Analysis and design of long-period waveguide-grating couplers
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Pages (from-to) | 4363-4373 |
Journal / Publication | Journal of Lightwave Technology |
Volume | 23 |
Issue number | 12 |
Publication status | Published - Dec 2005 |
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DOI | DOI |
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Attachment(s) | Documents
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-31344482345&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(84dd48fa-c816-437f-b682-6dfc3fa76414).html |
Abstract
By means of coupled-mode theory, an optical waveguide coupler consisting of two parallel identical waveguides, each of which contains a uniform long-period grating was analyzed. The authors show that light can be coupled effectively between the two waveguides through the gratings at specific wavelengths (the resonance wavelengths) in the absence of evanescent-field coupling. The conditions for achieving 100% coupling efficiency at the resonance wavelength under various situations are highlighted and the effects of the grating parameters on the transmission spectra of the coupler are illustrated with examples. Practical waveguide designs for the realization of the coupler are also presented. The long-period waveguide-grating (LPWG) coupler is a versatile waveguide structure and should find potential applications in optical filtering, add/drop multiplexing, and optical switching. © 2005 IEEE.
Research Area(s)
- Coupled-mode theory, Long-period gratings, Optical couplers, Optical filters, Optical waveguides
Citation Format(s)
Analysis and design of long-period waveguide-grating couplers. / Bai, Yukun; Chiang, Kin Seng.
In: Journal of Lightwave Technology, Vol. 23, No. 12, 12.2005, p. 4363-4373.
In: Journal of Lightwave Technology, Vol. 23, No. 12, 12.2005, p. 4363-4373.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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