Thin grating couplers for integrated optics: an experimental and theoretical study.
Thin grating couplers for integrated optics: an experimental and theoretical study.
复制标题
用于集成光学的薄光栅耦合器：实验和理论研究。
DOI：
10.1364/ao.14.002983
复制
发表时间：
1975
期刊：
影响因子：
1.9
通讯作者：
C. Wilkinson
中科院分区：
文献类型：
--
作者：
D. Dalgoutte;C. Wilkinson
A detailed account is given of the practical and theoretical aspects of grating or periodic couplers. Such couplers are used to launch light into thin film optical waveguides. The theoretical description stresses considerations of reciprocity. A Green's function formulation is used to calculate the radiated fields occurring when a guided wave is incident upon a grating coupler. Experiments were performed on grating couplers, formed in photoresist on top of thin film waveguides of 7059 glass deposited on glass of lower refractive index. Measurements of the coupling length and proportion of power in the various beams are presented as a function of the grating period for waveguides supporting one and many modes. Good agreement is found between the theoretical and experimental results. The methods used in the fabrication of the gratings are discussed in detail, and guidelines for the design of grating couplers are given.
