Referenced Items are not available for this document.
We show through detailed simulations that the length of conventionally designed multimode-interference couplers for low (<50%) cross-coupling ratios can be shortened significantly by replacing a segment that is 3/2-times the coupling length by a minimum-width design. For the 15% cross-coupling device, this stepped-width design results in 32% length reduction. With additional incorporation of adiabatic tapering, the length reduction can increase to over 44%. Shortening of the device makes it possible to fabricate ring resonators with larger free spectral range, significantly increases the 1-dB bandwidth for the total transmittance, and also helps to reduce the radiative loss
Published in:
Photonics Technology Letters, IEEE
(Volume:19
,
Issue:
4
)
Date of Publication: Feb.15, 2007
- Page(s):
- 224 - 226
- ISSN :
- 1041-1135
- INSPEC Accession Number:
- 9316859
- Digital Object Identifier :
- 10.1109/LPT.2006.890762
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 01 March 2007
- Issue Date :
- Feb.15, 2007
- Sponsored by :
- IEEE Photonics Society
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