Little Known Facts About KGW Crystal.
Little Known Facts About KGW Crystal.
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Later on, an investigation to the spectral obtain curve of Yb:KGW in the key amplifier will likely be carried out under cryogenic temperature evolution from seventy seven K to 300 K. The Performing temperature will likely be controlled to understand broader attain bandwidth and fewer change with the central wavelength of the main amplifier.
Determine 7 displays the calculated dispersion compensation outcome. The compressed pulse period is all over 185 fs in the event the duration of input pulses is a hundred and fifty fs. The discrepancy concerning them will probably be considerably decreased with an extended pulse enter for the reason that uncompensated superior-purchase dispersion matters a lot less for longer pulses. This configuration was accustomed to clearly show the compressibility of our amplified pulses for the preliminary section of our full procedure. Later on we'd adopt a grating-pair compressor for wonderful payment for high-buy dispersion.
Its pump laser wants a short pulse duration, a reduced time jitter, and easy temporal and spatial distributions as a result of intrinsic instantaneous method. Thus, the OPCPA method is a lot more challenging and expensive.
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At last, we investigated the prolonged-time period performances of SC era in crystal samples under optimum pumping disorders at greater laser repetition fees. In doing so, the crystal samples weren't translated and held in the stationary situation with regard towards the pump beam in the overall measurement. The examples illustrating sturdy extended-time period performances of SC technology in KGW and YAG crystals at high laser repetition prices can be found somewhere else. Much more particularly, secure overall performance of KGW crystal at two MHz pulse repetition rate underneath very related pump beam focusing geometry was described recently30, whereas YAG crystal demonstrated stable performance for various hours at 200 kHz pulse repetition fee Despite having really limited focusing on the pump beam (NA=0.085)32. The prolonged-phrase performance tests in LSO, LYSO and YSO revealed gradual narrowing of your SC spectra on the very long-wavelength side that occurred just after a specific publicity time and could be attributed on the optical degradation of such materials. By way of example, in LSO, the onset of spectral narrowing was noticed following (sim twenty) minutes at a laser repetition fee of 10 kHz, while in a laser repetition fee of twenty kHz, secure SC era effectiveness was noticed just for approximately two min.
The actual spectra were reconstructed by correcting the calculated spectra with an account to the filter transmission functions and for the sensitivity functions on the spectrometers at the info submit-processing phase. The spectral dynamics in each sample was measured by high-quality tuning the pump pulse Electricity with a computer-controlled attenuator which was built-in within the laser system. Thermal Vitality meter EM (Ophir 3A-PF-12) was used to measure the SC Vitality which was thereafter used to determine the spectral Vitality density on the SC radiation. Many of the measurements ended up done with no translation on the sample with regard into the pump beam.
Determine 4 Beam radius variation on The 2 crystals when transforming the focal length of your thermal lensing outcome.
相关工作得到了上海扬帆计划、国家重点研发计划、中国科学院战略性先导科技专项、国家自然科学基金项目、上海市优秀学术/技术带头人计划、上海市市级科技重大专项、中国科学院青年创新促进会的支持。（强场激光物理国家重点实验室供稿）
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Figure 4 Beam radius variation on the two crystals although altering the focal length with the thermal lensing influence.
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