The Greatest Guide To KYW Crystal
The Greatest Guide To KYW Crystal
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The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared with its counterpart Yb:KGW, can be a extraordinary material that performs a significant role in laser technologies. Its Principal function is to deliver ultrashort pulses of light, spanning only a few hundred femtoseconds.
We current a twin-crystal Yb:KGW laserthat iscapable to work as being a Q-switched oscillator with output ability approximately 24 W and pulse size of 20 ns,or as a regenerative amplifier with output ability nearly 21 W and pulse duration underneath 200 fs just after compression of chirped pulses. The two lasers have fantastic beam excellent with beam parameter M2
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Optical format of the laser with immediate pumping with the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output of your radiation, WP is usually a 50 percent-wave plate, CL can be a collimating lens, FL is often a concentrating lens, AE is really an Lively component made from an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 are definitely the cavity mirrors, OC would be the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
The monoclinic crystal structures brings about a all-natural birefringence, helping to prevent thermally induced polarization rotation and depolarization decline.
FIG. one. Optical layout of a laser with immediate pumping Together with the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output
five mm in addition to the middle from the beam caustic. In order to Test the manner matching simulation, we done the experiment with Ng-cut crystal oscillator, which was formulated Formerly and in a very same affliction with simulation [eleven]. As revealed in Determine three(b) with red dots and line, the CW output energy is highly depending on the place of laser crystal along with the experimental result coincides effectively with simulation consequence. For a Take note, multimode Procedure occurred in experiment if the measurement with the pump beam is greater than TEM00 cavity method and it results in better CW output ability inside the displacement location beneath 3.five mm.
... at fifty percent-top were produced in a grasp oscillator with selfsynchronization of the axial modes, described inside our previously report. 21 The new edition in the laser, not like that explained inside our before short article, utilised an Yb:KYW crystal with the N pcut (optical axis N p with the index ellipsoid was parallel to the propagation path with the laser radiation), With all the polarization in the generated radiation directed along the N m axis.
By substituting yttrium with ytterbium from the crystal lattice of Yb:KYW a result of the very similar sizes of such chemical elements up to a hundred% of Yb-doping can be obtained.
Even though ytterbium-doped laser obtain media typically exhibit a small quantum defect, ytterbium-doped tungstates permit for notably compact values. One example is, a 1030-nm Yb:YAG laser would Typically be pumped around 940 nm, whereas Yb:KGW or Yb:KYW might be most effectively pumped about 981 nm.
Li2WO4-WO3 flux was correctly used lowering the growth temperature down below 900 oC. In keeping with single crystal x-ray measurements, the crystal corresponds on the P2/n space group.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison with its counterpart Yb:KGW, is a exceptional product that plays a vital purpose in laser technological KYW Crystal know-how. Its primary operate will be to create ultrashort pulses of light, spanning only a few hundred femtoseconds.
Simultaneously, a shorter laser wavelength might be acquired; it is feasible to work by using a quantum defect properly down below 1%. For a consequence, the heat generation might be so small that this partly compensates the decreased thermal conductivity.