The smart Trick of KGW Crystal That No One is Discussing
The smart Trick of KGW Crystal That No One is Discussing
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The thermal conductivity of common double tungstates is on the buy to three–four W/(K m) �?which is not poor compared with other laser crystals (Though a number of periods below for YAG), and reasonably significant as opposed Along with the thermal conductivity of typical Eyeglasses.
The attain bandwidth e.g. of Yb:KGW and Yb:KYW is extremely substantial in contrast with that of Yb:YAG. This permits for broad wavelength tunability and for A great deal shorter pulse durations from mode-locked lasers. Values properly down below one hundred fs have been achieved with passive method locking.
Figure seven displays the calculated dispersion compensation result. The compressed pulse period is all around 185 fs when the length of enter pulses is 150 fs. The discrepancy between them will probably be substantially diminished with a longer pulse input for the reason that uncompensated substantial-buy dispersion issues considerably less for lengthier pulses. This configuration was accustomed to demonstrate the compressibility of our amplified pulses at the preliminary phase of our total procedure. In the future we'd undertake a grating-pair compressor for fine compensation for top-get dispersion.
The monoclinic crystal structures results in a all-natural birefringence, assisting to stay clear of thermally induced polarization rotation and depolarization reduction.
Potassium was uncovered and 1st isolated by Sir Humphrey Davy in 1807. Potassium is the seventh most abundant element in the world. It truly is The most reactive and electropositive of all metals and speedily oxidizes. As with other alkali metals, potassium decomposes in h2o Together with get more info the evolution of hydrogen on account of its reacts violently with drinking water, it only occurs in mother nature in ionic salts.
The opposite was positioned with its Np -axis parallel with the s-polarized way. A comparison was created concerning a configuration While using the crystals placed in a similar orientation (
The merged get is advanced and should be measured beneath different pumping problems as a result of quasi-three-stage process habits with the Yb-doped attain medium. The blueshift, with a person peak from 1037 nm beneath the exact crystal placement orientation to 1035 nm under the orthogonal crystal placement orientation, could end result from your reabsorption losses at a lengthy wavelength from the crystal where the laser polarization is parallel to its Nm -axis, making the attain at 1035 nm increased than that at 1037 nm under orthogonal orientation.
Check with RP Photonics for almost any advice regarding tungstate lasers, which includes femtosecond lasers and substantial-power lasers.
The two-pump laser could present nearly 120 W power. Approximately 60% of the most pump ability was used within our experiment thinking of the lower general performance of your dichroic mirrors. Beneath this dual-crystal configuration, our cavity supports a one hundred W pump electrical power input, as mentioned in Area 2.two. Substantial-quality dichroic mirrors are going to be applied Later on, and laser pulses will probably be stretched to an extended pulse length.
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The Yb:KGW laser program contains a quasi-three-degree behavior. The online attain from the Yb:KGW crystal wasn't higher: a number of tens of roundtrips ended up needed to amplify the nanojoule seed to your millijoule degree. Therefore, the gain-narrowing influence was inevitable in Yb:KGW regenerative amplifiers.
Determine eight Intra-cavity pulse amplification approach monitored by an oscilloscope. The pulse underwent an unsaturated amplification as a result of mirror destruction limitation.
Both energies are marked from the dashed strains as well as their values are labeled while in the plots. The similar attributes ended up also observed in KGW and YAG crystals, whose spectral broadening dynamics are shown for the comparison in Fig. 4.