We offer ruled and holographic diffraction gratings 我們提供常規(guī)和全息衍射光柵。
Through research discovery the surface quality to be good , the performance fine rectangle plastic diffraction gratings 通過測試發(fā)現(xiàn),采用這種方法可以復(fù)制出表面質(zhì)量良好、性能優(yōu)良的塑料矩形光柵。
Among all kinds of demultiplexers , etched diffraction gratings ( edgs ) are regarded as one of the most potential types of planar waveguide wdm devices . this phd thesis focuses on the design , simulation and fabrication of edgs for optical communications 蝕刻衍射光柵是采用平面波導(dǎo)技術(shù)制成的集成密集波分復(fù)用器件,它具有信道損耗低、串?dāng)_小、器件尺寸小、容易擴(kuò)展信道、制作和封裝工藝相對簡單等優(yōu)點(diǎn)。
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(nèi)全反射型凹面光柵的偏振相關(guān)的衍射特性進(jìn)行了矢量分析,并基于混合衍射方法提出了更為準(zhǔn)確有效的優(yōu)化設(shè)計方法。
The design of dgwfs and the quadratically distorted diffraction gratings is introduced firstly in chapter 1 . secondly , based on the prevenient algorithms , the phase retrieval for the novel dgwcs is discussed by comparison , also more analysis is made by examples in chapter 2 第二章在總結(jié)、研究和改進(jìn)前人理論方法的基礎(chǔ)上,總結(jié)了適合光柵型波前曲率傳感器相位恢復(fù)的三種算法,并作了詳細(xì)的理論推導(dǎo)、分析和舉例說明,完善了光柵波前曲率傳感器的相位恢復(fù)理論。