The smart Trick of KYW Crystal That No One is Discussing
The smart Trick of KYW Crystal That No One is Discussing
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is rather big when compared with that of Yb:YAG. This permits for wide wavelength tunability and for Significantly shorter pulse durations from method-locked lasers. Values very well down below 100 fs have already been reached with passive method locking.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison to its counterpart Yb:KGW, can be a impressive product that performs an important part in laser know-how. Its Key purpose will be to crank out ultrashort pulses of sunshine, spanning just some hundred femtoseconds.
time. Crystals of your compound melts congruently at 1007 oC, however melt crystallization of top of the range crystal is not possible as a consequence of stage transition at ~920 oC. The best seeded Option approach from
FIG. four. Autocorrelation operate of the pulse 共a兲and spectrum 共b兲of a laser with an oblong active element for an output electric power of 700 mW. The width of
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 of the radiation, WP is often a half-wave plate, CL can be a collimating lens, FL is really a concentrating lens, AE is an Energetic component produced from an Yb:KYW crystal, DM is actually a spherical dichroic mirror, M1-M6 will be the cavity mirrors, OC may be the output mirror, and SAM is a semiconductor saturable-absorber mirror.
The monoclinic crystal buildings brings about a pure birefringence, assisting to keep away from thermally induced polarization rotation and depolarization loss.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and they are applied as lasing resources to create ultrashort (~ a hundred-two hundred fs) higher power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes operating at 981 nm supports compact laser devices.
Tungstates have a tendency to own higher Raman coefficients (�?Raman scattering). For that reason, they are able to crank out considerable Raman gain at average optical intensities. It is feasible to utilize the laser crystal by itself for a Raman converter.
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... Not merely the placement of crystal while in the cavity and also the amplification axis of crystal influences the laser operation tremendously, because the absorption and emission cross sections from the crystal are fairly various in accordance with the orientation of your crystal.
The thermal read more conductivity of prevalent double tungstates is in the get to 3–four W/(K m) �?which isn't undesirable compared with other laser crystals (While a number of periods lower than for YAG), and rather large in comparison While using the thermal conductivity of common glasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) compared to its counterpart Yb:KGW, is really a exceptional materials that plays an essential role in laser engineering. Its Main function is to crank out ultrashort pulses of light, spanning just a few hundred femtoseconds.
Concurrently, a shorter laser wavelength could be obtained; it can be done to function by using a quantum defect effectively below 1%. As a consequence, the heat technology could be so small that this partly compensates the lower thermal conductivity.