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Applied Optics

Applied Optics


  • Vol. 42, Iss. 7 — Mar. 1, 2003
  • pp: 1236–1243

Laser direct writing polymeric single-mode waveguide devices with a rib structure

Alok K. Das  »View Author Affiliations

Applied Optics, Vol. 42, Issue 7, pp. 1236-1243 (2003)

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A focused argon-ion laser beam is used on a spin-coated polymeric thin-film deposited upon a SiO2/Si substrate to polymerize the core for fabrication of Gaussian profile optical channel waveguides. A rib structure that allows only the fundamental mode to propagate even with its higher dimension and high-index contrast between the core and the cladding was fabricated. When the thickness of the core-index region outside the rib section decreases, the waveguide produces higher-order modes at the output. The waveguide reported here has cross-sectional dimensions and numerical apertures that match the single-mode fibers for efficient coupling. I used a mixture of two intermiscible acrylate monomers for the cladding and the core of the waveguides. The polymerization process and its dependent dwell time or scan speed and the laser power intensity are shown. I present the operational characteristics of directional couplers using a rib waveguide structure with a core-cladding index difference.

© 2003 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(230.7380) Optical devices : Waveguides, channeled
(310.1860) Thin films : Deposition and fabrication
(310.2790) Thin films : Guided waves

Original Manuscript: April 26, 2002
Revised Manuscript: September 26, 2002
Published: March 1, 2003

Alok K. Das, "Laser direct writing polymeric single-mode waveguide devices with a rib structure," Appl. Opt. 42, 1236-1243 (2003)

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