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Yb:KYW crystal is an excellent laser gain material and are used as a lasing materials to generate ultrashort high power pulses. Yb:KYW can be used as ultrashort pulses amplifiers too. It is one of the best materials for high power thin disk lasers. Its broad spectral emission band 1023-1060nm allows the generation of ultrashort(80 -200 fs) high power pulses. Its wide absorption spectrum at 981 nm and high absorption of pump radiation allow an efficient use of diode laser pumping.Yb: KYW has the advantage of larger absorption cross section, which decreases the minimum pump intensity necessary to achieve transparency in the quasi-two-level system of ytterbium.
Basic Properties :
Crystal structure monoclinic Yb3+ concentration 0.5-100% Point group C2/c Cell Parameters a=8.13Å;b= 10.36 Å; c = 7.59 Å; β=94.26° Melting Point: 1045℃ Density, g/cm3 6.61 Mohs hardness 4-5 Transmission range 350–5500 nm Lasing Wavelength 1023-1060nm Absorption band 981nm(FWHM 8nm) Absorption cross section 1.33×10-19cm2 Stimulated emission cross section (E║a) 3×10-20cm2 Fluorescent lifetime 0.6ms (10% doping)
Specifications of Yb:KYW :
Orientation [010], Nm axis is parallel to input/output faces Standard Dopant concentration (at. %) 10% Maximum length 20mm Size tolerance, mm ±0.1 Parallelism 10″ Flatness λ/10@633nm Perpendicularity < 10' Surface quality 10/5 (MIL-PRF-13830B)
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