KGW Crystal Things To Know Before You Buy
KGW Crystal Things To Know Before You Buy
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In conclusion, we shown that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are economical nonlinear resources for broadband SC technology during the around-infrared and shorter-wave infrared spectral ranges, when pumped by one hundred eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO made two octave-spanning SC spectra, which Look at to SC spectra generated in YAG. These resources show rather similar performances to YAG also concerning threshold and best pump pulse energies for SC generation. Nonetheless, for what fears the likelihood to function at significant laser pulse repetition amount, YSO, LSO and LYSO show durable operation only at ten kHz and rapidly degrade (in a couple of minutes) at twenty kHz. In addition to the reasonably very low SC technology threshold (169 nJ), GGG demonstrated outstanding functionality attributes during the small-wave infrared With all the ideal pump pulse energy of 464 nJ, which can be two periods lessen than in YAG: the biggest red-shifted spectral broadening and the very best spectral Electrical power density, outperforming KGW and YAG crystals in that component.
], but it will incorporate way more Value to this component. The intra-cavity spectral achieve curve could be modulated by inserting an etalon that minimizes the actual get within the wavelength with the utmost get factor[
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The opposite was positioned with its Np -axis parallel With all the s-polarized way. A comparison was manufactured among a configuration with the crystals placed in the exact same orientation (
Comparison of spectral Electricity densities of supercontinua developed inside the conditions of optimum pumping inside the investigated resources.
Even though BGO and LT made the narrowest SC spectra (a little under one.5 optical octaves), they may be viewed as quite attractive nonlinear supplies for broadband SC generation with pumping at extended laser wavelengths. Owing to its big nonlinearity, BGO exhibited the bottom SC generation threshold (78 nJ) Amongst the investigated supplies, which can be 25 % decrease than in KGW and will be considered as great nonlinear materials for pretty low-threshold SC era. The noticed stable and durable hurt-cost-free general performance of BGO and GGG at 200 kHz pulse repetition amount indicates that these nonlinear materials have a potential for SC generation at even larger, MHz, repetition charges. Furthermore, these supplies present SC radiation with an excellent list of parameters which might be essential for programs in substantial speed spectroscopy and imaging that make use of bulk-produced SC, see e.g.seventeen,eighteen,19,20.
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Though BGO, GGG, YSO, LSO and LYSO at times serve as laser hosts37, These are mostly identified as economical scintillators, whose scintillation Homes are studied pretty well38. Having said that, the nonlinear optical Attributes of these crystals and so their potential to function nonlinear components for SC technology particularly, and another experiments relating to nonlinear propagation of intensive femtosecond laser pulses, remain incredibly improperly analyzed. To date, GGG, LT23,twenty five and YSO24 ended up only sketchily analyzed for SC generation with Ti:sapphire laser pumping, on the other hand, to the very best of our expertise, Not one of the investigated materials have been examined with Yb-laser pumping, especially for what problems their overall performance at very higher (tens to many kHz) pulse repetition fees.
-switched output spectrum of your regenerative amplifier supports a sub-160 fs pulse amplification. As a result, pulses with energies of around 2 mJ and length under two hundred fs may be acquired utilizing increased-quality dichroic mirrors and a broader-spectrum laser seed. This regenerative amplifier will work as a superb pre-amplifier for even more laser amplification.
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]. The dual-crystal configuration lowers the thermal load on Each individual crystal while sustaining a superior achieve, and facilitates the payment of every one’s thermal lensing effect. Consequently, the laser cavity can do the job with a considerable stability assortment in excess of the thermal lensing effect variation.