Design and fabrication of a significantly shortened multimode interference coupler for polarization splitter application |
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| Authors: | Jung Moo Hong Hyun Ho Ryu Soon Ryong Park Jae Wan Jeong Seung Gol Lee El-Hang Lee Se-Geun Park Deokha Woo Sunho Kim Beom-Hoan O |
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| Affiliation: | Sch. of Inf. & Commun. Eng., INHA Univ., Incheon, South Korea; |
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| Abstract: | We report that we have successfully designed and fabricated a significantly shortened multimode interference coupler for application in polarization splitter, using a phenomenon that we termed "quasi-state" (QS) imaging effect. First, we identified and analyzed the QS imaging effect, and, based on the QS analysis, designed and fabricated a novel multimode interference (MMI) device with its split length shortened to 1/5 of a normally designed MMI split length. The fabrication is simple and cost effective and the fabricated device shows outstanding characteristics in extinction ratio, signal homogeneity, excess loss, and tolerance in the length of the splitter. |
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