Please use this identifier to cite or link to this item: https://doi.org/10.1117/1.1447227
Title: 1 × 2 optical waveguide filters based on multimode interference for 1.3- and 1.55-μm operation
Authors: Li, B. 
Chua, S.-J. 
Leitz, C.W.
Fitzgerald, E.A.
Keywords: Filter
Multimode interference
Optical communications
Optical design
Optical devices
Optical waveguide
Silicon-germanium
Issue Date: Mar-2002
Source: Li, B.,Chua, S.-J.,Leitz, C.W.,Fitzgerald, E.A. (2002-03). 1 × 2 optical waveguide filters based on multimode interference for 1.3- and 1.55-μm operation. Optical Engineering 41 (3) : 723-727. ScholarBank@NUS Repository. https://doi.org/10.1117/1.1447227
Abstract: A novel multimode interference optical filter design in SiGe/Si for 1.3- and 1.55-μm operation is investigated. From the theory of large single-mode rib waveguides, the width of the rib waveguide and its height and etched depth were derived for a Ge content of x = 0.04. Using the modal propagation analysis method, the coupler length of the device is evaluated and the transmission characteristics are investigated. The results show that for 1.3 μm, the optimum coupler length of the filter is 4710 μm, with an extinction ratio of 17 dB; and for 1.55 μm, the optimum coupler length of the filter is 5180 μm, with an extinction ratio of 30 dB. For both filters, insertion loss is less than 0.1 dB. © 2002 Society of Photo-Optical Instrumentation Engineers.
Source Title: Optical Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/53841
ISSN: 00913286
DOI: 10.1117/1.1447227
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