We study about how to improve the accuracy of calculating the field energy . such as high order diffracted field , hybrid method , and so on . and getting some useful conclusion 研究了提高觀測(cè)點(diǎn)場(chǎng)強(qiáng)計(jì)算精度的一些方法,如加入高階繞射、混合算法等,并對(duì)此作了一些有益的探討。
This multi - purpose optical metering system had adopted the twyman - green interferometric system as its center , containing an advanced digital wave surface interferometry and a kind of homodyne interferometer displacement testing method with nanometer - sized capacity . at the same time , many wide - applied metering technology , for example , the diffracted field ( fringe ) measurement , co - focal lens system , optical fiber sensors and 4f ( focal distance ) space filter system which can embody the chief principle of fourier optics well , were combined into it successfully . this instrument can firstly offer and show modern optical testing method in the laboratory for majors of information processing , instrument science , measuring and testing technology and automatic technology 該多功能激光光電實(shí)驗(yàn)系統(tǒng)以泰曼-格林干涉( twyman - green )光路作核心,包括先進(jìn)的數(shù)字波面干涉技術(shù)和一種基于空間干涉原理的、納米分辨率零差干涉儀位移測(cè)量方法,同時(shí)將多種新穎、工程實(shí)用價(jià)值高的測(cè)量技術(shù)和光路如衍射測(cè)量、共焦顯微技術(shù)、光纖傳感技術(shù)以及反映傅立葉光學(xué)基本光學(xué)原理的4f空間濾波系統(tǒng)也組合進(jìn)去。
The exact location of reflection and diffraction points is essential in order to calculate the polarization components of the reflected and diffracted fields and their trajectories . then , a vector addition of the received fields is carried out to obtain the total received field strength and , subsequently , the path loss along a predetermined route 該模型基于幾何光學(xué)理論、一致性幾何繞射理論和鏡像理論,通過(guò)大量的反射和繞射射線軌跡得出源點(diǎn)至場(chǎng)點(diǎn)的多條路徑,然后由矢量計(jì)算求出各場(chǎng)點(diǎn)處的路徑損耗。
The paper is concerned with the eigen functions of optical fields in dielectrics , the theories of optical waveguide eigen mode , the characteristics of optical waveguides diffracted field , the theories of mode coupling in optical waveguides and the spectral response theories and simulating method for arrayed waveguide grating . in this paper , a set of beam propagation theory based on eigen modes analysis is set up which afforded theoretical basis for designing and analyzing awg devices . experiment of fabricating sio _ ( 2 ) layer by using porus silicon is also carried out in this paper , which is a new method for fabricating waveguide cladding layer 本文以設(shè)計(jì)陣列波導(dǎo)光柵器件為目標(biāo),對(duì)介質(zhì)波導(dǎo)光場(chǎng)的本征波函數(shù),光波導(dǎo)本征模理論,光波導(dǎo)衍射場(chǎng)特性,光波導(dǎo)模式耦合理論和awg器件的光譜響應(yīng)特性及模擬方法進(jìn)行了深入研究,建立了一套基于本征模式場(chǎng)分析的光波導(dǎo)光束傳輸理論,為波導(dǎo)器件的設(shè)計(jì)提供正確的理論基礎(chǔ),并嘗試了利用多孔硅生長(zhǎng)厚的二氧化硅,用于制作波導(dǎo)包層材料。