Everything about KYW Crystal
Everything about KYW Crystal
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The comparison with glasses is acceptable Because the huge gain bandwidth makes it possible for e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
The Yb:KYW crystal’s proficiency in light-weight absorption at all-around 981 nm makes the crystal well matched for diode pumping. It is actually further more Improved by its outstanding performance in this method, coupled with its reduced quantum defect.
FIG. 4. Autocorrelation function of the pulse 共a兲and spectrum 共b兲of a laser with an oblong Lively factor for an output energy of seven-hundred mW. The width of
Optical structure of a laser with immediate pumping with the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output from the radiation, WP is usually a fifty percent-wave plate, CL is a collimating lens, FL can be a concentrating lens, AE is surely an Lively element constructed from an Yb:KYW crystal, DM is really a spherical dichroic mirror, M1-M6 tend to be the cavity mirrors, OC is the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
Adhesion Test Compliant with MIL-C-675C army requirements, an adhesion check involved implementing a tape that fulfills LT-90 specifications on to the lens film layer. The tape was affixed totally and after that eradicated vertically. This procedure was done three times, causing no blistering or peeling.
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Tungstates are inclined to acquire significant Raman coefficients (�?Raman scattering). Thus, they will make considerable Raman acquire at average optical intensities. It is achievable to use the laser crystal alone like a Raman converter.
For tungstates, the ytterbium doping concentration can be quite substantial without the need of significant quenching because the replaced ions have a really equivalent ion radius, along with the inter-ion distance is comparatively huge.
By substituting yttrium with ytterbium within the crystal lattice of Yb:KYW mainly because of the related sizes of those chemical elements approximately 100% of Yb-doping could be reached.
The thermal click here conductivity of widespread double tungstates is of the purchase to three–four W/(K m) �?which isn't poor when compared with other laser crystals (although numerous periods less than for YAG), and relatively massive as opposed with the thermal conductivity of common glasses.
Li2WO4-WO3 flux was successfully applied decreasing the growth temperature below 900 oC. In accordance with single crystal x-ray measurements, the crystal corresponds for the P2/n Area group.
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)two) crystal at place temperature had been measured. The emission spectrum and lifetime of your 3 F four psyched point out were being established. Making use of normal and modified Judd–Ofelt theories, the depth parameters as well as the radiative lifetimes had been calculated and great arrangement Along with the experimental outcomes was received for the two theories.
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