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 huge when compared with that of Yb:YAG. This allows for huge wavelength tunability and for much shorter pulse durations from mode-locked lasers. Values nicely down below a hundred fs are actually achieved with passive mode locking.
The Yb-doped potassium yttrium tungstate (Yb:KYW) crystal, when compared to its counterpart Yb:KGW, is usually a impressive product that performs a very important part in laser engineering. Its Main operate is usually to crank out ultrashort pulses of sunshine, spanning just a few hundred femtoseconds.
We present a dual-crystal Yb:KGW laserthat iscapable to function to be a Q-switched oscillator with output electrical power as many as 24 W and pulse duration of twenty ns,or as a regenerative amplifier with output power up to 21 W and pulse period below two hundred fs just after compression of chirped pulses. Each lasers have superb beam high quality with beam parameter M2
The absorption and emission spectra of Yb:KYW Crystals display sturdy peaks at 980 nm and 1030 nm, respectively, making sure effective Electrical power conversion and large overall performance in laser methods.
Optical structure of the laser with direct pumping Together with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output with the radiation, WP is often a 50 percent-wave plate, CL is often a collimating lens, FL can be a concentrating lens, AE can be an Energetic component made out of an Yb:KYW crystal, DM is actually a spherical dichroic mirror, M1-M6 will be the cavity mirrors, OC is the output mirror, and SAM can be a semiconductor saturable-absorber mirror.
The monoclinic crystal constructions ends in a organic birefringence, helping to keep away from thermally induced polarization rotation and depolarization reduction.
FIG. 1. Optical layout of the laser with immediate pumping Along with the radiation of semiconductor injection lasers. LD is really an IPG Photonics laser diode with fiber output
Tungstates have a tendency to possess higher Raman coefficients (�?Raman scattering). Hence, they're able to deliver considerable Raman get at moderate optical intensities. It is feasible to utilize the laser crystal alone as a Raman converter.
... at 50 %-top were created in a master oscillator with selfsynchronization from the axial modes, described inside our before posting. 21 The new edition with the laser, contrary to that described within our before report, applied an Yb:KYW crystal having an N pcut (optical axis N p with the index ellipsoid was parallel into the propagation course with the laser radiation), Together with the polarization of your created radiation directed along the N m axis.
By substituting yttrium with ytterbium within the crystal lattice of Yb:KYW as a result of very similar measurements of such chemical components nearly one hundred% of Yb-doping could possibly be realized.
Although ytterbium-doped laser get media generally exhibit a small quantum defect, ytterbium-doped tungstates enable for specially compact values. For instance, a 1030-nm Yb:YAG laser would Typically be pumped all around 940 nm, While Yb:KGW or Yb:KYW could be most effectively pumped about 981 nm.
Li2WO4-WO3 flux was properly applied cutting down the growth temperature KYW Crystal under 900 oC. According to solitary crystal x-ray measurements, the crystal corresponds into the P2/n Room team.
Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison with its counterpart Yb:KGW, can be a amazing product that performs a very important job in laser technologies. Its Major perform is always to produce ultrashort pulses of light, spanning just some hundred femtoseconds.
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