KYW Crystal - An Overview
KYW Crystal - An Overview
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The achieve bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly significant in contrast with that of Yb:YAG. This enables for broad wavelength tunability and for A great deal shorter pulse durations from mode-locked lasers. Values very well beneath 100 fs are already obtained with passive manner locking.
This one of a kind attribute of ultrafast pulses permits nonlinear optical interaction with tissue at reduced In general exposure, and drives programs such as deep-tissue multiphoton microscopy and significant-precision eye surgical procedures
time. Crystals from the compound melts congruently at 1007 oC, having said that melt crystallization of top of the range crystal is unachievable due to section transition at ~920 oC. The best seeded Alternative strategy from
FIG. 4. Autocorrelation function of the pulse 共a兲and spectrum 共b兲of the laser with an oblong active ingredient for an output electrical power of seven hundred mW. The width of
This paper describes a femtosecond laser regenerative amplifier according to two Yb:KYW crystals with immediate longitudinal pumping by potent linear arrays of semiconductor injection lasers having fiber output. To forestall spectral narrowing during amplification as well as the corresponding lengthening on the amplified pulse when it is actually compressed, a combination of two Yb:KYW crystals ended up made use of, Together with the spectral maxima on the amplification shifted relative to each other and with spectral profiling in the amplified radiation.
The monoclinic crystal structures leads to a organic birefringence, assisting to stay clear of thermally induced polarization rotation and depolarization reduction.
FIG. 1. Optical layout of the laser with direct pumping While using the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
Spatial composition in the beam as well as the corresponding intensity profiles I at the output of your laser.
For tungstates, the ytterbium doping focus can be extremely large with out important quenching because the changed ions have an incredibly very similar ion radius, and also the inter-ion length is fairly significant.
By substituting yttrium with ytterbium during the crystal lattice of Yb:KYW as a result of identical sizes of such chemical aspects as many as 100% of Yb-doping could possibly be obtained.
Although ytterbium-doped laser obtain media commonly show a small quantum defect, ytterbium-doped tungstates enable for specially compact values. For example, a 1030-nm Yb:YAG laser would Ordinarily be pumped about 940 nm, While Yb:KGW or Yb:KYW could be most effectively pumped close to 981 nm.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared to its counterpart Yb:KGW, is a extraordinary content that plays an essential job in laser technologies. Its primary functionality will be to make ultrashort pulses of sunshine, spanning get more info just some hundred femtoseconds.
At the same time, a shorter laser wavelength is often obtained; it is achievable to operate that has a quantum defect effectively down below 1%. To be a consequence, the warmth era could be so small that this partly compensates the lower thermal conductivity.