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The Yb:KYW crystal’s proficiency in light absorption at all-around 981 nm would make the crystal well suited for diode pumping. It is further Improved by its outstanding performance in this method, coupled with its small quantum defect.

FIG. four. Autocorrelation purpose of the pulse 共a兲and spectrum 共b兲of a laser with an oblong Lively ingredient for an output ability of 700 mW. The width of

Optical layout of the laser with direct pumping With all the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output on the radiation, WP is a 50 %-wave plate, CL is a collimating lens, FL is often a focusing lens, AE is an Energetic ingredient constructed from an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 are definitely the cavity mirrors, OC will be the output mirror, and SAM is a semiconductor saturable-absorber mirror.

The monoclinic crystal constructions ends in a pure birefringence, assisting to avoid thermally induced polarization rotation and depolarization loss.

PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and therefore are employed as lasing resources to crank out ultrashort (~ a hundred-two hundred fs) substantial electric power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes working at 981 nm supports compact laser devices.

A superior brightnessQ-switched oscillator and regenerative amplifier based upon a dual-crystal Yb:KGW laser

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Even so, the moment Nd3+:YAG turned commercially out there, the interest in CaWO4 dropped sharply. In afterwards years, particular other tungstate crystals started to appeal to a great deal of consideration.

When ytterbium-doped laser attain media typically show a small quantum defect, ytterbium-doped tungstates allow for significantly tiny values. For example, a 1030-nm Yb:YAG laser would Ordinarily be pumped close to 940 nm, While Yb:KGW or Yb:KYW could possibly be most competently pumped close to 981 nm.

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Simultaneously, a shorter laser wavelength is usually obtained; it is feasible to work with a quantum defect properly down below one%. As a consequence, the heat technology might be so smaller this partly compensates the reduce thermal conductivity.