The get bandwidth e.g. of Yb:KGW and Yb:KYW is extremely substantial in contrast with that of Yb:YAG. This permits for vast wavelength tunability and for A great deal shorter pulse durations from manner-locked lasers. Values effectively underneath a hundred fs have already been attained with passive method locking.
The comparison with Eyeglasses is suitable For the reason that massive achieve bandwidth makes it possible for e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
The Yb:KYW crystal’s proficiency in gentle absorption at all over 981 nm tends to make the crystal well matched for diode pumping. It truly is even more Increased by its impressive performance in this method, coupled with its small quantum defect.
FIG. 4. Autocorrelation function of the heart beat 共a兲and spectrum 共b兲of the laser with a rectangular Lively component for an output ability of seven hundred mW. The width of
By substituting yttrium with ytterbium within the crystal lattice of Yb:KYW due to comparable sizes of these chemical elements around one hundred% of Yb-doping may very well be obtained. This unique attribute permits ytterbium to go ahead and take position of yttrium with pretty much no disruption to the crystal’s lattice.
Adhesion Test Compliant with MIL-C-675C navy criteria, an adhesion test involved applying a tape that meets LT-90 specs on to the lens movie layer. The tape was affixed read more absolutely and afterwards removed vertically. This process was carried out three times, resulting in no blistering or peeling.
FIG. 1. Optical structure of a laser with immediate pumping Together with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
Tungstates have a tendency to own superior Raman coefficients (�?Raman scattering). Thus, they will create important Raman get at reasonable optical intensities. It is achievable to make use of the laser crystal itself for a Raman converter.
For tungstates, the ytterbium doping focus can be very large without the need of substantial quenching because the replaced ions have an extremely comparable ion radius, along with the inter-ion length is comparatively huge.
High-electric power repetitively pulsed ytterbium lasers with supershort pulse width and direct diode pumping for technological and biomedical programs
The thermal conductivity of typical double tungstates is in the order to three–4 W/(K m) �?which isn't negative as opposed with other laser crystals (While many occasions a lot less than for YAG), and relatively large in contrast with the thermal conductivity of normal Eyeglasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared to its counterpart Yb:KGW, is often a extraordinary substance that performs a vital position in laser know-how. Its Principal perform would be to generate ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
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