KYW Crystal - An Overview
KYW Crystal - An Overview
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The gain bandwidth e.g. of Yb:KGW and Yb:KYW is very big in contrast with that of Yb:YAG. This allows for wide wavelength tunability and for A lot shorter pulse durations from method-locked lasers. Values properly below 100 fs happen to be achieved with passive method locking.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, as compared to its counterpart Yb:KGW, is really a remarkable content that performs a vital role in laser engineering. Its Key function is always to crank out ultrashort pulses of sunshine, spanning only a few hundred femtoseconds.
We present a twin-crystal Yb:KGW laserthat iscapable to work being a Q-switched oscillator with output electrical power as many as 24 W and pulse size of twenty ns,or as being a regenerative amplifier with output electric power approximately 21 W and pulse duration down below 200 fs following compression of chirped pulses. Both lasers have great beam top quality with beam parameter M2
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This paper describes a femtosecond laser regenerative amplifier based on two Yb:KYW crystals with direct longitudinal pumping by potent linear arrays of semiconductor injection lasers acquiring fiber output. To prevent spectral narrowing during amplification plus the corresponding lengthening from the amplified pulse when it is compressed, a combination of two Yb:KYW crystals have been utilized, Together with the spectral maxima in the amplification shifted relative to one another and with spectral profiling from the amplified radiation.
Right after air drying and subsequent cleansing having a cotton fabric soaked in Liquor, the movie surface area showed no indications of peeling or scratches.
FIG. one. Optical format of a laser with direct pumping Together with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
Spatial structure of the beam and also the corresponding intensity profiles I at the output of the laser.
... at fifty percent-top were being produced inside of a master oscillator with selfsynchronization in the axial modes, explained in our previously short article. 21 The new edition from the laser, compared with that explained in our earlier short article, click here used an Yb:KYW crystal using an N pcut (optical axis N p with the index ellipsoid was parallel to the propagation path on the laser radiation), with the polarization from the produced radiation directed alongside the N m axis.
Nevertheless, when Nd3+:YAG grew to become commercially readily available, the desire in CaWO4 dropped sharply. In afterwards years, particular other tungstate crystals started to appeal to a great deal of awareness.
While ytterbium-doped laser achieve media typically show a small quantum defect, ytterbium-doped tungstates make it possible for for specially modest values. Such as, a 1030-nm Yb:YAG laser would Typically be pumped all-around 940 nm, whereas Yb:KGW or Yb:KYW may very well be most effectively pumped all over 981 nm.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) as compared to its counterpart Yb:KGW, is a extraordinary substance that plays a crucial function in laser technologies. Its Main functionality will be to make ultrashort pulses of light, spanning just some hundred femtoseconds.
Inquire RP Photonics for virtually any suggestions concerning tungstate lasers, which include femtosecond lasers and superior-ability lasers.