Bloch Modes of Periodically Segmented Waveguides

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ipr1995ifb4.pdf (224.77 KB)

Links to Files

https://opg.optica.org/abstract.cfm?uri=IPR-1995-IFB4

Permanent Link

https://doi.org/10.1364/IPR.1995.IFB4
 http://hdl.handle.net/11603/38937

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UMBC Faculty Collection
UMBC Computer Science and Electrical Engineering Department
UMBC Student Collection

Author/Creator

Author/Creator ORCID

https://orcid.org/0000-0003-0269-8433
 https://orcid.org/0000-0002-4975-4175

Date

1995-02-23

Type of Work

conference papers and proceedings
Text

Department

Program

Citation of Original Publication

Sivasubramaniam, S. Y., V. R. Chinni, C. R. Menyuk, and P. K. A. Wai. "Bloch Modes of Periodically Segmented Waveguides" In Integrated Photonics Research (1995), Paper IFB4, IFB4. Optica Publishing Group, 1995. https://doi.org/10.1364/IPR.1995.IFB4.

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Subjects

Refractive index
First order optics
Waveguides
Potassium titanyl phosphate
UMBC Optical Fiber Communications Laboratory
UMBC High Performance Computing Facility (HPCF)
Second harmonic generation
Waveguide modes
UMBC Computational Photonics Lab

Abstract

Quasi-phase-matched second-harmonic generation of visible light in optical waveguides is a promising source of blue-green coherent light that may have applications to optical disk storage systems. Bierlein, et al. have studied periodically segmented waveguides in KTP and have demonstrated that it is possible to efficiently generate blue-green light. A typical structure consists of an array of ion-exchanged regions with refractive index n₀ + Δn, that is embedded in a medium with refractive index no, as shown in Fig 1. This structure is unconventional because guiding and unguiding sections alternate. Extremely low loss has been experimentally observed in these devices, indicating that guiding does exist despite the segmentation. In this paper, we show that within the limit of the paraxial approximation and neglecting back reflections, lossless guided Bloch modes exist and we numerically determine the propagation constants and mode structures.