寬能譜源 的英文怎麼說
中文拼音 [kuānnéngpǔyuán]
寬能譜源
英文
broad-energy-spectrum source-
Abstract : we have studied the polarization beats spectroscopy with phase - conjugation geometry in a cascade three - level system. it was found that the accuracy for the energy - level difference measurement is determined by the homogeneous linewidths of the optical transitions. under the condition for the occurrence of beating, the frequency difference of the beat between two independent light sources could exceed the laser linewidth. the measurement accuracy for laser absolute frequency could reach the same order of magnitude as the laser linewidth
文摘:研究了級聯三能級系統中的相位共軛極化拍頻光譜術.發現其對能級差的測量精度決定於光學躍遷的均勻增寬.在符合拍頻條件時，兩獨立光源拍頻的頻差可以超出激光線寬，激光絕對頻率的測量精度可達到與激光線寬同一量級In order to realize the measurement of several parameters and broad - band spectrum ( 250nm ~ 3000nm ) on the same standard equipment, we make use of two main light paths. one is to measure spectral radiance, the other is to measure irradiance through integral sphere, translational stage and mirror changing the light path
本標準裝置涉及參數多，包括光譜輻照度、光譜輻亮度、光源色溫；光譜范圍寬，覆蓋了紫外、可見、紅外；在同一套設備上實現多參數、寬光譜以及能量強度變化為7個數量級的精確測量。We also have analyzed the photoluminescence ( pl ) spectra of some zno films, it turns out that the emission of ultraviolet light comes from the radiative recombination of excitons within nano - crystal energy band - gap, and the pl peaks move to smaller wavelength because zn are substituted by fe, co, and cu, which cause the size of the film grains smaller and the effective band - gap bigger. the red emission of zno films is due to, on the one hand, decrease of the film grains size which causes the emission intensity smaller and smaller until it disappears abruptly, on the other hand, the transition of electrons from deep donor level of the oxygen vacancies to the valence band
另外，我們還對薄膜光致發光性質進行了分析和研究，結果表明：納米結構zno薄膜的紫外發光來源於帶間激子的輻射復合發光， pl譜的帶邊發射峰發生藍移是由於fe 、 co 、 cu對zn的替代使薄膜粒子的尺寸減小，使薄膜的有效帶隙增寬； zno薄膜的紅色發光，一方面是zno顆粒尺寸的減少，帶間的激子發射峰越來越弱直至猝滅，另一方面主要是與zno晶格中的o空位有關，由深能級復合發光引起紅光發射。In this thesis, to increase the aspect ratio of liga process, several important influence factors were discussed, which includes the structure and performance of liga mask, x - ray intensity and x - ray spectrum of beam lines, the characteristic of pmma resin and the micro electroforming parameters. the au - pi mask and the au - si mask were designed by xop and origin software, after the difference between the spectrum of 3w1 and 3b1 beam line had been contrastively analyzed
本文著眼于liga技術高深寬比方面的研究，以提高本實驗室用liga技術製作微細結構的深寬比為目的，從分析各因素影響深寬比的機理出發，再加以理論設計和實驗工藝的優化和改善，分別研究討論了影響深寬比的幾大重要因素：掩模結構和性能、光源光譜和光強、 pmma光刻膠性能、電鑄工藝參數等。Then some methods including optimizing the spectrum and intensity of 3w1 beam line and improving the performance of pmma were put in force, and pmma structure with aspect ratio 100 was obtained under these optimum conditions. moreover, such steps as controlling ph, electrodepositing, using activator and a second cathode, and mending the power supply were taken to solve a series of problems coming into being during electroforming process correspondingly, for example, air holes, inner stress, and ununiformity of deposition
並針對3w1光源中硬x光成分較多、光強和功率密度太高的特點，提出了用ni吸收膜改善光譜和用x光暫波器法優化光強的方法，同時嚴格控制和改善pmma光刻膠的性能，經過反復的計算分析和實驗改進后，獲得了深寬比高達100的膠結構圖形。Ytterbium ( yb ) - doped silica fibers have a broad - gain bandwidth ( 850 ~ 1050nm ), excellent power conversion efficiency, and a broad - absorption bandwidth ( 900 ~ 1200nm ). their ability to provide amplification over the very broad wavelength range from ~ 975nm to ~ 1200nm is expected to generate increasing interest in the near future. they offer an almost ideal gain medium for the fiber lasers and fiber amplifiers that work at the wavelength around 1 m
摻鐿石英光纖具有幾個方面的優點，如能級結構簡單，與摻er3 + 、 nd3 +等稀土離子的光纖相比，不存在對泵浦光或信號光的激發態吸收（ esa ） ，可以有更高的摻雜濃度;有較寬的吸收光譜（ 850 ~ 1050nm ） ，可以利用多種泵浦光源來設計泵浦方案;輻射光譜寬（ 900 ~ 1200nm ） ，激光輸出波長可以有很寬的可調諧范圍。分享友人