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The results indicate that the transformation of transmission mechanism can be achieved when the tir - pcfs are filled with nlc . moreover , utilizing the difference of characteristics of modes in the pbgs , we achieve the shifting of pbg and model dispersion by modulating the refractive index of filled material based on pbg theory . further , tunable photonic bandgap fibers are proposed and demonstrated 基于光子帶隙理論利用光纖傳導模式在帶隙內外傳導模式的損耗、色散等特性的差異,我們首次提出并設計了通過外界物理量調節包層中填充介質的折射率,改變光子帶隙和傳導模式的色散曲線的相對位置,從而改變傳導模式的損耗和色散等特性,最終得到了可調諧光子帶隙光纖。

2 . the effects of filling nlc in the tir - pcfs on propagation properties of high birefringent pcfs are firstly studied based on pbg theory . the influences of nlc - filling on transmission mechanism and propagation properties are researched in detail ; moreover , we compare those results with the cases of non - filled pcfs 分析了液晶填充對pcf的傳導機制和傳輸特性的影響,并與光纖在填充前pcf的基本傳導性質做了比較,研究結果表明液晶填充能夠實現光纖傳導機制的轉變,同時得到更高的雙折射。

Objectives : in our previous study , to improve the expression efficiency of human basic fibroblast growth factor ( hbfgf ) expressed in escherichia coli , we lowered the g + c content in hbfgf ' s tir region and used more preferred codons by e . coli . meanwhile we found the low insoluble product with a large quantity of dimer and higher multimer in the protein solution . it greatly decrease the bioactivity of hbfgf 目的:我們在長期實踐中發現,大腸桿菌中表達的人堿性成纖維細胞生長因子( humanbasicfibroblastgrowthfactor , hbfgf )在e . coli中表達量不高,可溶性低,蛋白溶液中大量存在二聚體,三聚體以至多聚體,使得hbfgf的生物活性大大降低。

Based on the enlarged waveguide y - branch , we introduced the sheared y - branch tir structure . after analyzing the structure parameters of the sheared asymmetrical y - branch , the extinction ratio of the tir optical switch can be more than 40db in theory . by wet erode , we finished photon - induce total internal reflection y branch optical switch with gaas material 在展寬型y分叉的基礎上,提出了隔離型非對稱y分叉全內反射結構,通過對隔離型非對稱y分叉的結構參數的分析,在理論上可以設計出消光比達到40db以上的全內反射型光開光。

The efficient sppc had been performed with 1 - hz - repetition - rate 532nm nanosecond pulses , in which phase conjugate reflectivity as high as 21 . 5 % was obtained . when sppc were operated in ce : batio3 with 532nm , 632 . 8nm and 790nm cw lasers , the maximum sppc reflectivity of 54 . 1 % , 88 . 2 % and 80 . 5 % were obtained , respectively . unlike the results reported before that four - wave mixing by stimulated photorefractive backscattering ( spb - fwm ) only exists at short wavelengths while four - wave mixing by total internal reflection ( tir - fwm ) only exists at long wavelengths , both of these two mechanisms coexist at all wavelengths from 532nm to 790nm in our experiments 通過大量的實驗全面研究了ce : batio _ 3自泵浦位相共軛特性:在低重復頻率( 1hz ) 、 532nm調q激光泵浦時最高獲得了21 . 5的位相共軛反射率,而此前報道過的建立位相共軛脈沖光最低重復頻率是10hz ;實驗中發現在532nm 790nm波長范圍內,在不同的波長激光泵浦時,同時存在兩種自泵浦位相共軛機制:全內反射?四波混頻( tir - fwm )和受激背向散射?四波混頻( spb - fwm ) ;在連續激光泵浦時,對532nm 、 632 . 8nm和790nm三種波長,最高分別獲得了54 . 1 、 88 . 2和80 . 5的位相共軛反射率;同時還研究了自泵浦位相共軛光的時間穩定性。

With these resolutions in my thoughts , i set my self upon the scout , as often as possible , and indeed so often till i was heartily tir d of it , for it was above a year and half that i waited , and for great part of that time went out to the west end , and to the south west corner of the island , almost every day , to see for canoes , but none appear d 這種做法可以說是孤注一擲之舉,難保不出差錯不僅如此,而且從另一方面來說,這種做法是否合法,也還值得懷疑。一想到要殺這么多人,流這么多血,我的心不由得顫抖起來,盡管這樣做是為了使自己獲救。我前面也已經談到過我為什么不應該主動去攻擊野人的種種理由,所以我不必在此再嚕嗦了。

Mobitai communications corp . and transasia telecommunications inc . were both eager to learn more about the canadian technology offerings , though their interest was focused mainly on mms technology for multi - media messaging via wireless devices which is already taking off in taiwan . mr . michael binder , assistant deputy minister of industry canada was the head of the canadian delegation Tir最新的destiny系列產品,甫于亞洲地區6月份的兩大主要秀展在香港會議展覽中心舉行的第十一屆亞洲國際電氣電子工程和照明科技展覽asian elenex 2004 ,以及在日本橫濱舉行的2004年世界燈飾博覽會world lighting fair 2004中首次亮相。

