Small V-bend silica waveguide using an elliptic mirror for miniaturization of planar lightwave circuits

Takanori Suzuki, Yutaka Shibata, Hiroyuki Tsuda

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A small v-bend optical waveguide using an elliptic mirror to miniaturize planar lightwave circuits has been proposed and fabricated. The v-bend waveguide is composed of a succession of single-mode curved waveguides, straight waveguides, a slab waveguide, and an elliptic Ag mirror. The design of the v-bend structure has been optimized to reduce the bending area. For example, the area of the 180° v-bend structure with a refractive index difference of 0.75% is approximately 0.25 mm × 1.1 mm, much smaller than that of a curved waveguide (10 mm × 5 mm). The detailed structure has been designed, with fabrication tolerances being investigated using a finite difference time domain (FDTD) method and a beam propagation method (BPM). The v-bend waveguides were fabricated with the usual silica waveguide processes: Ag metal was deposited on the etched surface using sputtering, electron beam deposition, or silver mirror reaction. The average total, polarization-dependent, and wavelength-dependent loss are about 1.9, 0.01, and 0.1 dB, respectively, in the wavelength range 1540-1600 nm. The origins of the v-bend waveguide loss have been studied and are attributed to the mirror position misalignment, the mirror facet tilt, the mirror surface roughness, and the mirror absorption.

Original languageEnglish
Pages (from-to)902-908
Number of pages7
JournalJournal of Lightwave Technology
Volume23
Issue number2
DOIs
Publication statusPublished - 2005 Feb

Fingerprint

miniaturization
Mirrors
Waveguides
Silica
mirrors
silicon dioxide
waveguides
Networks (circuits)
Electric losses
Beam propagation method
Wavelength
Finite difference time domain method
Optical waveguides
Sputtering
finite difference time domain method
Electron beams
wavelengths
Refractive index
optical waveguides
misalignment

Keywords

  • Integrated optics
  • Mirrors
  • Optical planar waveguides
  • Waveguide bends

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Small V-bend silica waveguide using an elliptic mirror for miniaturization of planar lightwave circuits. / Suzuki, Takanori; Shibata, Yutaka; Tsuda, Hiroyuki.

In: Journal of Lightwave Technology, Vol. 23, No. 2, 02.2005, p. 902-908.

Research output: Contribution to journalArticle

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