KGW Crystal - An Overview
KGW Crystal - An Overview
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The thermal conductivity of prevalent double tungstates is on the order to 3–four W/(K m) �?which isn't terrible compared with other laser crystals (Even though a number of situations under for YAG), and fairly big compared Along with the thermal conductivity of common Eyeglasses.
We applied a transmission grating (TG) like a dispersive part within our stretcher and compressor. A compact configuration was adopted, where by the stretcher as well as the compressor shared just one grating just like that in Ref.
In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are successful nonlinear products for broadband SC generation while in the in close proximity to-infrared and limited-wave infrared spectral ranges, when pumped by a hundred and eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO manufactured two octave-spanning SC spectra, which Review to SC spectra made in YAG. These products exhibit rather equivalent performances to YAG also with regard to threshold and exceptional pump pulse energies for SC generation. Even so, for what considerations the likelihood to operate at large laser pulse repetition level, YSO, LSO and LYSO show long lasting Procedure only at 10 kHz and promptly degrade (in a couple of minutes) at 20 kHz. Aside from the relatively reduced SC generation threshold (169 nJ), GGG demonstrated exceptional functionality characteristics from the limited-wave infrared Together with the optimal pump pulse Power of 464 nJ, which is two occasions decrease than in YAG: the largest crimson-shifted spectral broadening and the very best spectral Vitality density, outperforming KGW and YAG crystals in that component.
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For tungstates, the ytterbium doping focus can be quite substantial devoid of important quenching because the replaced ions have a really comparable ion radius, and also the inter-ion distance is relatively big.
One other was positioned with its Np -axis parallel Together with the s-polarized way. A comparison was created between a configuration Along with the crystals positioned in a similar orientation (
KGW (potassium gadolinium tungstate) is actually a crystal that is often utilised as a Raman crystal in Raman spectroscopy. This is a colorless, transparent crystal which has a significant Raman scattering efficiency and a solid Raman spectrum, which makes it well suited for A variety of Raman apps.
Ask RP Photonics for any advice about tungstate lasers, such as femtosecond lasers and large-electricity lasers.
The two-pump laser could present as much as a hundred and twenty W electrical power. Approximately 60% of the utmost pump ability was used inside our experiment thinking about the low efficiency from the dichroic mirrors. Less than this twin-crystal configuration, our cavity supports a 100 W pump electric power input, as talked over in Section two.2. Large-high quality dichroic mirrors will probably be used Sooner or later, and laser pulses is going to be stretched to a longer pulse duration.
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The Yb:KGW laser method has a quasi-three-degree conduct. The online achieve in the Yb:KGW crystal wasn't significant: numerous tens of roundtrips have been needed to amplify the nanojoule seed to a millijoule degree. Hence, the obtain-narrowing effect was inevitable in Yb:KGW regenerative amplifiers.
Determine 4 Beam radius variation on the two crystals although switching the focal duration in the thermal lensing impact.
]. The twin-crystal configuration lowers the thermal load on Just about every crystal even though retaining a higher gain, and facilitates the compensation of each one’s thermal lensing outcome. Therefore, the laser cavity can operate with a sizable stability range over the thermal lensing outcome variation.