Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The comparison with glasses is acceptable For the reason that huge attain bandwidth lets e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
We existing a dual-crystal Yb:KGW laserthat iscapable to function as a Q-switched oscillator with output electricity up to 24 W and pulse size of twenty ns,or as a regenerative amplifier with output electricity nearly 21 W and pulse duration beneath two hundred fs immediately after compression of chirped pulses. The two lasers have excellent beam high-quality with beam parameter M2
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This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with direct longitudinal pumping by effective linear arrays of semiconductor injection lasers having fiber output. To forestall spectral narrowing for the duration of amplification along with the corresponding lengthening in the amplified pulse when it's compressed, a mix of two Yb:KYW crystals had been made use of, Together with the spectral maxima of the amplification shifted relative to each other and with spectral profiling in the amplified radiation.
The monoclinic crystal constructions leads to a pure birefringence, assisting to steer clear of thermally induced polarization rotation and depolarization reduction.
FIG. one. Optical format of the laser with direct pumping with the radiation of semiconductor injection lasers. LD can be an IPG Photonics laser diode with fiber output
Spatial framework from the beam as well as corresponding depth profiles I for the output with the laser.
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By substituting yttrium with ytterbium while in the crystal lattice of Yb:KYW because of the equivalent measurements of those chemical here features up to 100% of Yb-doping might be reached.
The thermal conductivity of popular double tungstates is with the buy to 3–4 W/(K m) �?which isn't lousy as opposed with other laser crystals (Whilst various periods under for YAG), and rather big when compared Together with the thermal conductivity of regular glasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared to its counterpart Yb:KGW, is really a impressive materials that performs a very important function in laser know-how. Its Most important operate is always to make ultrashort pulses of light, spanning just some hundred femtoseconds.
At the same time, a shorter laser wavelength is often acquired; it is feasible to function having a quantum defect very well beneath 1%. As being a consequence, the warmth generation is often so little this partly compensates the reduced thermal conductivity.