BENDS IN OPTICAL DIELECTRIC GUIDES

被引:530
作者
MARCATILI, EA
机构
来源
BELL SYSTEM TECHNICAL JOURNAL | 1969年 / 48卷 / 07期
关键词
D O I
10.1002/j.1538-7305.1969.tb01167.x
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Light transmission through a curved dielectric rod of rectangular cross section embedded in different dielectrics is analyzed in closed, though approximate form. We distinguish three ranges: Small cross section guides such as a thin glass ribbon surrounded by air—Making its width 1 percent of the wavelength, most of the power travels outside of the glass; the attenuation coefficient of the guide is two orders of magnitude smaller than that of glass, and the radius of curvature that doubles the straight guide loss is around 10,000Λ. Medium cross section guide for integration optics—It is only a few microns on the side and capable of guiding a single mode either in low loss bends with short radii of curvature or in a high Q closed loop useful for filters. Q's of the order of 108 are theoretically achievable in loops with radii ranging from 0.04 to 1 mm, if the percentage refractive index difference between guide and surrounding dielectric lies between 0.1 and 0.01. Large cross section guides—They are multimode and are used in fiber optics. Conversion to higher order modes are found more significant than radiation loss resulting from curvature. © 1969 The Bell System Technical Journal
引用
收藏
页码:2103 / +
页数:1
相关论文
共 17 条
[1]  
BRACEY MF, 1959, IRE T ANTENNAS PROPA, V7, pS219
[2]  
GOELL JE, 1969, AT&T TECH J, V48, P2133
[3]   COUPLING OF OPTICAL FIBERS AND SCATTERING IN FIBERS [J].
JONES, AL .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1965, 55 (03) :261-&
[4]  
Kapany N. S., 1967, FIBER OPTICS
[5]   OPTICAL WAVEGUIDE OF MACROSCOPIC DIMENSIONS IN SINGLE-MODE OPERATION [J].
KAPLAN, RA .
PROCEEDINGS OF THE IEEE, 1963, 51 (08) :1144-&
[6]  
KARBOWIAK AE, 1965, ELECTRON LETT, V1, P47
[7]  
MAGNUS W, 1966, FORMULAS THEOREMS SP, P144
[8]   DIELECTRIC RECTANGULAR WAVEGUIDE AND DIRECTIONAL COUPLER FOR INTEGRATED OPTICS [J].
MARCATILI, EA .
BELL SYSTEM TECHNICAL JOURNAL, 1969, 48 (07) :2071-+
[9]   IMPROVED RELATIONS DESCRIBING DIRECTIONAL CONTROL IN ELECTROMAGNETIC WAVE GUIDANCE [J].
MARCATILI, EA ;
MILLER, SE .
BELL SYSTEM TECHNICAL JOURNAL, 1969, 48 (07) :2161-+
[10]  
MILLER SE, 1965, Patent No. 3434774