Top KYW Crystal Secrets
Top KYW Crystal Secrets
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly large in contrast with that of Yb:YAG. This enables for huge wavelength tunability and for A great deal shorter pulse durations from manner-locked lasers. Values nicely underneath a hundred fs have been realized with passive method locking.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison to its counterpart Yb:KGW, is usually a impressive material that plays a very important job in laser technologies. Its Main perform would be to produce ultrashort pulses of light, spanning just some hundred femtoseconds.
We present a dual-crystal Yb:KGW laserthat iscapable to operate as being a Q-switched oscillator with output electrical power around 24 W and pulse size of 20 ns,or being a regenerative amplifier with output electric power nearly 21 W and pulse period down below 200 fs following compression of chirped pulses. The two lasers have great beam top quality with beam parameter M2
The absorption and emission spectra of Yb:KYW Crystals Screen solid peaks at 980 nm and 1030 nm, respectively, making certain productive Electricity conversion and significant performance in laser systems.
This paper describes a femtosecond laser regenerative amplifier determined by two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers having fiber output. To prevent spectral narrowing all through amplification as well as corresponding lengthening on the amplified pulse when it really is compressed, a combination of two Yb:KYW crystals were applied, Together with the spectral maxima from the amplification shifted relative to one another and with spectral profiling in the amplified radiation.
After air drying and subsequent cleaning with a cotton cloth soaked in Alcoholic beverages, the movie surface area confirmed no indications of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have broad emission bandwidths and so are made use of as lasing products to produce ultrashort (~ a hundred-two hundred fs) superior energy pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes working at 981 nm supports compact laser programs.
Tungstates have a tendency to own significant Raman coefficients (�?Raman scattering). Therefore, they are able to create considerable Raman achieve at average optical intensities. It can be done to make use of the laser crystal itself as being a Raman converter.
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... Not simply the situation of crystal during the cavity but also the amplification axis of crystal impacts the laser operation tremendously, because the absorption and emission cross sections of the crystal are quite diverse based on the orientation on the crystal.
The thermal conductivity of common double tungstates is with the purchase to three–4 W/(K m) �?which is not bad in contrast with other laser crystals (Though several moments less than for YAG), and reasonably large when compared with the thermal conductivity of normal Eyeglasses.
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Simultaneously, a shorter laser wavelength may be attained; it is feasible to work that has a quantum defect effectively down below 1%. As a consequence, the heat technology could be so compact that this partly compensates the decreased thermal conductivity.