Fascination About KGW Crystal
Fascination About KGW Crystal
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The attain bandwidth e.g. of Yb:KGW and Yb:KYW is quite substantial compared with that of Yb:YAG. This allows for wide wavelength tunability and for A lot shorter pulse durations from manner-locked lasers. Values very well beneath one hundred fs have already been accomplished with passive manner locking.
Together with its use being a Raman crystal, KGW can also be Employed in other optical purposes, including in laser programs and to be a scintillator in health-related imaging.
In distinction, the seed laser could be amplified to around 1 mJ under the orthogonal orientation configuration.
For tungstates, the ytterbium doping concentration can be quite large without the need of substantial quenching since the replaced ions have a really equivalent ion radius, as well as the inter-ion length is comparatively massive.
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Finally, we investigated the extended-expression performances of SC generation in crystal samples underneath ideal pumping conditions at bigger laser repetition fees. In doing this, the crystal samples weren't translated and retained in the stationary posture with regard to the pump beam in the overall measurement. The illustrations illustrating strong extended-expression performances of SC era in KGW and YAG crystals at higher laser repetition costs might be found elsewhere. Much more specially, secure effectiveness of KGW crystal at two MHz pulse repetition amount less than quite comparable pump beam concentrating geometry was reported recently30, While YAG crystal demonstrated steady general performance for quite a few several hours at 200 kHz pulse repetition charge In spite of extremely limited concentrating with the pump beam (NA=0.085)32. The prolonged-expression efficiency checks in more info LSO, LYSO and YSO discovered gradual narrowing of the SC spectra about the very long-wavelength side that happened soon after a specific exposure time and will be attributed on the optical degradation of such supplies. For example, in LSO, the onset of spectral narrowing was noticed just after (sim 20) minutes at a laser repetition level of ten kHz, although in a laser repetition level of twenty kHz, secure SC era efficiency was observed just for roughly two min.
As a result, with an extra improvement in our regenerative amplifier, 2 mJ compressed pulses is usually predicted, with out harming any element inside of our compressor.
The two-pump laser could supply nearly a hundred and twenty W energy. Close to 60% of the most pump energy was applied within our experiment contemplating the low general performance in the dichroic mirrors. Underneath this dual-crystal configuration, our cavity supports a 100 W pump power input, as reviewed in Part two.two. Superior-top quality dichroic mirrors will be applied Down the road, and laser pulses will be stretched to an extended pulse length.
Despite the fact that BGO, GGG, YSO, LSO and LYSO from time to time serve as laser hosts37, They are really mostly recognized as efficient scintillators, whose scintillation Attributes are analyzed rather well38. On the other hand, the nonlinear optical Qualities of such crystals and so their probable to serve as nonlinear resources for SC technology in particular, and another experiments relating to nonlinear propagation of extreme femtosecond laser pulses, keep on being very inadequately analyzed. To date, GGG, LT23,twenty five and YSO24 have been only sketchily examined for SC era with Ti:sapphire laser pumping, nevertheless, to the very best of our information, none of the investigated elements were being examined with Yb-laser pumping, specifically for what considerations their general performance at pretty superior (tens to numerous kHz) pulse repetition premiums.
Tungstates are inclined to acquire superior Raman coefficients (�?Raman scattering). Hence, they're able to produce substantial Raman acquire at moderate optical intensities. It can be done to make use of the laser crystal alone as being a Raman converter.
Determine four Beam radius variation on the two crystals when transforming the focal duration from the thermal lensing impact.
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