The Definitive Guide to KYW Crystal
The Definitive Guide to KYW Crystal
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is rather big as opposed with that of Yb:YAG. This allows for wide wavelength tunability and for Substantially shorter pulse durations from mode-locked lasers. Values nicely beneath 100 fs have been achieved with passive manner locking.
The comparison with glasses is suitable For the reason that significant gain bandwidth permits e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
The Yb:KYW crystal’s proficiency in light absorption at around 981 nm makes the crystal well matched for diode pumping. It is actually further more Increased by its amazing effectiveness in this process, coupled with its small quantum defect.
FIG. 4. Autocorrelation perform of the heartbeat 共a兲and spectrum 共b兲of a laser with an oblong Energetic factor for an output power of seven hundred mW. The width of
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW because of the similar measurements of these chemical factors nearly a hundred% of Yb-doping may very well be accomplished. This exceptional characteristic permits ytterbium to take the position of yttrium with practically no disruption on the crystal’s lattice.
Adhesion Take a look at Compliant with MIL-C-675C military services benchmarks, an adhesion take a look at included implementing a tape that satisfies LT-ninety technical specs onto the lens film layer. The tape was affixed entirely and after that removed vertically. This process was carried out three times, leading to no blistering or peeling.
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Tungstates are likely to get higher Raman coefficients (�?Raman scattering). Consequently, they can crank out major Raman get at moderate optical intensities. It can be done to make use of the laser crystal by itself for a Raman converter.
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By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW a read more result of the very similar measurements of such chemical features as many as a hundred% of Yb-doping can be realized.
The thermal conductivity of typical double tungstates is of the buy to 3–4 W/(K m) �?which isn't terrible compared with other laser crystals (While quite a few periods fewer than for YAG), and pretty significant as opposed While using the thermal conductivity of normal Eyeglasses.
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Concurrently, a shorter laser wavelength can be attained; it is possible to work that has a quantum defect very well down below one%. Like a consequence, the heat technology is often so smaller this partly compensates the decreased thermal conductivity.