Results 161 to 170 of about 71,755 (196)
Some of the next articles are maybe not open access.
Leaky modes in graded index optical fibers
Applied Optics, 1976Leaky mode attenuation coefficients for graded index optical fibers are derived using the WKB approximation. For the case of a parabolic index profile, the attenuation coefficients for explicitly evaluated and used to calculate the leaky mode contribution to near field and attenuation measurements.
openaire +2 more sources
MEMS tunable resonant leaky mode filters
IEEE Photonics Technology Letters, 2006A tunable double-grating resonant leaky mode microelectromechanical-type element is introduced. A significant level of tunability is demonstrated by adjusting mechanically the structural symmetry of the grating profile. Tuning is also possible by variation of the thickness of the resonant layer.
R. Magnusson, Y. Ding
openaire +1 more source
Leaky-modes leakage from planar circuits
1997 IEEE MTT-S International Microwave Symposium Digest, 2002Inherent leakages in certain two-dimensional planar circuits are related to the propagation of leaky modes, contrasting to the conventional awareness of the association of leaky modes with the uniform waveguides. Both theoretical and experimental studies confirm that the newly found phenomena exist in proximity-coupled or direct-fed two-dimensional ...
null Kuo-Cheng Chen, C.-K.C. Tzuang
openaire +1 more source
Two-dimensional coupled-mode theory for modeling leaky-mode arrays
Optics Letters, 1990The use of a two-dimensional coupled-mode theory for modeling buried-ridge-waveguide index-guided arrays in general and leaky-mode arrays in particular is described. This formalism provides a framework for understanding the complicated modal structure of leaky-mode arrays by expressing their modes as linear combinations of the two dimensional modes of ...
openaire +2 more sources
Understanding leaky modes: slab waveguide revisited
Advances in Optics and Photonics, 2009Computational methods for determining the complex propagation constants of leaky waveguide modes have become so powerful and so readily available that it is possible to use these methods with little understanding of what they are calculating. We compare different computational methods for calculating the propagation constants of the leaky modes ...
Hu, Jonathan, Menyuk, Curtis
openaire +1 more source
Leaky bound modes in planar waveguides
1999 IEEE LEOS Annual Meeting Conference Proceedings. LEOS'99. 12th Annual Meeting. IEEE Lasers and Electro-Optics Society 1999 Annual Meeting (Cat. No.99CH37009), 2003We propose a new and efficient method of analyzing leaky waveguides where we graphically find the extreme reflectivity of a light ray incident from one side of the outermost cladding toward the leaky waveguide. Such a field, called the leaky bound mode by us, is briefly described and numerical examples are presented.
null Shiao-Min Tseng, null Chung-I Lin
openaire +1 more source
Leaky Quasi Modes in Curved Plates
AIP Conference Proceedings, 2005Cylindrical engineering structures can sometimes be inspected effectively using a circumferential guided wave technique to cover the full circumference from a single location. Many of these structures are embedded so that energy leaks into the surrounding material as the waves propagate around the structure.
openaire +1 more source
Leaky Modes in Nonlinear Optical Resonators
2000The aim of this lecture is to show that leaky modes provide a convenient mean for the study of nonlinear optical interactions in “open” resonators such as Fabry-Perot’s, multilayer structures, prism or grating couplers, etc.
R. Reinisch +3 more
openaire +2 more sources
Multifunctional Waveguide Tunnelling via Leaky Modes
Laser & Photonics ReviewsAbstractMuch effort in the past few years has been made in tunnelling, however, no work has been reported so far on how to maintain the maximum tunnelling of complex optical fields in waveguides, due to the limitations of existing physical mechanisms. Here, a new paradigm is presented for realizing anomalous wave tunnelling through a general effective ...
Chuanjie Hu +9 more
openaire +1 more source