New Step by Step Map For KYW Crystal
New Step by Step Map For KYW Crystal
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The comparison with glasses is acceptable since the massive gain bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.
We present a dual-crystal Yb:KGW laserthat iscapable to function for a Q-switched oscillator with output energy as many as 24 W and pulse length of 20 ns,or to be a regenerative amplifier with output power approximately 21 W and pulse duration underneath two hundred fs immediately after compression of chirped pulses. Both equally lasers have great beam excellent with beam parameter M2
The absorption and emission spectra of Yb:KYW Crystals Show potent peaks at 980 nm and 1030 nm, respectively, making certain effective Power conversion and substantial efficiency in laser programs.
Optical structure of the laser with immediate pumping While using the radiation of semiconductor injection lasers. LD is an IPG Photonics laser diode with fiber output of the radiation, WP is a 50 %-wave plate, CL is actually a collimating lens, FL can be a focusing lens, AE is definitely an Lively ingredient constructed from an Yb:KYW crystal, DM is often a spherical dichroic mirror, M1-M6 tend to be the cavity mirrors, OC would be the output mirror, and SAM is actually a semiconductor saturable-absorber mirror.
Just after air drying and subsequent cleaning having a cotton fabric soaked in alcohol, the film area showed no signs of peeling or scratches.
PDF Yb:KGW and Yb:KYW crystals have wide emission bandwidths and they are made use of as lasing materials to generate ultrashort (~ 100-two hundred fs) high power pulses. Direct pump of Yb:KGW/KYW crystals with laser diodes running at 981 nm supports compact laser devices.
5 mm other than the middle of your beam caustic. In order to Check out the method matching simulation, we performed the experiment with Ng-Minimize crystal oscillator, which was produced Earlier As well as in a similar problem with simulation [eleven]. As shown in Determine three(b) with red dots and line, the CW output energy is extremely dependent on the position of laser crystal and also the experimental result coincides properly with simulation end result. To be a Observe, multimode Procedure occurred in experiment if the size with the pump beam is larger than TEM00 cavity manner and it brings about larger CW output ability within the displacement location beneath three.5 mm.
For tungstates, the ytterbium doping concentration can be extremely significant without important quenching as the replaced ions have an exceedingly identical ion radius, and also the inter-ion length is pretty huge.
... Not merely the position of crystal while in the cavity and also the amplification axis of crystal affects the laser operation significantly, since the absorption and emission cross sections on the crystal are quite various according to the orientation on the crystal.
The thermal conductivity of prevalent double tungstates is of the get to 3–four W/(K m) �?which is not negative when compared with other laser crystals (While many situations less than for YAG), and quite big in comparison Using the thermal conductivity of common glasses.
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Yb:KYW crystal (Yb-doped potassium yttrium tungstate) in comparison to its counterpart Yb:KGW, is really a outstanding material that performs a significant purpose in laser know-how. Its Principal operate is always to generate ultrashort pulses of sunshine, spanning just a couple hundred femtoseconds.
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