Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 22,
  • Issue 3,
  • pp. 833-
  • (2004)

Optical Spotsize Converter Using Narrow Laterally Tapered Waveguide for Planar Lightwave Circuits

Not Accessible

Your library or personal account may give you access

Abstract

We present a full description of the design and fabrication of a compact laterally tapered spotsize converter (SSC) that provides both low-loss coupling and large fabrication tolerances. The SSC is based on a laterally tapered waveguide with a narrow core width that can be fabricated simply by using the usual fabrication process. We discuss the design concept of the SSC in detail and provide a simple design procedure with which to obtain the optimum SSC design parameters. We also investigate the fiber misalignment tolerance and mode field diameter of the SSC and confirm that it is suitable for integration with large-scale optical devices. Furthermore, we examine the performance of the SSC for higher refractive index difference (Delta) of 2.0% and 2.5% with a smaller bending radius. We fabricated the 2-mm-long SSC using 1.5%-, 2.0%-, and 2.5%-Delta silica-based planar lightwave circuits. This enabled us to reduce the single-mode fiber coupling loss to 0.4 dB at a single waveguide junction with a low polarization-dependent loss of 0.05 dB regardless of the Delta; values, while providing a core width fabrication tolerance of ±0.3 µm and an endface position tolerance of ±0.2 mm.

© 2004 IEEE

PDF Article
More Like This
Vertically tapered waveguide spot size converters fabricated via a linewidth controlled grey tone lithography for InP-based photonic integrated circuits

O. Salehzadeh, M. Vachon, N. Sabourin, S. Janz, and A. J. SpringThorpe
Opt. Express 28(16) 23523-23533 (2020)

Highly efficient coupling semiconductor spot-size converter with an InP/InAlAs multiple-quantum-well core

Naoto Yoshimoto, Kenji Kawano, Hiroaki Takeuchi, Susumu Kondo, and Yoshio Noguchi
Appl. Opt. 34(6) 1007-1014 (1995)

Laterally tapered undercut active waveguide fabricated by simple wet etching method for vertical waveguide directional coupler

Fang-Zheng Lin, Yi-Jen Chiu, Shun-An Tsai, and Tsu-Hsiu Wu
Opt. Express 16(11) 7588-7594 (2008)

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