Not known Details About KGW Crystal
Not known Details About KGW Crystal
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Down the road, an investigation to the spectral acquire curve of Yb:KGW in the principle amplifier are going to be carried out below cryogenic temperature evolution from 77 K to three hundred K. The Operating temperature will likely be managed to appreciate broader acquire bandwidth and less shift on the central wavelength of the most crucial amplifier.
At the same time, a shorter laser wavelength could be acquired; it can be done to function having a quantum defect very well underneath 1%. For a consequence, the warmth technology could be so compact that this partly compensates the decrease thermal conductivity.
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]. Etalon insertion would result in further loss, on the other hand, time-to-time optimization would introduce the risk of part harm and instability to your program. A nonlinear regenerative amplifier could instantly deliver pulses that has a duration as little as ninety seven fs plus a spectral bandwidth of 19 nm[
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Lastly, we investigated the extensive-phrase performances of SC technology in crystal samples below ideal pumping circumstances at better laser repetition charges. In doing this, the crystal samples were not translated and retained inside a stationary situation with respect to the pump beam in the course of the overall measurement. The examples illustrating strong extended-phrase performances of SC technology in KGW and YAG crystals at large laser repetition fees may very well be discovered in other places. Much more specially, secure effectiveness of KGW crystal at two MHz pulse repetition price beneath pretty comparable pump beam focusing geometry was noted recently30, While YAG crystal demonstrated steady effectiveness for several hours at 200 kHz pulse repetition charge Despite having very limited concentrating of your pump beam (NA=0.085)32. The lengthy-time period effectiveness checks in LSO, LYSO and YSO exposed gradual narrowing on the SC spectra to the extensive-wavelength facet that happened after a certain exposure time and could be attributed for the optical degradation of these components. By way of example, in LSO, the onset of spectral narrowing was observed soon after (sim 20) minutes at a laser repetition rate of ten kHz, though in a read more laser repetition fee of 20 kHz, stable SC technology general performance was noticed just for about 2 min.
]. This technique was according to The reality that the spectral emission cross-portion curves differ from each other when laser polarization is paralleled to the several optical axis of Yb-doped double tungstates[
Figure four Beam radius variation on The 2 crystals whilst transforming the focal duration from the thermal lensing influence.
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