Fascination About KGW Crystal
Fascination About KGW Crystal
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Previous perform showed that the twin-crystal configuration may be used to compensate for your thermal lensing impact[
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For many apps, tungstates offer a combination of various practical Houses. Specifically for passive manner locking, ytterbium-doped double tungstates are often exceptional to other media with regards to The mixture of high obtain bandwidth, substantial cross-sections, and comparatively good thermal properties �?even though in each distinct self-discipline greater components could possibly be discovered.
In summary, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are economical nonlinear supplies for broadband SC era from the around-infrared and short-wave infrared spectral ranges, when pumped by one hundred eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO manufactured two octave-spanning SC spectra, which Assess to SC spectra produced in YAG. These materials show fairly related performances to YAG also with regard to threshold and optimal pump pulse energies for SC era. Having said that, for what fears the chance to operate at significant laser pulse repetition rate, YSO, LSO and LYSO display resilient Procedure only at ten kHz and rapidly degrade (inside of a couple of minutes) at twenty kHz. Aside from the rather minimal SC era threshold (169 nJ), GGG shown wonderful functionality traits during the quick-wave infrared With all the best pump pulse energy of 464 nJ, that is two times reduced than in YAG: the biggest purple-shifted spectral broadening and the highest spectral Strength density, outperforming KGW and YAG crystals in that element.
Its pump laser wants a brief pulse duration, a reduced time jitter, and sleek temporal and spatial distributions because of the intrinsic instantaneous process. Consequently, the OPCPA method is more sophisticated and high priced.
The comparison with Eyeglasses is appropriate Because the substantial attain bandwidth will allow e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
Quite a few solutions have already been adopted to unravel this problem. An acousto-optical programmable dispersive filter is often used to modulate the seed’s spectrum to suppress the get-narrowing impact[
Comparison of spectral Electricity densities of supercontinua created while in the disorders of exceptional pumping during the investigated components.
Whilst BGO and LT generated the narrowest SC spectra (marginally under one.five optical octaves), they might be viewed as pretty attractive nonlinear materials for broadband SC generation with pumping at more time laser wavelengths. Owing to its huge nonlinearity, BGO exhibited the bottom SC generation threshold (seventy eight nJ) Amongst the investigated resources, and that is twenty five % reduce than in KGW and could be considered as fantastic nonlinear substance for very small-threshold SC generation. The observed stable and durable problems-free general performance of BGO and GGG at two hundred kHz pulse repetition rate indicates that these nonlinear products have a possible for SC generation at even bigger, MHz, repetition premiums. What's more, these materials supply SC radiation with a fantastic list of parameters that happen to be important for applications in high pace spectroscopy and imaging that make use of bulk-produced SC, see e.g.17,18,19,20.
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The origin on the element's title originates from the English phrase 'potash,' that means pot ashes, plus the Arabic term qali