A Simple Key For KYW Crystal Unveiled
A Simple Key For KYW Crystal Unveiled
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The get bandwidth e.g. of Yb:KGW and Yb:KYW is rather substantial when compared with that of Yb:YAG. This permits for huge wavelength tunability and for A great deal shorter pulse durations from method-locked lasers. Values perfectly beneath 100 fs are actually reached with passive manner locking.
The comparison with glasses is acceptable since the substantial acquire bandwidth enables e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
The Yb:KYW crystal’s proficiency in light-weight absorption at all around 981 nm would make the crystal well suited for diode pumping. It is further Increased by its amazing performance in this method, coupled with its very low quantum defect.
FIG. four. Autocorrelation function of the pulse 共a兲and spectrum 共b兲of the laser with a rectangular Lively factor for an output electrical power of seven hundred mW. The width of
Optical format of a laser with immediate pumping Along with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output in the radiation, WP can be a half-wave plate, CL is a collimating lens, FL is often a concentrating lens, AE is undoubtedly an active factor made from an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 are classified as the cavity mirrors, OC is the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
Right after air drying and subsequent cleaning which has a cotton cloth soaked in Alcoholic beverages, the movie surface area confirmed no signs of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and they are applied as lasing elements to make ultrashort (~ one hundred-two hundred fs) high power pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes operating at 981 nm supports compact laser systems.
Tungstates tend to get large Raman coefficients (�?Raman scattering). Hence, they are able to create considerable Raman acquire at average optical intensities. It is possible to make use of the laser crystal itself like a Raman converter.
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By substituting yttrium with ytterbium inside the crystal lattice of Yb:KYW due to the equivalent measurements of those chemical aspects approximately a hundred% of Yb-doping can be achieved.
When ytterbium-doped laser obtain media frequently exhibit a small quantum defect, ytterbium-doped tungstates allow for for specifically compact values. As an example, a 1030-nm Yb:YAG laser would Commonly be pumped all over 940 nm, Whilst Yb:KGW or Yb:KYW could be most competently pumped around 981 nm.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison to its counterpart Yb:KGW, can be a impressive substance that performs an important function in laser technological know-how. Its Major operate is usually to crank out ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
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