KYW Crystal Secrets
KYW Crystal Secrets
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In practical conditions, the Yb:KYW crystal has uncovered its specialized niche in significant-electric power laser applications due to its power to make large Vitality ultrashort laser pulses whilst maintaining a compact sizing. The interaction of its functions �?seamless ytterbium substitution, powerful absorption properties, ultrashort pulse era and efficiency in energy conversion �?positions the Yb:KYW crystal for a cornerstone while in the laser engineering, masking assorted fields ranging from scientific research to industrial apps.
This distinctive characteristic of ultrafast pulses permits nonlinear optical conversation with tissue at very low Over-all publicity, and drives purposes which include deep-tissue multiphoton microscopy and high-precision eye surgical treatment
time. Crystals in the compound melts congruently at 1007 oC, nonetheless soften crystallization of top quality crystal is not possible due to period transition at ~920 oC. The highest seeded Answer process from
FIG. 4. Autocorrelation functionality of the heartbeat 共a兲and spectrum 共b兲of the laser with a rectangular Lively factor for an output power of seven hundred mW. The width of
Ultrafast lasers, with pulse widths of some picoseconds (10−12 s) or considerably less, empower some time resolution required in laser-fired up fluorescence life time spectroscopy and imaging approaches.Moreover, they deliver higher pulse peak powers at large repetition costs and reasonable normal output powers.
Before the development of Nd:YAG, Nd3+:CaWO4 was a very important uncommon-earth-doped laser achieve medium. It absolutely was in reality used in the first continually working crystal laser.
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Tungstates are likely to have substantial Raman coefficients (�?Raman scattering). Hence, they are able to make sizeable Raman achieve at moderate optical intensities. It is possible to utilize the laser crystal alone as a Raman converter.
For tungstates, the ytterbium doping focus can be extremely large without having substantial quenching as the changed ions have an extremely similar ion radius, as well as inter-ion length is relatively significant.
By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW a result of the related sizes of these chemical things around 100% of Yb-doping can be obtained.
The thermal conductivity of popular double tungstates is with the purchase to 3–four W/(K m) �?which is not poor compared with other laser crystals (Whilst many instances lower than for YAG), and pretty big compared While using the thermal conductivity of normal glasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) as compared to its counterpart Yb:KGW, is usually a amazing substance that plays an essential function in laser technologies. Its primary functionality will be to make ultrashort pulses of light, spanning just some hundred femtoseconds.
Concurrently, a shorter laser wavelength may be acquired; it is achievable to work which has a quantum defect nicely beneath 1%. Being a consequence, the warmth technology is usually so small that this partly compensates the reduce thermal conductivity.