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Optics Letters

Optics Letters


  • Vol. 12, Iss. 4 — Apr. 1, 1987
  • pp: 284–286

Exposed-core single-mode-fiber channel-dropping filter using a high-index overlay waveguide

C. A. Millar, M. C. Brierley, and S. R. Mallinson  »View Author Affiliations

Optics Letters, Vol. 12, Issue 4, pp. 284-286 (1987)

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Using the coupling between a standard single-mode fiber and single higher-order modes in a high-index overlay waveguide, we demonstrate a wavelength-filtering device with a channel-dropping response. Two types of filter are described. One uses a thin overlay waveguide, giving a single tunable dropped band response in the 1.2–1.6-μm wavelength region with rejection greater than 20 dB and an insertion loss of about 0.5 dB. The other uses a thick overlay waveguide and gives a comb-filter response with a dropped channel spacing of 13 nm with 20-dB rejection and an insertion loss of between 1 and 4 dB.

© 1987 Optical Society of America

Original Manuscript: October 14, 1986
Manuscript Accepted: January 6, 1987
Published: April 1, 1987

C. A. Millar, M. C. Brierley, and S. R. Mallinson, "Exposed-core single-mode-fiber channel-dropping filter using a high-index overlay waveguide," Opt. Lett. 12, 284-286 (1987)

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