The analytical result of the tir mirror shows that this type of awg device with tir mirrors has high fabrication tolerance . the tapered waveguide and the output waveguide of the device are designed and improved . simulation results indicate that introduction of tapered waveguides with different widths and design improvement of the output waveguide can both improve the performance of the awg device 對全內反射鏡的分析表明這種全內反射型的awg器件具有較高的制作容差;改進設計了awg器件中的楔形波導和輸出波導,模擬結果表明不等寬楔形波導的引入可以改善awg器件的性能,對輸出波導進行改進設計同樣可以提高awg器件的性能。

Spr is a physical phenomenon of total intemal reflection ( tir ) of light at the interface between two media when a light beam propagates across such an interface from higher refractive index media to the lower . spr is sensitive to the refractive index of the surface medium . the physical characteristic of spr has been applied to chemo / biosensing in the chemistry and biology Spr原本是一種物理光學現象,由沿著金屬和介質界面傳播的電磁波所激發而形成的,它對于附著在金屬表面的介質的折射率非常敏感,化學與生物學上利用spr的這個物理特性來進行傳感分析。

The details are described as follows : 1 . the photonic bandgap theory based on total internal reflection ( tir ) pcfs filled with by high index material ( nlc ) is proposed for the first time . based on this theory , the effects of nlc - filled tir - pcfs on the transmission mechanism and propagation properties are studied using plane - wave method and full - vector fem 主要研究內容和成果包括以下基本方面: 1 、首次提出基于填充高折射率介質(液晶)的折射率引導型pcf的光子帶隙理論分析方法,在此理論的指導下,采用平面波展開法和有限單元法研究了填充對光纖傳導機制和傳輸特性的影響,研究結果表明液晶填充可以實現光子晶體光纖導光機制的轉變。

The polarization - dependent diffraction characteristics of the metallic echelle and the total internal reflection ( tir ) types of diffraction gratings are studied , and optimal design method based on the hybrid diffraction method is presented 針對目前衍射光柵器件在損耗、偏振敏感性等方面的不足,本文對金屬反射型以及內全反射型凹面光柵的偏振相關的衍射特性進行了矢量分析,并基于混合衍射方法提出了更為準確有效的優化設計方法。

( 3 ) sppc operated in ce : bati03 with 790nm continuous wave , especially concentrated on the different grating decay between tir and spb - fwm . ( 4 ) sppc operated in 632 . 8nm continuous wave , especially concentrated on comparing the experiment results with the theoretical results ( 4 )對連續632 . 8nm時位相共軛反射率與入射角度及入射位置關系的理論及實驗曲線進行比較,得到實驗與理論較為符合的結果。

In this thesis , we design and analyze a novel type of awg device with total internal reflection ( tir ) mirrors based on soi , which has characteristics of polarization compensation and compact structure . this structure is different from the conventional smit awg device 本文提出了一種基于soi材料、具有偏振補償功能、結構緊湊的全內反射型結構的awg解復用器件,區別于傳統的smit型awg器件。

5 . experiment about researches on sppc totally internal reflection mechanism were done when ce : batio3 is performed in cw titanium laser at 790nm wavelength . we compared the grating decay of tir mechanism with that of spb - fwm mechanism 并且進行了位相共軛光柵存儲實驗,實驗中發現790urn時位相共軛光柵的衰減要比532urn時慢得多,這可能與位相共軛建立機制不同有關。

During the virtual team meeting , colleagues from industry canada , dfait and posts in the greater china region reviewed the busy calendar of 2002 and tabled events planned for 2003 戴倫路斯darren luce是tir的全球工商市場業務副總裁,如是表示: destiny產品線在亞洲地區的問世,將可使tir更充分投入此地區日益增加的建筑活動之中。

At the same time we analyzed the effect of enlarged waveguide to the improvement of asymmetrical y - branch optical switch performance . we simulated and analyzed y - branch tir optical switch with enlarged waveguide with fd - bpm 然后用fd - bpm對展寬型y分叉全內反射光開關進行模擬和分析,設計了全內反射型非對稱y分叉光開關。

Tir systems ltd . , a world leader in delivering specialty lighting systems , is pleased to announce the launch of its solid state architectural specification lighting products in taipei 有鑒于創意教育近年被熱烈討論,如何訓練學生們多元的獨立思考,已成一熱門議題。

This device realizes the function of polarization compensation by utilizing the phase difference of te and tm modes reflecting on the tir mirror 該結構利用te , tm在全內反射鏡面反射時相位變化的不同來實現偏振補償功能。

Spb - fwm forms the charge grating in fe - ion deep trap , while tir - fwm builds up the charge grating in the ce - ion deep trap Spb - fwm形成了fe離子深能級上的載流子光柵,而tir - fwm形成了ce離子深能級的載流子光柵。