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An athermal optical sensor using intensity detection based on silicon microring resonators (MRs) is presented. The thermally independent sensing is realized in the sensing zone within the temperature range ±5 K. The significant phase difference in the presence of an analyte between the low-Q coupled MRs is further sensitized through an interference-based intensity sensing scheme. Better performance of the coupled MR sensor compared to conventional microring sensors is demonstrated using transfer-matrix theory. For a measurement system of 30 dB signal-to-noise ratio, a detection limit of 6.8 ×10-7 recognition indexing unit is predicted.
Published in:
Quantum Electronics, IEEE Journal of
(Volume:47
,
Issue:
3
)
Date of Publication: March 2011
- Page(s):
- 354 - 358
- ISSN :
- 0018-9197
- INSPEC Accession Number:
- 11833847
- Digital Object Identifier :
- 10.1109/JQE.2010.2090036
- Date of Current Version :
- 24 February 2011
- Issue Date :
- March 2011
- Sponsored by :
- IEEE Photonics Society
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