KYW Crystal - An Overview
KYW Crystal - An Overview
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We existing a twin-crystal Yb:KGW laserthat iscapable to operate as a Q-switched oscillator with output electrical power as many as 24 W and pulse length of twenty ns,or like a regenerative amplifier with output energy around 21 W and pulse period beneath 200 fs immediately after compression of chirped pulses. Each lasers have great beam high-quality with beam parameter M2
The absorption and emission spectra of Yb:KYW Crystals Display screen sturdy peaks at 980 nm and 1030 nm, respectively, guaranteeing productive Power conversion and high general performance in laser techniques.
Optical structure of the laser with immediate pumping With all the radiation of semiconductor injection lasers. LD is surely an IPG Photonics laser diode with fiber output of the radiation, WP is often a fifty percent-wave plate, CL is actually a collimating lens, FL is often a concentrating lens, AE is definitely an active factor constructed from an Yb:KYW crystal, DM is usually a spherical dichroic mirror, M1-M6 will be the cavity mirrors, OC could be the output mirror, and SAM is actually a semiconductor saturable-absorber mirror.
The monoclinic crystal buildings brings about a purely natural birefringence, helping to prevent thermally induced polarization rotation and depolarization loss.
FIG. 1. Optical layout of the laser with immediate pumping with the radiation of semiconductor injection lasers. LD is undoubtedly an IPG Photonics laser diode with fiber output
Spatial structure from the beam along with the corresponding intensity profiles I for the output from the laser.
... at half-top ended up produced inside a learn oscillator with selfsynchronization with the axial modes, described inside our previously write-up. 21 The new edition on the laser, contrary to that described within our earlier posting, utilised an Yb:KYW crystal with the N pcut (optical axis N p of your index ellipsoid was parallel into the propagation way with the laser radiation), Along with the polarization of your produced radiation directed along the N m axis.
Superior-ability repetitively pulsed ytterbium lasers with supershort pulse width and direct diode pumping for technological and biomedical purposes
The thermal conductivity of widespread double tungstates is in the purchase to 3–four W/(K m) �?which is not negative as opposed with other laser crystals (Despite the fact that many times lower than for YAG), and relatively massive in comparison While read more using the thermal conductivity of typical glasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) when compared with its counterpart Yb:KGW, can be a extraordinary material that performs a crucial function in laser technologies. Its Most important operate is to make ultrashort pulses of light, spanning only a few hundred femtoseconds.
At the same time, a shorter laser wavelength is often obtained; it is possible to function having a quantum defect properly below 1%. To be a consequence, the heat technology can be so smaller that this partly compensates the decreased thermal conductivity.