Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 18,
  • Issue 7,
  • pp. 973-
  • (2000)

Optimal Design of Grating-Assisted Directional Couplers

Not Accessible

Your library or personal account may give you access

Abstract

In this paper, a rigorous leaky mode propagation method has been used to investigate the influence of the grating period and grating index profile on the design of grating-assisted directional couplers (GADC's). A detailed explanation of resonance condition and radiation loss in terms of electromagnetic field contribution in the grating region as a function of the grating period and profile is given. Optimal design parameters have been found for well-defined structures in order to achieve either minimum coupling length or maximum coupling efficiency. A very fast method to extract the resonance condition in any grating-assisted structure by using a sinusoidal profile is proposed. Numerical results are presented for both moderately and strongly asymmetric structures in terms of normalized propagation constant, mode radiation loss, coupling length and coupling efficiency. Comparisons with grating period and coupling length predictions obtained by other methods are also shown. The rectangular profile with optimized duty cycle has been demonstrated to be the best choice in order to minimize the GADC coupling length.

[IEEE ]

PDF Article
More Like This
Design of SiON-based grating-assisted vertical directional couplers

Vittorio M. N. Passaro and Goran Z. Masanovic
Opt. Express 14(3) 1055-1063 (2006)

Iterative method for the design of a nonperiodic grating-assisted directional coupler

Pojamarn Pojanasomboon and Okan K. Ersoy
Appl. Opt. 40(17) 2821-2827 (2001)

Design of guided-wave grating-assisted tunable filters for telecommunications systems

Vittorio M. N. Passaro
Opt. Express 10(23) 1354-1360 (2002)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved