The 2-Minute Rule for KGW Crystal
The 2-Minute Rule for KGW Crystal
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Prior function confirmed that the twin-crystal configuration may be used to compensate to the thermal lensing result[
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For many applications, tungstates supply a combination of different useful Homes. Specifically for passive mode locking, ytterbium-doped double tungstates in many cases are outstanding to other media concerning the combination of large get bandwidth, large cross-sections, and comparatively excellent thermal Qualities �?Regardless that in Each and every particular self-discipline much better products may be located.
The primary two peaks could be associated with luminescence of pure material59, although the remaining peaks may very well be attributed for the luminescence of unknown dopants, Even though the provider specified the sample as undoped. The luminescence of YAG crystal provides sturdy UV luminescence which has a utmost depth at 300 nm, which happens to be attributed to blended self-trapped exciton and antisite defect-connected emissions60. Eventually, no luminescence while in the UV, obvious and in close proximity to-IR was noticed in KGW and LT crystals, a minimum of throughout the detection choice of fiber spectrometer (200�?00 nm).
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For tungstates, the ytterbium doping focus can be very high without the need of considerable quenching because the changed ions have an incredibly similar ion radius, as well as the inter-ion distance is fairly large.
Another was positioned with its Np -axis parallel Along with the s-polarized course. A comparison was created amongst a configuration While using the crystals put in a similar orientation (
Last but not least, we investigated the extended-time period performances of SC era in crystal samples underneath KGW Crystal optimal pumping ailments at larger laser repetition fees. In doing this, the crystal samples weren't translated and held within a stationary place with regard for the pump beam in the complete measurement. The illustrations illustrating sturdy very long-phrase performances of SC technology in KGW and YAG crystals at large laser repetition prices can be discovered somewhere else. More exclusively, stable effectiveness of KGW crystal at 2 MHz pulse repetition price underneath pretty equivalent pump beam concentrating geometry was described recently30, Whilst YAG crystal demonstrated steady general performance for several hours at 200 kHz pulse repetition charge Despite quite restricted concentrating with the pump beam (NA=0.085)32. The extended-expression performance exams in LSO, LYSO and YSO uncovered gradual narrowing in the SC spectra about the very long-wavelength aspect that happened following a particular exposure time and could be attributed on the optical degradation of those elements. For instance, in LSO, the onset of spectral narrowing was observed immediately after (sim twenty) minutes at a laser repetition rate of ten kHz, while in a laser repetition level of 20 kHz, stable SC technology effectiveness was noticed just for roughly 2 min.
]. This method was according to The reality that the spectral emission cross-section curves vary from one another when laser polarization is paralleled to the different optical axis of Yb-doped double tungstates[
The two-pump laser could give around one hundred twenty W power. Approximately sixty% of the most pump electric power was used inside our experiment contemplating the reduced general performance in the dichroic mirrors. Below this twin-crystal configuration, our cavity supports a one hundred W pump electrical power input, as talked over in Portion 2.two. Substantial-high quality dichroic mirrors might be utilized Sooner or later, and laser pulses will likely be stretched to an extended pulse duration.
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The scattered photons have a special wavelength and Power than the incident photons, which results in a Raman spectrum.
The origin with the factor's name arises from the English word 'potash,' indicating pot ashes, plus the Arabic phrase qali