasing materials to make ultrashort (~ a hundred-two hundred fs) significant power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes working at 981 nm supports compact laser methods.
A substantial brightnessQ-switched oscillator and regenerative amplifier determined by a twin-crystal Yb:KGW laser
For tungstates, the ytterbium doping concentration can be here very large without having considerable quenching because the changed ions have an exceptionally similar ion radius, and the inter-ion distance is fairly large.
By substituting yttrium with ytterbium within the crystal lattice of Yb:KYW mainly because of the very similar dimensions of those chemical elements as many as one hundred% of Yb-doping may be achieved.
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