A Simple Key For KGW Crystal Unveiled
A Simple Key For KGW Crystal Unveiled
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Though ytterbium-doped laser acquire media typically exhibit a small quantum defect, ytterbium-doped tungstates let for particularly compact values. One example is, a 1030-nm Yb:YAG laser would Typically be pumped about 940 nm, Whilst Yb:KGW or Yb:KYW could possibly be most effectively pumped around 981 nm.
The achieve bandwidth e.g. of Yb:KGW and Yb:KYW is rather massive in comparison with that of Yb:YAG. This enables for extensive wavelength tunability and for Substantially shorter pulse durations from method-locked lasers. Values nicely below a hundred fs have been achieved with passive mode locking.
Concurrently, a shorter laser wavelength can be acquired; it is feasible to operate having a quantum defect properly down below 1%. For a consequence, the warmth technology might be so smaller that this partly compensates the reduced thermal conductivity.
The datasets employed and/or analysed during the current analyze available within the corresponding writer on acceptable request.
For tungstates, the ytterbium doping focus can be quite substantial with no major quenching since the replaced ions have a very identical ion radius, as well as inter-ion length is fairly substantial.
Later on, We'll undertake a laser seed with a broader spectral bandwidth and apply an acousto-optical programmable dispersive filter to modulate the seed’s spectrum to produce complete use of your attain bandwidth of our regenerative amplifier.
KGW (potassium gadolinium tungstate) is often a crystal that is usually made use of as a Raman crystal in Raman spectroscopy. It is a colorless, clear crystal that has a high Raman scattering efficiency and a robust Raman spectrum, which makes it appropriate for A variety of Raman programs.
Whilst BGO and LT generated the narrowest SC spectra (marginally a lot less than 1.five optical octaves), they might be viewed as extremely beautiful nonlinear elements for broadband SC generation with pumping at extended laser wavelengths. Owing to its big nonlinearity, BGO exhibited the lowest SC era threshold (78 nJ) among the investigated resources, which can be 25 % decrease than in KGW and will be considered as great nonlinear product for really minimal-threshold SC generation. The observed secure and sturdy hurt-totally free overall performance of BGO and GGG at 200 kHz pulse repetition price implies that these nonlinear components have a potential for SC generation at even greater, MHz, repetition rates. What's more, these supplies deliver SC radiation with a superb set of parameters which can be essential for programs in substantial pace spectroscopy and imaging that utilize click here bulk-produced SC, see e.g.17,18,19,20.
Determine 4 Beam radius variation on the two crystals although shifting the focal length on the thermal lensing effect.
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The Yb:KGW laser system incorporates a quasi-3-amount actions. The net obtain with the Yb:KGW crystal wasn't high: quite a few tens of roundtrips were necessary to amplify the nanojoule seed to your millijoule amount. As a result, the obtain-narrowing result was unavoidable in Yb:KGW regenerative amplifiers.
Determine four Beam radius variation on the two crystals while transforming the focal length with the thermal lensing impact.
Both equally energies are marked by the dashed lines and their values are labeled inside the plots. The similar capabilities were being also observed in KGW and YAG crystals, whose spectral broadening dynamics are proven for the comparison in Fig. four.