New Step by Step Map For KYW Crystal
New Step by Step Map For KYW Crystal
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is rather substantial compared with that of Yb:YAG. This enables for vast wavelength tunability and for Substantially shorter pulse durations from mode-locked lasers. Values nicely under 100 fs happen to be reached with passive mode locking.
The comparison with glasses is appropriate Because the huge attain bandwidth lets e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
time. Crystals on the compound melts congruently at 1007 oC, having said that soften crystallization of top quality crystal is extremely hard on account of section changeover at ~920 oC. The best seeded Alternative strategy from
The absorption and emission spectra of Yb:KYW Crystals Show robust peaks at 980 nm and 1030 nm, respectively, making certain effective Electricity conversion and high functionality in laser methods.
This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with immediate longitudinal pumping by potent linear arrays of semiconductor injection lasers possessing fiber output. To forestall spectral narrowing throughout amplification plus the corresponding lengthening from the amplified pulse when it's compressed, a combination of two Yb:KYW crystals ended up utilized, with the spectral maxima of your amplification shifted relative to one another and with spectral profiling in the amplified radiation.
In advance of the development of Nd:YAG, Nd3+:CaWO4 was an important exceptional-earth-doped laser get medium. It was the truth is Employed in the initial consistently operating crystal laser.
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A significant brightnessQ-switched oscillator and regenerative amplifier according to a twin-crystal Yb:KGW laser
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... Not just the posture of crystal in the cavity but additionally the amplification axis of crystal affects the laser Procedure drastically, since the absorption and emission cross sections with the crystal are fairly distinctive in accordance with the orientation with the crystal.
The thermal conductivity of typical double tungstates is read more from the buy to three–4 W/(K m) �?which isn't undesirable in comparison with other laser crystals (although several situations lower than for YAG), and quite large compared Along with the thermal conductivity of typical Eyeglasses.
Li2WO4-WO3 flux was efficiently utilized minimizing The expansion temperature below 900 oC. In keeping with single crystal x-ray measurements, the crystal corresponds into the P2/n Place team.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) as compared to its counterpart Yb:KGW, is really a exceptional substance that performs a very important position in laser technological innovation. Its Key function will be to make ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
At the same time, a shorter laser wavelength might be received; it can be done to work using a quantum defect nicely beneath one%. Like a consequence, the heat generation can be so smaller that this partly compensates the reduced thermal conductivity.