Fascination About KGW Crystal
Fascination About KGW Crystal
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The thermal conductivity of common double tungstates is with the purchase to three–four W/(K m) �?which isn't bad when compared with other laser crystals (While many times fewer than for YAG), and fairly significant compared with the thermal conductivity of typical glasses.
Later on, an investigation within the spectral obtain curve of Yb:KGW in the key amplifier might be performed less than cryogenic temperature evolution from 77 K to 300 K. The Performing temperature might be controlled to realize broader acquire bandwidth and less shift within the central wavelength of the primary amplifier.
In combination with its use being a Raman crystal, KGW can be Employed in other optical purposes, for instance in laser methods and for a scintillator in health care imaging.
], but it might include much more Value to this component. The intra-cavity spectral get curve might be modulated by inserting an etalon that cuts down the actual gain on the wavelength with the most attain element[
The comparison with glasses is suitable Because the huge attain bandwidth makes it possible for e.g. tungstate femtosecond lasers and tunable lasers to contend with glass lasers.
A number of approaches are actually adopted to solve this issue. An acousto-optical programmable dispersive filter could be used to modulate the seed’s spectrum to suppress the gain-narrowing result[
At last, we investigated the extended-time period performances of SC generation in crystal samples underneath best pumping problems at better laser repetition rates. In doing this, the crystal samples were not translated and held within a stationary posture with regard on the pump beam during the complete measurement. The illustrations illustrating robust extended-term performances of SC technology in KGW and YAG crystals at significant laser repetition prices can be uncovered elsewhere. A lot more specifically, secure general performance of KGW crystal at two MHz pulse repetition fee less than quite identical pump more info beam focusing geometry was claimed recently30, whereas YAG crystal shown stable functionality for various hrs at 200 kHz pulse repetition amount Despite incredibly tight concentrating with the pump beam (NA=0.085)32. The very long-term overall performance exams in LSO, LYSO and YSO discovered gradual narrowing of your SC spectra on the lengthy-wavelength aspect that occurred just after a certain exposure time and could be attributed to the optical degradation of such materials. As an illustration, in LSO, the onset of spectral narrowing was observed right after (sim 20) minutes in a laser repetition level of ten kHz, even though in a laser repetition level of twenty kHz, steady SC generation overall performance was noticed just for about two min.
Therefore, with an additional improvement within our regenerative amplifier, 2 mJ compressed pulses can be envisioned, without having damaging any ingredient inside our compressor.
We formulated a diode-pumped Yb:KGW regenerative amplifier as the front stop on the kilohertz terawatt laser method. Wide bandwidth pulses had been obtained by applying dual crystals with distinctive orientations of their optical axes[
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）
-switched output spectrum from the regenerative amplifier supports a sub-a hundred and sixty fs pulse amplification. For that reason, pulses with energies of around 2 mJ and length beneath two hundred fs might be obtained working with larger-quality dichroic mirrors and also a broader-spectrum laser seed. This regenerative amplifier performs as a great pre-amplifier for further more laser amplification.
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