Compact microring notch filters

Author

Absil, P.P. ; Hryniewicz, J.V. ; Little, B.E. ; Wilson, R.A. ; Joneckis, L.G. ; Ho, P.-T.

Author_Institution

Lab. for Phys. Sci., College Park, MD, USA

Volume

12

Issue

4

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

398

Lastpage

400

Abstract

Microresonator filters reported so far have been all-pole-type filters. We report two experimental realizations of zero-type (notch) filters using GaAs-AlGaAs microring resonators. The first is a ring coupled to one side of a Mach-Zehnder interferometer, the Y-branch of which has an effective splitting angle of 50/spl deg/ with 0.5-dB loss. The second is a ring whose loss exactly matches the coupling to the input/output waveguide with an extinction greater than 20 dB.

Keywords

III-V semiconductors; Mach-Zehnder interferometers; aluminium compounds; gallium arsenide; integrated optics; micro-optics; notch filters; optical losses; optical resonators; optical waveguide filters; semiconductor heterojunctions; GaAs-AlGaAs; GaAs-AlGaAs microring resonators; Mach-Zehnder interferometer; Y-branch; all-pole-type filters; compact microring notch filters; coupling; effective splitting angle; extinction; input/output waveguide; loss; microresonator filters; notch filters; zero-type filters; Chebyshev approximation; Matched filters; Optical filters; Optical interferometry; Optical losses; Optical resonators; Optical ring resonators; Optical waveguides; Resonator filters; Throughput;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.839031

Filename

839031