Little Known Facts About KGW Crystal.
Little Known Facts About KGW Crystal.
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Even though ytterbium-doped laser acquire media generally exhibit a small quantum defect, ytterbium-doped tungstates allow for for specially little values. For example, a 1030-nm Yb:YAG laser would Commonly be pumped around 940 nm, whereas Yb:KGW or Yb:KYW may be most successfully pumped all around 981 nm.
The gain bandwidth e.g. of Yb:KGW and Yb:KYW is quite large when compared with that of Yb:YAG. This enables for wide wavelength tunability and for Considerably shorter pulse durations from mode-locked lasers. Values effectively below one hundred fs happen to be realized with passive mode locking.
The very first two peaks can be affiliated with luminescence of pure material59, though the remaining peaks can be attributed to your luminescence of unknown dopants, although the provider specified the sample as undoped. The luminescence of YAG crystal makes sturdy UV luminescence having a maximum intensity at 300 nm, which happens to be attributed to blended self-trapped exciton and antisite defect-associated emissions60. At last, no luminescence while in the UV, visible and around-IR was observed in KGW and LT crystals, at the least throughout the detection array of fiber spectrometer (two hundred�?00 nm).
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For tungstates, the ytterbium doping concentration can be quite high with no significant quenching since the changed ions have a very equivalent ion radius, as well as inter-ion length is relatively massive.
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We prepare to spice up the heart beat energy to over 40 mJ in two-stage multi-go amplifiers, corresponding to a gain aspect of 20. In Each and every amplifier, we may even adopt two cascaded crystals positioned below orthogonal orientation to lessen the thermal load on Each and every crystal and compensate to the obtain-narrowing impact.
The two-pump laser could give approximately 120 W electric power. Roughly sixty% of the utmost pump ability was applied within our experiment contemplating the very low overall performance with the dichroic mirrors. Less than this dual-crystal configuration, our cavity supports a one hundred W pump electrical power enter, as talked over in Section 2.2. Large-excellent dichroic mirrors will be utilized Later on, and laser pulses might be stretched to an extended pulse duration.
Although BGO, GGG, YSO, LSO and LYSO once in a while serve as laser hosts37, These are mainly determined as efficient scintillators, whose scintillation Qualities are studied rather well38. Nevertheless, the nonlinear optical Houses of such crystals and so their possible to serve as nonlinear resources for SC technology especially, and any other experiments regarding nonlinear propagation of intensive femtosecond laser pulses, continue being pretty improperly read more studied. To date, GGG, LT23,twenty five and YSO24 were only sketchily analyzed for SC technology with Ti:sapphire laser pumping, having said that, to the best of our knowledge, Not one of the investigated resources ended up examined with Yb-laser pumping, especially for what considerations their efficiency at extremely high (tens to many hundreds of kHz) pulse repetition fees.
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