The Single Best Strategy To Use For KGW Crystal
The Single Best Strategy To Use For KGW Crystal
Blog Article
Prior operate confirmed that the twin-crystal configuration can be utilized to compensate for the thermal lensing outcome[
Whilst ytterbium-doped laser attain media generally exhibit a little quantum defect, ytterbium-doped tungstates allow for for specially tiny values. For instance, a 1030-nm Yb:YAG laser would normally be pumped close to 940 nm, While Yb:KGW or Yb:KYW can be most efficiently pumped about 981 nm.
The pictures or other 3rd party materials in the following paragraphs are A part of the report’s Creative Commons licence, Except indicated in any other case in the credit score line to the material. If content will not be A part of the report’s Artistic Commons licence plus your meant use just isn't permitted by statutory regulation or exceeds the permitted use, you must obtain authorization directly from the copyright holder. To see a copy of the licence, visit .
In summary, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are economical nonlinear elements for broadband SC technology in the around-infrared and short-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 developed two octave-spanning SC spectra, which Examine to SC spectra created in YAG. These elements exhibit pretty equivalent performances to YAG also with regard to threshold and optimum pump pulse energies for SC era. Nevertheless, for what worries the chance to operate at higher laser pulse repetition charge, YSO, LSO and LYSO present sturdy operation only at 10 kHz and quickly degrade (inside of a few minutes) at 20 kHz. Moreover the somewhat very low SC technology threshold (169 nJ), GGG demonstrated excellent functionality features from the shorter-wave infrared Along with the optimum pump pulse Electricity of 464 nJ, and that is two periods lessen than in YAG: the biggest crimson-shifted spectral broadening and the highest spectral Power density, outperforming KGW and YAG crystals in that aspect.
-switched manner. The bandwidth in the orthogonal orientation was Evidently Substantially broader. The calculated Fourier completely transform limited pulse duration was as limited as sub-a hundred and sixty fs. Beneath the configuration exactly where The 2 crystals ended up positioned in exactly the same orientation, with the seed input, the amplified pulse bandwidth was only 3 nm with one hundred eighty μJ Electrical power when it broke the dichroic mirrors.
The calculated Reduce-off wavelengths in the limited-wavelength aspect are in keeping with the final trend of blue-shifted spectral broadening within the bandgap of nonlinear product. The many nonlinear elements manufactured sensible red-shifted spectral broadenings beneath circumstances of optimum pump pulse energies, with the largest pink-change exceeding 2000 nm calculated in GGG crystal. Our effects revealed that GGG and BGO (which also experienced the lowest supercontinuum generation threshold) give long lasting, optical harm-free general performance at a laser repetition amount of 200 kHz, suggesting that these elements are excellent options to YAG and KGW for low threshold, higher average power supercontinuum technology within the close to- and shorter-wave infrared spectral ranges. We also demonstrated that scintillating properties of bulk resources could be conveniently examined inside the filamentation routine, by way of multiphoton excitation utilizing in the vicinity of-infrared femtosecond laser pulses.
Skip to major articles Thanks for browsing nature.com. You might be employing a browser Variation with constrained help for CSS. To acquire the top practical experience, we advocate you employ a more current browser (or change off compatibility manner in Internet Explorer).
At last, we investigated the prolonged-expression performances of SC technology in crystal samples less than exceptional pumping disorders at greater laser repetition rates. In doing so, the crystal samples were not translated and kept in a stationary situation with regard to your pump beam during the whole measurement. The examples illustrating sturdy lengthy-expression performances of SC era in KGW and YAG crystals at significant laser repetition costs may be found elsewhere. A lot more precisely, secure effectiveness of KGW crystal at 2 MHz pulse repetition level less than extremely identical pump beam concentrating geometry was reported recently30, Whilst YAG crystal shown steady efficiency for several hrs at two hundred kHz pulse repetition charge Despite incredibly tight focusing of your pump beam (NA=0.085)32. The very long-term functionality checks in LSO, LYSO and YSO revealed gradual narrowing of the SC spectra around the extended-wavelength facet that happened after a certain publicity time and could be attributed towards the optical degradation of these products. As an illustration, in LSO, the onset of spectral narrowing was noticed right after (sim 20) minutes in a laser repetition amount of 10 kHz, whilst at a laser repetition charge of 20 kHz, steady SC generation performance was observed just for about 2 min.
]. This technique was based upon The point that the spectral emission cross-section curves vary from one another when laser polarization is paralleled to different optical axis of Yb-doped double tungstates[
Meanwhile, to guarantee ongoing assist, we have been displaying the website with out kinds and JavaScript.
EKSMA Optics employs cookies to provde the very best purchasing experience. In case you keep on to utilize our providers, We are going to think that you just comply with the usage of these kinds of cookies.
The Yb:KGW laser program includes a quasi-a few-level habits. The net gain of the Yb:KGW crystal was not significant: various tens of roundtrips were needed to amplify the nanojoule seed to some millijoule level. As a result, the get-narrowing outcome was inevitable in Yb:KGW regenerative amplifiers.
Springer Mother nature or its licensor (e.g. a Culture or other companion) retains special legal rights to this information underneath a publishing settlement Along with the creator(s) or other rightsholder(s); author self-archiving from the accepted manuscript Model of this short article is entirely ruled from the terms of these types of publishing settlement and click here applicable regulation.
KGW crystals are employed as Raman scattering elements because they have strong Raman scattering at a number of various wavelengths. Each time a laser beam is directed on to the crystal, the photons while in the laser beam communicate with the crystal lattice, causing many of the photons to scatter in a different direction.