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Applied Optics

Applied Optics


  • Vol. 39, Iss. 27 — Sep. 20, 2000
  • pp: 4946–4953

Design of compact optical bends with a trench by use of finite-element and beam-propagation methods

Muttukrishnan Rajarajan, Salah S. A. Obayya, B. M. Azizur Rahman, Kenneth T. V. Grattan, and Hamdi A. El-Mikati  »View Author Affiliations

Applied Optics, Vol. 39, Issue 27, pp. 4946-4953 (2000)

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We address various approaches to the reduction of optical bending loss in photonic integrated circuits. Different methods, such as offsetting of waveguides and incorporation of the effect of an isolation trench on reduction of radiation loss, are demonstrated. A combination of the vectorial finite-element and the least-squares boundary residual methods is used to calculate transition losses and the required offset for their minimization. The semivectorial finite-element-based beam-propagation method is employed to calculate radiation loss. These vectorial approaches are also used to investigate several important properties, such as effects that are due to the sidewall slopes, rib heights, rib widths, and trench location, to optimize bend designs.

© 2000 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(130.0250) Integrated optics : Optoelectronics
(130.2790) Integrated optics : Guided waves
(250.5300) Optoelectronics : Photonic integrated circuits

Original Manuscript: March 16, 2000
Revised Manuscript: June 16, 2000
Published: September 20, 2000

Muttukrishnan Rajarajan, Salah S. A. Obayya, B. M. Azizur Rahman, Kenneth T. V. Grattan, and Hamdi A. El-Mikati, "Design of compact optical bends with a trench by use of finite-element and beam-propagation methods," Appl. Opt. 39, 4946-4953 (2000)

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