Retracted: Optimization of radiation modes in asymmetric planar slab optical waveguides

Sanjeev Kumar Raghuwanshi,Virendra Kumar,Radha Raman Pandey

doi:10.1186/2228-5326-2-2

Abstract

In this paper, we try to optimize the substrate-radiation/substrate-cladding (cover) radiation modes in terms of their performance parameters. It is well known that the guided modes can only be normalized. However, the radiation modes can also be normalized using the delta/Dirac function. We try to optimize the waveguide design parameters for the known cases to achieve performance as good as guided modes. The formal electromagnetic theory is applied to study the radiation modes. The normalization condition on radiation mode has been carefully used during analysis. The results are found to be satisfactory. It has been concluded that we can modify the performance of radiation modes according to our requirements. The performance is compared with the guided mode. The paper discusses guidelines to optimize the radiation modes for various constraints.

Highlights

Radiation modes are useful to study the power leakage loss and to design passive wavelength division multiplexing (WDM) fiber optic network components
Since the phase constant β for the substrate-cladding radiation is in the range of [3,4,5,6]
The radiation mode may be propagated, in which case κ is given by Equation 2, or may not be propagated, in which case κ is given by Equation 7

Summary

Introduction

Radiation modes are useful to study the power leakage loss and to design passive wavelength division multiplexing (WDM) fiber optic network components. Lots of power can flow through the substrate and cover regions. These radiation modes are useful to design fiber optic coupler and WDM optical network components, and to predict the power loss in various passive WDM optical network components. It is inevitable to find out the optimum waveguide design parameters for the purpose to achieve a better device performance [1,2]. By choosing the appropriate waveguide design parameters, it is possible to perfectly match the radiation modes at the interfaces [3,4,5,6,7,8,9]. The radiation modes can be completely removed at the interfaces, which may not be possible even with guided modes

Methods

Results

Conclusion