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For a few purposes, tungstates offer you a combination of various beneficial Houses. Especially for passive mode locking, ytterbium-doped double tungstates are often superior to other media in terms of The mix of higher gain bandwidth, large cross-sections, and comparatively excellent thermal Attributes �?Despite the fact that in Each and every certain discipline better components can be observed.

In conclusion, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are efficient nonlinear resources for broadband SC generation from the in close proximity to-infrared and shorter-wave infrared spectral ranges, when pumped by one hundred eighty fs basic harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO manufactured two octave-spanning SC spectra, which Look at to SC spectra generated in YAG. These elements show fairly equivalent performances to YAG also concerning threshold and ideal pump pulse energies for SC generation. However, for what issues the likelihood to function at superior laser pulse repetition rate, YSO, LSO and LYSO present sturdy Procedure only at ten kHz and immediately degrade (in a couple of minutes) at twenty kHz. Moreover the reasonably minimal SC era threshold (169 nJ), GGG shown superb efficiency characteristics during the quick-wave infrared with the ideal pump pulse Electricity of 464 nJ, which happens to be two instances reduced than in YAG: the most important purple-shifted spectral broadening and the highest spectral Power density, outperforming KGW and YAG crystals in that part.

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The comparison with glasses is appropriate For the reason that large acquire bandwidth allows e.g. tungstate femtosecond lasers and tunable lasers to compete with glass lasers.

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Ultimately, we investigated the lengthy-term performances of SC technology in crystal samples less than exceptional pumping conditions at greater laser repetition fees. In doing this, the crystal samples were not translated and held in the stationary posture with regard for the pump beam in the course of the whole measurement. The illustrations illustrating sturdy lengthy-time period performances of SC generation in KGW and YAG crystals at superior laser repetition costs could possibly be identified elsewhere. Far more exclusively, steady effectiveness of KGW crystal at two MHz pulse repetition amount beneath pretty related pump beam concentrating geometry was reported recently30, Whilst YAG crystal demonstrated secure efficiency for quite a few hours at 200 kHz pulse repetition amount Despite having very limited focusing in the pump beam (NA=0.085)32. The very long-term efficiency exams in LSO, LYSO and YSO revealed gradual narrowing of the SC spectra over the prolonged-wavelength aspect that happened just after a particular exposure time and could be attributed to the optical degradation of such materials. As an illustration, in LSO, the onset of spectral narrowing was observed following (sim twenty) minutes at a laser repetition amount of 10 kHz, whilst in a laser repetition fee of 20 kHz, stable SC generation general performance was observed just for about two min.

Request RP Photonics for just about any tips regarding tungstate lasers, like femtosecond lasers and superior-ability lasers.

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The Yb:KGW laser procedure features a quasi-three-amount actions. The net get on the Yb:KGW crystal wasn't high: various tens of roundtrips were being required to amplify the nanojoule seed into a millijoule level. Hence, the attain-narrowing outcome here was inevitable in Yb:KGW regenerative amplifiers.

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KGW crystals are utilised as Raman scattering elements given that they have solid Raman scattering at a variety of different wavelengths. Any time a laser beam is directed on to the crystal, the photons from the laser beam connect with the crystal lattice, causing a few of the photons to scatter in a different direction.