The Definitive Guide to KYW Crystal
The Definitive Guide to KYW Crystal
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In realistic phrases, the Yb:KYW crystal has discovered its niche in significant-power laser apps due to its capacity to produce higher Strength ultrashort laser pulses whilst sustaining a compact dimension. The interaction of its capabilities �?seamless ytterbium substitution, solid absorption qualities, ultrashort pulse generation and effectiveness in Power conversion �?positions the Yb:KYW crystal like a cornerstone from the laser engineering, covering numerous fields ranging from scientific research to industrial applications.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, in comparison to its counterpart Yb:KGW, is really a outstanding substance that plays a crucial part in laser know-how. Its Most important purpose is usually to deliver ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
We existing a twin-crystal Yb:KGW laserthat iscapable to operate as being a Q-switched oscillator with output electric power nearly 24 W and pulse length of 20 ns,or to be a regenerative amplifier with output electric power as many as 21 W and pulse duration beneath 200 fs after compression of chirped pulses. Equally lasers have outstanding beam top quality with beam parameter M2
Colour-coded reflectivity of the Bragg mirror to be a perform of wavelength and angle on the incident beam.
Optical layout of a laser with immediate pumping with the radiation of semiconductor injection lasers. LD is definitely an IPG Photonics laser diode with fiber output from the radiation, WP is really a half-wave plate, CL is a collimating lens, FL is a concentrating lens, AE can be an Lively component created from an Yb:KYW crystal, DM can be a spherical dichroic mirror, M1-M6 tend to be the cavity mirrors, OC is definitely the output mirror, and SAM is a semiconductor saturable-absorber mirror.
The monoclinic crystal structures results in a all-natural birefringence, helping to keep away from thermally induced polarization rotation and depolarization reduction.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and they are made use of as lasing products to generate ultrashort (~ a hundred-two hundred fs) superior ability pulses. Immediate pump of Yb:KGW/KYW crystals with laser diodes functioning at 981 nm supports compact laser devices.
5 mm besides the center with the beam caustic. As a way to Test the mode matching simulation, we done the experiment with Ng-cut crystal oscillator, which was formulated Beforehand and in a very same condition with simulation [11]. As demonstrated in Determine 3(b) with purple dots and line, the CW output electrical power is extremely dependent on the placement of laser crystal and the experimental end result coincides perfectly with simulation outcome. For a note, multimode operation transpired in experiment in the event the size click here in the pump beam is larger sized than TEM00 cavity mode and it triggers better CW output ability from the displacement region under 3.5 mm.
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By substituting yttrium with ytterbium inside the crystal lattice of Yb:KYW because of the equivalent dimensions of those chemical components around a hundred% of Yb-doping may very well be obtained.
While ytterbium-doped laser acquire media frequently exhibit a little quantum defect, ytterbium-doped tungstates allow for for especially compact values. Such as, a 1030-nm Yb:YAG laser would normally be pumped all around 940 nm, Whilst Yb:KGW or Yb:KYW may be most effectively pumped all-around 981 nm.
Li2WO4-WO3 flux was correctly applied minimizing The expansion temperature beneath 900 oC. In accordance with solitary crystal x-ray measurements, the crystal corresponds to the P2/n House team.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) compared to its counterpart Yb:KGW, is a extraordinary material that performs a vital function in laser engineering. Its Main functionality should be to generate ultrashort pulses of light, spanning only a few hundred femtoseconds.
Simultaneously, a shorter laser wavelength is often attained; it is possible to operate by using a quantum defect properly underneath one%. To be a consequence, the warmth technology can be so little that this partly compensates the reduced thermal conductivity.