A Simple Key For KGW Crystal Unveiled
A Simple Key For KGW Crystal Unveiled
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For a few applications, tungstates give a mix of numerous practical Houses. Specifically for passive mode locking, ytterbium-doped double tungstates are sometimes top-quality to other media concerning The mixture of large attain bandwidth, huge cross-sections, and comparatively good thermal Homes �?Regardless that in Just about every unique discipline greater components could be found.
In its elemental sort, potassium provides a silvery grey metallic appearance, but its compounds (for example potassium hydroxide) tend to be more often Utilized in industrial and chemical apps.
The monoclinic crystal buildings results in a pure birefringence, assisting to avoid thermally induced polarization rotation and depolarization reduction.
]. Etalon insertion would bring on further decline, nonetheless, time-to-time optimization would introduce the potential risk of ingredient hurt and instability to the program. A nonlinear regenerative amplifier could directly provide pulses which has a period as low as ninety seven fs along with a spectral bandwidth of 19 nm[
Down the road, We'll adopt a laser seed that has a broader spectral bandwidth and use an acousto-optical programmable dispersive filter to modulate the seed’s spectrum to make whole use of the gain bandwidth of our regenerative amplifier.
Ultimately, we investigated the lengthy-expression performances of SC technology in crystal samples beneath optimal pumping conditions at bigger laser repetition fees. In doing this, the crystal samples were not translated and saved within a stationary situation with regard to the pump beam in the course of the entire measurement. The examples illustrating sturdy prolonged-phrase performances of SC era in KGW and YAG crystals at significant laser repetition premiums might be here found somewhere else. Much more particularly, steady effectiveness of KGW crystal at two MHz pulse repetition charge beneath incredibly comparable pump beam focusing geometry was reported recently30, Whilst YAG crystal shown steady effectiveness for many hours at two hundred kHz pulse repetition price In spite of quite limited concentrating on the pump beam (NA=0.085)32. The extended-expression functionality assessments in LSO, LYSO and YSO exposed gradual narrowing from the SC spectra to the extensive-wavelength facet that transpired soon after a certain exposure time and will be attributed to your optical degradation of those resources. For instance, in LSO, the onset of spectral narrowing was observed after (sim 20) minutes at a laser repetition price of 10 kHz, while at a laser repetition rate of twenty kHz, secure SC era functionality was observed just for about 2 min.
]. This method was depending on The truth that the spectral emission cross-area curves vary from each other when laser polarization is paralleled to different optical axis of Yb-doped double tungstates[
The 2-pump laser could present as many as a hundred and twenty W power. Roughly 60% of the maximum pump electrical power was used inside our experiment considering the low efficiency in the dichroic mirrors. Beneath this dual-crystal configuration, our cavity supports a 100 W pump energy input, as mentioned in Portion 2.two. Large-good quality dichroic mirrors will be used in the future, and laser pulses will probably be stretched to a longer pulse period.
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 laser output under the two crystal placement configurations. The black line denotes the configuration Using the crystals placed in exactly the same orientation, whilst the red line is under the configuration of crystals put in orthogonal orientation.
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Assembling tungsten oxide hydrate nanocrystal colloids shaped by laser ablation in liquid into fast-response electrochromic movies.