Details, Fiction and KYW Crystal
Details, Fiction and KYW Crystal
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly big compared with that of Yb:YAG. This allows for wide wavelength tunability and for Considerably shorter pulse durations from mode-locked lasers. Values very well beneath a hundred fs have already been achieved with passive method locking.
This distinctive characteristic of ultrafast pulses enables nonlinear optical conversation with tissue at lower In general exposure, and drives applications such as deep-tissue multiphoton microscopy and higher-precision eye medical procedures
time. Crystals with the compound melts congruently at 1007 oC, having said that soften crystallization of top of the range crystal is difficult because of section transition at ~920 oC. The top seeded Alternative approach from
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Optical layout of a laser with direct pumping While using the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output from the radiation, WP is a half-wave plate, CL is usually a collimating lens, FL is actually a focusing lens, AE is an Energetic aspect produced from an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 are the cavity mirrors, OC is the output mirror, and SAM is often a semiconductor saturable-absorber mirror.
The monoclinic crystal buildings results in a natural birefringence, assisting to prevent thermally induced polarization rotation and depolarization loss.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and are applied as lasing materials to crank out ultrashort (~ a hundred-two hundred fs) substantial electric power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser units.
Spatial structure from the beam and the corresponding depth profiles I at the output more info of your laser.
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Nonetheless, at the time Nd3+:YAG became commercially obtainable, the fascination in CaWO4 dropped sharply. In later on many years, selected other tungstate crystals started to draw in a lot of notice.
Whilst ytterbium-doped laser acquire media commonly show a little quantum defect, ytterbium-doped tungstates make it possible for for notably smaller values. One example is, a 1030-nm Yb:YAG laser would Ordinarily be pumped all-around 940 nm, whereas Yb:KGW or Yb:KYW could possibly be most effectively pumped about 981 nm.
Li2WO4-WO3 flux was successfully used lowering The expansion temperature below 900 oC. As outlined by single crystal x-ray measurements, the crystal corresponds on the P2/n House team.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared with its counterpart Yb:KGW, is usually a amazing product that performs a very important job in laser technologies. Its Most important purpose should be to make ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
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